O91.22

Nonpurulent mastitis associated with the puerperium

Billable FY2026 2025-10-01 → 2026-09-30

Exclusions 8 never code together

Excludes2

Excludes1

Excludes2

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 12

Inclusion terms

O91code

Use additional code

Notes

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

Use additional code

code, if applicable, from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known.Z3A

Index entries leading here 4

Mastitis (acute) (diffuse) (nonpuerperal) (subacute) N61.0
- obstetric (interstitial) (nonpurulent)
  - associated with
    - puerperium O91.22
Puerperal, puerperium (complicated by, complications)
- lymphangitis O86.89
  - breast O91.22
- galactophoritis O91.22
- mammitis O91.22
- mastitis O91.22
Lymphadenitis I88.9
- breast
  - puerperal, postpartum (nonpurulent) O91.22
Galactophoritis N61.0
- gestational, puerperal, postpartum O91.2

Alongside this code 2 same parent — O91.2

Additional references

AHA Coding Clinic® Licence required

Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.

Maps to no condition category in any loaded model.

Presence is a property of the code. Untick a model to hide it everywhere.

Present FY2024–FY2027.