ICD-10-CM 2027 diagnosis code
O99.28Other endocrine, nutritional and metabolic diseases complicating pregnancy, childbirth and the puerperium
O99.28 is a header code, so it can't be reported by itself. Choose one of the 6 more specific codes beneath it.Short description: Oth endo, nutritional and metab diseases compl preg/chldbrth
Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About O99.28
O99.28 is the ICD-10-CM diagnosis code for other endocrine, nutritional and metabolic diseases complicating pregnancy, childbirth and the puerperium. It belongs to category O99 (other maternal diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium), block O94-O9A (other obstetric conditions, not elsewhere classified) and chapter 15 (pregnancy, childbirth and the puerperium). It is a header code, so it can't be reported by itself; one of its 6 subcodes must be used instead.
Within O99.2, choose O99.28 (Other endocrine, nutritional and metabolic diseases complicating pregnancy, childbirth and the puerperium) only when documentation doesn't support a more specific option: obesity complicating pregnancy, childbirth, and the puerperium (O99.21).
To report this condition, pick the subcode that matches the documentation: O99.280 (trimester), O99.281 (trimester), O99.282 (trimester), O99.283 (trimester), O99.284 (childbirth) and O99.285 (puerperium).
Use an additional code to identify specific condition.
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Specific codes under O99.28
- O99.280Endocrine, nutritional and metabolic diseases complicating pregnancy, unspecified trimesterBillable
- O99.281Endocrine, nutritional and metabolic diseases complicating pregnancy, first trimesterBillable
- O99.282Endocrine, nutritional and metabolic diseases complicating pregnancy, second trimesterBillable
- O99.283Endocrine, nutritional and metabolic diseases complicating pregnancy, third trimesterBillable
- O99.284Endocrine, nutritional and metabolic diseases complicating childbirthBillable
- O99.285Endocrine, nutritional and metabolic diseases complicating the puerperiumBillable
Notes that apply from higher levels
Instructions written at a parent level also apply to O99.28.
› From O99 Other maternal diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium
- conditions which complicate the pregnant state, are aggravated by the pregnancy or are a main reason for obstetric care
- code to identify specific condition
Broader instructions also apply from Chapter 15: Pregnancy, childbirth and the puerperium.
Alphabetic index entries
3 entriesTerms in the official ICD-10-CM index that lead to O99.28.
- Pregnancy (single) (uterine) › complicated by (care of) (management affected by) › endocrine diseases NEC
- Pregnancy (single) (uterine) › complicated by (care of) (management affected by) › metabolic disorders
- Pregnancy (single) (uterine) › complicated by (care of) (management affected by) › nutritional diseases NEC
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about O99.28
Is O99.28 billable?
- No. O99.28 is a header code. Report one of its more specific subcodes instead.