Reserved for future guideline expansion
K31.2
BookmarkHourglass stricture and stenosis of stomach
Filed alongside this entry 165
under Deformity
- abdomen, congenital Q89.9
- acquired (unspecified site) M95.9
- adrenal gland Q89.1
- alimentary tract, congenital Q45.9
- anus (acquired) K62.89
- aorta (arch) (congenital) Q25.40
- artery (congenital) (peripheral) NOS Q27.9
- atrial septal Q21.10
- bile duct (common) (congenital) (hepatic) Q44.5
- biliary duct or passage (congenital) Q44.5
- bladder (neck) (trigone) (sphincter) (acquired) N32.89
- bone (acquired) NOS M95.9
- brain (congenital) Q04.9
- breast (acquired) N64.89
- bronchus (congenital) Q32.4
- bursa, congenital Q79.9
- capillary (acquired) I78.8
- cardiovascular system, congenital Q28.9
- cascade, stomach K31.2
- cecum (congenital) Q43.9
- cerebral, acquired G93.89
- cervix (uterus) (acquired) NEC N88.8
- cheek (acquired) M95.2
- chest (acquired) (wall) M95.4
- chin (acquired) M95.2
- choroid (congenital) Q14.3
- clavicle (acquired) M95.8
- clitoris (congenital) Q52.6
- colon (congenital) Q43.9
- cornea (acquired) H18.70
- coronary artery (acquired) I25.9
- cricoid cartilage (congenital) Q31.8
- cystic duct (congenital) Q44.5
- Dandy-Walker Q03.1
- diaphragm (congenital) Q79.1
- digestive organ NOS Q45.9
- ductus arteriosus Q25.0
- duodenal bulb K31.89
- duodenum (congenital) Q43.9
- ectodermal (congenital) NEC Q84.9
- ejaculatory duct (congenital) Q55.4
- endocrine gland NEC Q89.2
- epididymis (congenital) Q55.4
- epiglottis (congenital) Q31.8
- esophagus (congenital) Q39.9
- eustachian tube (congenital) NEC Q17.8
- eye, congenital Q15.9
- eyebrow (congenital) Q18.8
- face (acquired) M95.2
- fallopian tube, acquired N83.8
- finger (acquired) M20.00
- flexion (joint) (acquired) M21.20
- forehead (acquired) M95.2
- frontal bone (acquired) M95.2
- gallbladder (congenital) Q44.1
- gastrointestinal tract (congenital) NOS Q45.9
- globe (eye) (congenital) Q15.8
- gum, acquired NEC K06.8
- head (acquired) M95.2
- heart (congenital) Q24.9
- hepatic duct (congenital) Q44.5
- humerus (acquired) M21.82
- hypophyseal (congenital) Q89.2
- ileocecal (coil) (valve) (acquired) K63.89
- ileum (congenital) Q43.9
- ilium (acquired) M95.5
- integument (congenital) Q84.9
- intestine (large) (small) (congenital) NOS Q43.9
- iris (acquired) H21.89
- ischium (acquired) M95.5
- jaw (acquired) (congenital) M26.9
- joint (acquired) NEC M21.90
- kidney (s) (calyx) (pelvis) (congenital) Q63.9
- Klippel-Feil (brevicollis) Q76.1
- labium (majus) (minus) (congenital) Q52.79
- lacrimal passages or duct (congenital) NEC Q10.6
- larynx (muscle) (congenital) Q31.8
- lens (acquired) H27.8
- limb (acquired) M21.90
- lip (acquired) NEC K13.0
- liver (congenital) Q44.70
- lumbosacral (congenital) (joint) (region) Q76.49
- lung (congenital) Q33.9
- lymphatic system, congenital Q89.9
- Madelung's (radius) Q74.0
- mandible (acquired) (congenital) M26.9
- maxilla (acquired) (congenital) M26.9
- meninges or membrane (congenital) Q07.9
- middle ear (congenital) Q16.4
- mitral (leaflets) (valve) I05.8
- mouth (acquired) K13.79
- multiple, congenital NEC Q89.7
- muscle (acquired) M62.89
- musculoskeletal system (acquired) M95.9
- nail (acquired) L60.8
- neck (acquired) M95.3
- nervous system (congenital) Q07.9
- nipple (congenital) Q83.9
- nose (acquired) (cartilage) M95.0
- ocular muscle (congenital) Q10.3
- opticociliary vessels (congenital) Q13.2
- orbit (eye) (acquired) H05.30
- organ of Corti (congenital) Q16.5
- ovary (congenital) Q50.39
- oviduct, acquired N83.8
- palate (congenital) Q38.5
- pancreas (congenital) Q45.3
- parathyroid (gland) Q89.2
- parotid (gland) (congenital) Q38.4
- pelvis, pelvic (acquired) (bony) M95.5
- penis (glans) (congenital) Q55.69
- pericardium (congenital) Q24.8
- pharynx (congenital) Q38.8
- pituitary (congenital) Q89.2
- prepuce (congenital) Q55.69
- prostate (congenital) Q55.4
- pupil (congenital) Q13.2
- pylorus (congenital) Q40.3
- rachitic (acquired) , old or healed E64.3
- rectum (congenital) Q43.9
- reduction (extremity) (limb) , congenital Q73.8
- respiratory system (congenital) Q34.9
- rib (acquired) M95.4
- sacroiliac joint (congenital) Q74.2
- salivary gland or duct (congenital) Q38.4
- scapula (acquired) M95.8
- seminal vesicles (congenital) Q55.4
- septum, nasal (acquired) J34.2
- sigmoid (flexure) (congenital) Q43.9
- skin (congenital) Q82.9
- skull (acquired) M95.2
- spermatic cord (congenital) Q55.4
- Sprengel's (congenital) Q74.0
- sternocleidomastoid (muscle) , congenital Q68.0
- sternum (acquired) M95.4
- stomach (congenital) Q40.3
- submandibular gland (congenital) Q38.4
- submaxillary gland (congenital) Q38.4
- thorax (acquired) (wall) M95.4
- thymus (tissue) (congenital) Q89.2
- thyroid (gland) (congenital) Q89.2
- toe (acquired) M20.6
- tongue (congenital) Q38.3
- tooth, teeth K00.2
- trachea (rings) (congenital) Q32.1
- transverse aortic arch (congenital) Q25.49
- tricuspid (leaflets) (valve) I07.8
- trunk (acquired) M95.8
- urachus, congenital Q64.4
- ureter (opening) (congenital) Q62.8
- urethra (congenital) Q64.79
- urinary tract (congenital) Q64.9
- uterus (congenital) Q51.9
- uvula (congenital) Q38.5
- vagina (acquired) N89.8
- valgus NEC M21.00
- valve, valvular (congenital) (heart) Q24.8
- varus NEC M21.10
- vas deferens (congenital) Q55.4
- vein (congenital) Q27.9
- vertical talus (congenital) Q66.80
- vesicourethral orifice (acquired) N32.89
- vessels of optic papilla (congenital) Q14.2
- vitreous body, acquired H43.89
- vulva (congenital) Q52.79
Index entries, exactly as the book files them. This says they are listed together — not that any of them is documented in your chart.
Billable FY2027 2026-10-01 → 2027-09-30
How to use this page
Everything the published sources say about one code, on one page.
- Read the Excludes1 block first — it is the one that stops you coding this at all alongside another code.
- Excludes2, Code first, Use additional and Includes follow. A note inherited from a parent category is labelled with the category it came from, so you can see why it applies.
- Official Guidelines sit below. "Guidelines naming this code" cite the code or a range containing it; "Chapter guidance" is the general guidance for its chapter and is the weaker signal.
- Guideline text is quoted verbatim with its section number and page, so you can check it against the published document.
- Risk-model chips show which published CMS models map this code.
What this page does not do
- Guidance is quoted, never paraphrased — a paraphrase of a coding rule is a different rule.
- Medication candidates, where shown, are matched by condition *name* and are offered as candidates for you to judge. They are not "the drugs for this code".
Exclusions13never code together
K31.2code
K31code
K00-K95chapter
Excludes2
- certain conditions originating in the perinatal period (P04-P96)P04-P96
- certain infectious and parasitic diseases (A00-B99)A00-B99
- complications of pregnancy, childbirth and the puerperium (O00-O9A)O00-O9A
- congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)Q00-Q99
- endocrine, nutritional and metabolic diseases (E00-E88)E00-E88
- injury, poisoning and certain other consequences of external causes (S00-T88)S00-T88
- neoplasms (C00-D49)C00-D49
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)R00-R94
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 notes1
K31code
Includes
- functional disorders of stomach
Official Guidelines1names this code
ICD-10-CM Official Guidelines for Coding and Reporting, quoted in full. Published by CMS and NCHS; in the public domain.
Index entries leading here6
Alongside this code11same parent — K31
K31.0 Acute dilatation of stomach K31.1 Adult hypertrophic pyloric stenosis K31.B Hypertrophic pyloric stenosis, in childhood K31.3 Pylorospasm, not elsewhere classified K31.4 Gastric diverticulum K31.5 Obstruction of duodenum K31.6 Fistula of stomach and duodenum K31.7 Polyp of stomach and duodenum K31.8 Other specified diseases of stomach and duodenum category K31.9 Disease of stomach and duodenum, unspecified K31.A Gastric intestinal metaplasia category
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.