(O00-O9A)
O11.4
Pre-existing hypertension with pre-eclampsia, complicating childbirth
Exclusions 5 never code together
Excludes1 — never code together. The excluded condition and this one are mutually exclusive.
Excludes2 — not included here, but the patient may have both. Code both when documented.
Instructional notes 10
- CODES FROM THIS CHAPTER ARE FOR USE ONLY ON MATERNAL RECORDS, NEVER ON NEWBORN RECORDS
- Codes from this chapter are for use for conditions related to or aggravated by the pregnancy, childbirth, or by the puerperium (maternal causes or obstetric causes)
- Trimesters are counted from the first day of the last menstrual period. They are defined as follows:
- 1st trimester- less than 14 weeks 0 days
- 2nd trimester- 14 weeks 0 days to less than 28 weeks 0 days
- 3rd trimester- 28 weeks 0 days until delivery
- code, if applicable, from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known.Z3A
Official Guidelines 24 names this code
ICD-10-CM Official Guidelines for Coding and Reporting, quoted in full. Published by CMS and NCHS; in the public domain.
Obstetric cases require codes from chapter 15, codes in the range O00- O9A, Pregnancy, Childbirth, and the Puerperium. Chapter 15 codes have sequencing priority over codes from other chapters. Additional codes from other chapters may be used in conjunction with chapter 15 codes to further specify conditions. Should the provider document that the pregnancy is incidental to the encounter, then code Z33.1, Pregnant state, incidental, should be used in place of any chapter 15 codes. It is the provider’s responsibility to state that the condition being treated is not affecting the pregnancy.
See Section I.C.21. Factors influencing health status and contact with health services, Screening Appendix I Present on Admission Reporting Guidelines Introduction These guidelines are to be used as a supplement to the ICD-10-CM Official Guidelines for Coding and Reporting to facilitate the assignment of the Present on Admission (POA) indicator for each diagnosis and external cause of injury code reported on claim forms (UB-04 and 837 Institutional). These guidelines are not intended to replace any guidelines in the main body of the ICD-10-CM Official Guidelines for Coding and Reporting. The POA guidelines are not intended to provide guidance on when a condition should be coded, but rather, how to apply the POA indicator to the final set of diagnosis codes that have been assigned in accordance with Sections I, II, and III of the official coding guidelines. Subsequent to the assignment of the ICD-10-CM codes, the POA indicator should then be assigned to those conditions that have been coded. As stated in the Introduction to the ICD-10-CM Official Guidelines for Coding and Reporting, a joint effort between the healthcare provider and the coder is essential to achieve complete and accurate documentation, code assignment, and reporting of diagnoses and procedures. The importance of consistent, complete documentation in the medical record cannot be overemphasized. Medical record documentation from any provider involved in the care and treatment of the patient may be used to support the determination of whether a condition was present on admission or not. In the context of the official coding guidelines, the term “provider” means a physician or any qualified healthcare practitioner who is legally accountable for establishing the patient’s diagnosis. These guidelines are not a substitute for the provider’s clinical judgment as to the determination of whether a condition was/was not present on admission. The provider should be queried regarding issues related to the linking of signs/symptoms, timing of test results, and the timing of findings. Please see the CDC website for the detailed list of ICD-10-CM codes that do not require the use of a POA indicator (https://www.cdc.gov/nchs/icd/icd-10-cm/files.html). The codes and categories on this exempt list are for circumstances regarding the healthcare encounter or factors influencing health status that do not represent a current disease or injury or that describe conditions that are always present on admission. General Reporting Requirements All claims involving inpatient admissions to general acute care hospitals or other facilities that are subject to a law or regulation mandating collection of present on admission information. Present on admission is defined as present at the time the order for inpatient admission occurs -- conditions that develop during an outpatient encounter, including emergency department, observation, or outpatient surgery, are considered as present on admission. POA indicator is assigned to principal and secondary diagnoses (as defined in Section II of the Official Guidelines for Coding and Reporting) and the external cause of injury codes. Issues related to inconsistent, missing, conflicting or unclear documentation must still be resolved by the provider. If a condition would not be coded and reported based on UHDDS definitions and current official coding guidelines, then the POA indicator would not be reported. Reporting Options Y – Yes N – No U – Unknown W – Clinically undetermined Unreported/Not used – (Exempt from POA reporting) Reporting Definitions Y = present at the time of inpatient admission N = not present at the time of inpatient admission U = documentation is insufficient to determine if condition is present on admission W = provider is unable to clinically determine whether condition was present on admission or not Timeframe for POA Identification and Documentation There is no required timeframe as to when a provider (per the definition of “provider” used in these guidelines) must identify or document a condition to be present on admission. In some clinical situations, it may not be possible for a provider to make a definitive diagnosis (or a condition may not be recognized or reported by the patient) for a period of time after admission. In some cases, it may be several days before the provider arrives at a definitive diagnosis. This does not mean that the condition was not present on admission. Determination of whether the condition was present on admission or not will be based on the applicable POA guideline as identified in this document, or on the provider’s best clinical judgment. If at the time of code assignment the documentation is unclear as to whether a condition was present on admission or not, it is appropriate to query the provider for clarification. Assigning the POA Indicator Condition is on the “Exempt from Reporting” list Leave the “present on admission” field blank if the condition is on the list of ICD- 10-CM codes for which this field is not applicable. This is the only circumstance in which the field may be left blank. POA Explicitly Documented Assign Y for any condition the provider explicitly documents as being present on admission. Assign N for any condition the provider explicitly documents as not present at the time of admission. Conditions diagnosed prior to inpatient admission Assign “Y” for conditions that were diagnosed prior to admission (example: hypertension, diabetes mellitus, asthma) Conditions diagnosed during the admission but clearly present before admission Assign “Y” for conditions diagnosed during the admission that were clearly present but not diagnosed until after admission occurred. Diagnoses subsequently confirmed after admission are considered present on admission if at the time of admission they are documented as suspected, possible, rule out, differential diagnosis, or constitute an underlying cause of a symptom that is present at the time of admission. Condition develops during outpatient encounter prior to inpatient admission Assign Y for any condition that develops during an outpatient encounter prior to a written order for inpatient admission. Documentation does not indicate whether condition was present on admission Assign “U” when the medical record documentation is unclear as to whether the condition was present on admission. “U” should not be routinely assigned and used only in very limited circumstances. Coders are encouraged to query the providers when the documentation is unclear. Documentation states that it cannot be determined whether the condition was or was not present on admission Assign “W” when the medical record documentation indicates that it cannot be clinically determined whether or not the condition was present on admission. Chronic condition with acute exacerbation during the admission If a single code identifies both the chronic condition and the acute exacerbation, see POA guidelines pertaining to codes that contain multiple clinical concepts. If a single code only identifies the chronic condition and not the acute exacerbation (e.g., acute exacerbation of chronic leukemia), assign “Y.” Conditions documented as possible, probable, suspected, or rule out at the time of discharge If the final diagnosis contains a possible, probable, suspected, or rule out diagnosis, and this diagnosis was based on signs, symptoms or clinical findings suspected at the time of inpatient admission, assign “Y.” If the final diagnosis contains a possible, probable, suspected, or rule out diagnosis, and this diagnosis was based on signs, symptoms or clinical findings that were not present on admission, assign “N”. Conditions documented as impending or threatened at the time of discharge If the final diagnosis contains an impending or threatened diagnosis, and this diagnosis is based on symptoms or clinical findings that were present on admission, assign “Y”. If the final diagnosis contains an impending or threatened diagnosis, and this diagnosis is based on symptoms or clinical findings that were not present on admission, assign “N”. Acute and Chronic Conditions Assign “Y” for acute conditions that are present at time of admission and N for acute conditions that are not present at time of admission. Assign “Y” for chronic conditions, even though the condition may not be diagnosed until after admission. If a single code identifies both an acute and chronic condition, see the POA guidelines for codes that contain multiple clinical concepts. Codes That Contain Multiple Clinical Concepts Assign “N” if at least one of the clinical concepts included in the code was not present on admission (e.g., COPD with acute exacerbation and the exacerbation was not present on admission; gastric ulcer that does not start bleeding until after admission; asthma patient develops status asthmaticus after admission). Assign “Y” if all of the clinical concepts included in the code were present on admission (e.g., duodenal ulcer that perforates prior to admission). For infection codes that include the causal organism, assign “Y” if the infection (or signs of the infection) were present on admission, even though the culture results may not be known until after admission (e.g., patient is admitted with pneumonia and the provider documents Pseudomonas as the causal organism a few days later). Same Diagnosis Code for Two or More Conditions When the same ICD-10-CM diagnosis code applies to two or more conditions during the same encounter (e.g., two separate conditions classified to the same ICD-10-CM diagnosis code): Assign “Y” if all conditions represented by the single ICD-10-CM code were present on admission (e.g., bilateral unspecified age-related cataracts). Assign “N” if any of the conditions represented by the single ICD-10-CM code was not present on admission (e.g. traumatic secondary and recurrent hemorrhage and seroma is assigned to a single code T79.2, but only one of the conditions was present on admission). Obstetrical conditions Whether or not the patient delivers during the current hospitalization does not affect assignment of the POA indicator. The determining factor for POA assignment is whether the pregnancy complication or obstetrical condition described by the code was present at the time of admission or not. If the pregnancy complication or obstetrical condition was present on admission (e.g., patient admitted in preterm labor), assign “Y”. If the pregnancy complication or obstetrical condition was not present on admission (e.g., 2 degree laceration during delivery, postpartum hemorrhage that occurred during current hospitalization, fetal distress develops after admission), assign “N”. If the obstetrical code includes more than one diagnosis and any of the diagnoses identified by the code were not present on admission assign “N”. (e.g., Category O11, Pre-existing hypertension with pre-eclampsia) Perinatal conditions Newborns are not considered to be admitted until after birth. Therefore, any condition present at birth or that developed in utero is considered present at admission and should be assigned “Y”. This includes conditions that occur during delivery (e.g., injury during delivery, meconium aspiration, exposure to streptococcus B in the vaginal canal). Congenital conditions and anomalies Assign “Y” for congenital conditions and anomalies except for categories Q00- Q99, Congenital anomalies, which are on the exempt list. Congenital conditions are always considered present on admission. External cause of injury codes Assign “Y” for any external cause code representing an external cause of morbidity that occurred prior to inpatient admission (e.g., patient fell out of bed at home, patient fell out of bed in emergency room prior to admission) Assign “N” for any external cause code representing an external cause of morbidity that occurred during inpatient hospitalization (e.g., patient fell out of hospital bed during hospital stay, patient experienced an adverse reaction to a medication administered after inpatient admission).
Chapter 15 codes are to be used only on the maternal record, never on the record of the newborn.
The majority of codes in Chapter 15 have a final character indicating the trimester of pregnancy. The timeframes for the trimesters are indicated at the beginning of the chapter. If trimester is not a component of a code, it is because the condition always occurs in a specific trimester, or the concept of trimester of pregnancy is not applicable. Certain codes have characters for only certain trimesters because the condition does not occur in all trimesters, but it may occur in more than just one. Assignment of the final character for trimester should be based on the provider’s documentation of the trimester (or number of weeks) for the current admission/encounter. This applies to the assignment of trimester for pre-existing conditions as well as those that develop during or are due to the pregnancy. The provider’s documentation of the number of weeks may be used to assign the appropriate code identifying the trimester. Whenever delivery occurs during the current admission, and there is an “in childbirth” option for the obstetric complication being coded, the “in childbirth” code should be assigned. When the classification does not provide an obstetric code with an “in childbirth” option, it is appropriate to assign a code describing the current trimester.
more than one trimester In instances when a patient is admitted to a hospital for complications of pregnancy during one trimester and remains in the hospital into a subsequent trimester, the trimester character for the antepartum complication code should be assigned on the basis of the trimester when the complication developed, not the trimester of the discharge. If the condition developed prior to the current admission/encounter or represents a pre-existing condition, the trimester character for the trimester at the time of the admission/encounter should be assigned.
Each category that includes codes for trimester has a code for “unspecified trimester.” The “unspecified trimester” code should rarely be used, such as when the documentation in the record is insufficient to determine the trimester and it is not possible to obtain clarification.
Where applicable, a 7 character is to be assigned for certain categories (O31, O32, O33.3 - O33.6, O35, O36, O40, O41, O60.1, O60.2, O64, and O69) to identify the fetus for which the complication code applies. Assign 7 character “0”: • For single gestations • When the documentation in the record is insufficient to determine the fetus affected and it is not possible to obtain clarification. • When it is not possible to clinically determine which fetus is affected.
In ICD-10-CM, “completed” weeks of gestation refers to full weeks. For example, if the provider documents gestation at 39 weeks and 6 days, the code for 39 weeks of gestation should be assigned, as the patient has not yet reached 40 completed weeks.
For routine outpatient prenatal visits when no complications are present, a code from category Z34, Encounter for supervision of normal pregnancy, should be used as the first-listed diagnosis. These codes should not be used in conjunction with chapter 15 codes.
Codes from category O09, Supervision of high-risk pregnancy, are intended for use only during the prenatal period. For complications during the labor or delivery episode as a result of a high-risk pregnancy, assign the applicable complication codes from Chapter 15. If there are no complications during the labor or delivery episode, assign code O80, Encounter for full-term uncomplicated delivery. For routine prenatal outpatient visits for patients with high-risk pregnancies, a code from category O09, Supervision of high-risk pregnancy, should be used as the first-listed diagnosis. Secondary chapter 15 codes may be used in conjunction with these codes if appropriate.
In episodes when no delivery occurs, the principal diagnosis should correspond to the principal complication of the pregnancy which necessitated the encounter. Should more than one complication exist, all of which are treated or monitored, any of the complication codes may be sequenced first.
When an obstetric patient is admitted and delivers during that admission, the condition that prompted the admission should be sequenced as the principal diagnosis. If multiple conditions prompted the admission, sequence the one most related to the delivery as the principal diagnosis. A code for any complication of the delivery should be assigned as an additional diagnosis. In cases of cesarean delivery, if the patient was admitted with a condition that resulted in the performance of a cesarean procedure, that condition should be selected as the principal diagnosis. If the reason for the admission was unrelated to the condition resulting in the cesarean delivery, the condition related to the reason for the admission should be selected as the principal diagnosis.
A code from category Z37, Outcome of delivery, should be included on every maternal record when a delivery has occurred. These codes are not to be used on subsequent records or on the newborn record.
Certain categories in Chapter 15 distinguish between conditions of the mother that existed prior to pregnancy (pre-existing) and those that are a direct result of pregnancy. When assigning codes from Chapter 15, it is important to assess if a condition was pre-existing prior to pregnancy or developed during or due to the pregnancy in order to assign the correct code. Categories that do not distinguish between pre-existing and pregnancy-related conditions may be used for either. It is acceptable to use codes specifically for the puerperium with codes complicating pregnancy and childbirth if a condition arises postpartum during the delivery encounter.
Category O10, Pre-existing hypertension complicating pregnancy, childbirth and the puerperium, includes codes for hypertensive heart and hypertensive chronic kidney disease. When assigning one of the O10 codes that includes hypertensive heart disease or hypertensive chronic kidney disease, it is necessary to add a secondary code from the appropriate hypertension category to specify the type of heart failure or chronic kidney disease. See Section I.C.9. Hypertension.
Codes from categories O35, Maternal care for known or suspected fetal abnormality and damage, and O36, Maternal care for other fetal problems, are assigned only when the fetal condition is actually responsible for modifying the management of the mother, i.e., by requiring diagnostic studies, additional observation, special care, or termination of pregnancy. The fact that the fetal condition exists does not justify assigning a code from this series to the mother’s record.
In cases when surgery is performed on the fetus, a diagnosis code from category O35, Maternal care for known or suspected fetal abnormality and damage, should be assigned identifying the fetal condition. Assign the appropriate procedure code for the procedure performed. No code from Chapter 16, the perinatal codes, should be used on the mother’s record to identify fetal conditions. Surgery performed in utero on a fetus is still to be coded as an obstetric encounter.
During pregnancy, childbirth or the puerperium, a patient admitted because of an HIV-related illness should receive a principal diagnosis from subcategory O98.7-, Human immunodeficiency [HIV] disease complicating pregnancy, childbirth and the puerperium, followed by the code(s) for the HIV-related illness(es). Patients with asymptomatic HIV infection status admitted during pregnancy, childbirth, or the puerperium should receive codes of O98.7- and Z21, Asymptomatic human immunodeficiency virus [HIV] infection status.
Diabetes mellitus is a significant complicating factor in pregnancy. Pregnant patients who are diabetic should be assigned a code from category O24, Diabetes mellitus in pregnancy, childbirth, and the puerperium, first, followed by the appropriate diabetes code(s) (E08-E13) from Chapter 4.
See section I.C.4.a.3 for information on the long-term use of insulin and oral hypoglycemics.
Gestational (pregnancy induced) diabetes can occur during the second and third trimester of pregnancy in patients who were not diabetic prior to pregnancy. Gestational diabetes can cause complications in the pregnancy similar to those of pre-existing diabetes mellitus. It also puts the patient at greater risk of developing diabetes after the pregnancy. Codes for gestational diabetes are in subcategory O24.4, Gestational diabetes mellitus. No other code from category O24, Diabetes mellitus in pregnancy, childbirth, and the puerperium, should be used with a code from O24.4. The codes under subcategory O24.4 include diet controlled, insulin controlled, and controlled by oral hypoglycemic drugs. If a patient with gestational diabetes is treated with both diet and insulin, only the code for insulin-controlled is required. If a patient with gestational diabetes is treated with both diet and oral hypoglycemic medications, only the code for "controlled by oral hypoglycemic drugs" is required. Codes Z79.4, Long-term (current) use of insulin, Z79.84, Long-term (current) use of oral hypoglycemic drugs, and Z79.85, Long-term (current) use of injectable non-insulin antidiabetic drugs, should not be assigned with codes from subcategory O24.4. An abnormal glucose tolerance in pregnancy is assigned a code from subcategory O99.81, Abnormal glucose complicating pregnancy, childbirth, and the puerperium.
When assigning a chapter 15 code for sepsis complicating abortion, pregnancy, childbirth, and the puerperium, a code for the specific type of infection should be assigned as an additional diagnosis. If severe sepsis is present, a code from subcategory R65.2, Severe sepsis, and code(s) for associated organ dysfunction(s) should also be assigned as additional diagnoses.
Code O85, Puerperal sepsis, should be assigned with a secondary code to identify the causal organism (e.g., for a bacterial infection, assign a code from category B95-B96, Bacterial infections in conditions classified elsewhere). A code from category A40, Streptococcal sepsis, or A41, Other sepsis, should not be used for puerperal sepsis. If applicable, use additional codes to identify severe sepsis (R65.2-) and any associated acute organ dysfunction. Code O85 should not be assigned for sepsis following an obstetrical procedure (See Section I.C.1.d.5.b., Sepsis due to a postprocedural infection).
Index entries leading here 1
Alongside this code 5 same parent — O11
Additional references
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.