ICD-10-CM 2027
ICD-10 code for mother lactation
Encounter for care and examination of lactating mother
From the official ICD-10-CM alphabetic index entry “Lactation, lactating (breast) (puerperal, postpartum) › mother (care and/or examination)”. Page updated September 29, 2026.
About coding mother lactation
The ICD-10-CM code for mother lactation is Z39.1 (Encounter for care and examination of lactating mother).
Within Z39 (encounter for maternal postpartum care and examination), Z39.1 is specifically for encounter for care and examination of lactating mother. Related codes cover care and examination of mother immediately after delivery (Z39.0) and routine postpartum follow-up (Z39.2).
Don't report Z39.1 together with the conditions in its Excludes1 note: disorders of lactation (O92.-).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
Don't confuse with (Excludes1 for Z39.1)
- disorders of lactation (O92.-)
Common questions about mother lactation ICD-10 codes
What is the ICD-10 code for mother lactation?
- Z39.1 — Encounter for care and examination of lactating mother.
Is Z39.1 billable?
- Yes. Z39.1 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Z39.1 be used as a principal diagnosis?
- No. It is not acceptable as the principal diagnosis for an inpatient stay; it may be reported as a secondary diagnosis.
Is Z39.1 a CC or MCC?
- No. Z39.1 is neither a CC nor an MCC under MS-DRG v44.0.