O99.28 – Other endocrine, nutritional and metabolic diseases complicating pregnancy, childbirth and the puerperium

ICD-10-CM 2027 diagnosis code · Other obstetric conditions, not elsewhere classified

Non-billable header

ICD-10-CM code O99.28
Code
O99.28 (claims format: O9928)
Description
Other endocrine, nutritional and metabolic diseases complicating pregnancy, childbirth and the puerperium
Short description
Oth endo, nutritional and metab diseases compl preg/chldbrth
Billable
No – use a more specific code below
Valid for
Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter
15. Pregnancy, childbirth and the puerperium (O00-O9A)
Block
O94-O9A Other obstetric conditions, not elsewhere classified
Parent codes
O99 › O99.2

Billable codes under O99.28

O99.28 is a header code and cannot be used on claims. Choose the most specific code:

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

O99 – Other maternal diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium

Includes:
  • conditions which complicate the pregnant state, are aggravated by the pregnancy or are a main reason for obstetric care
Excludes2 (not included here):
  • when the reason for maternal care is that the condition is known or suspected to have affected the fetus (O35-O36)
Use additional code:
  • code to identify specific condition

O99.2 – Endocrine, nutritional and metabolic diseases complicating pregnancy, childbirth and the puerperium

Applicable to:
Excludes2 (not included here):
  • diabetes mellitus (O24.-)
  • malnutrition (O25.-)
  • postpartum thyroiditis (O90.5)

Index terms for O99.28

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in O99.2

Frequently asked questions

What is ICD-10 code O99.28?

O99.28 is the ICD-10-CM code for other endocrine, nutritional and metabolic diseases complicating pregnancy, childbirth and the puerperium, in the block O94-O9A (Other obstetric conditions, not elsewhere classified).

Is O99.28 a billable code?

No. O99.28 is a header code with more specific child codes; report one of the billable codes listed above.

What category does O99.28 belong to?

It belongs to category O99 – Other maternal diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.