NPI Atlas

E28 – Ovarian dysfunction

ICD-10-CM 2027 diagnosis code · Disorders of other endocrine glands

Non-billable header

ICD-10-CM code E28

Code: E28 (claims format: E28)
Description: Ovarian dysfunction
Billable: No – use a more specific code below
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 4. Endocrine, nutritional and metabolic diseases (E00-E89)
Block: E20-E35 Disorders of other endocrine glands

Billable codes under E28

E28 is a header code and cannot be used on claims. Choose the most specific code:

E28.0 – Estrogen excessBillable
E28.1 – Androgen excessBillable
E28.2 – Polycystic ovarian syndromeBillable
E28.3 – Primary ovarian failureHeader (more codes below)
E28.8 – Other ovarian dysfunctionBillable
E28.9 – Ovarian dysfunction, unspecifiedBillable

Notes for E28

Excludes1 (not coded here):

isolated gonadotropin deficiency (E23.0)
postprocedural ovarian failure (E89.4-)

Notes inherited from parent codes

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

Block E20-E35

Excludes1 (not coded here):

galactorrhea (N64.3)
gynecomastia (N62)

Frequently asked questions

What is ICD-10 code E28?

E28 is the ICD-10-CM code for ovarian dysfunction, in the block E20-E35 (Disorders of other endocrine glands).

Is E28 a billable code?

No. E28 is a header code with more specific child codes; report one of the billable codes listed above.

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.