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E28 ICD-10-CA category: Ovarian dysfunction

E28 isn’t a code on its own. Choose one of the 6 codes beneath it, the one the documentation supports.

Official description

E28

Ovarian dysfunction

ICD-10-CA · Canada

Codes in E28

E28 isn’t a code on its own. Open the code that matches what the note documents.

E28.0Estrogen excessE28.1Androgen excessE28.2Polycystic ovarian syndromeE28.3Primary ovarian failureE28.8Other ovarian dysfunctionE28.9Ovarian dysfunction, unspecified

Notes for E28

As CIHI prints them, with any note E28 takes from the headings above it.

Excludes

Conditions classified elsewhere.

  • Isolated gonadotropin deficiency (E23.0)postprocedural ovarian failure (E89.4)
  • Galactorrhoea (N64.3)gynaecomastia (N62)From E20-E35 Disorders of other endocrine glands
  • Complications of pregnancy, childbirth and the puerperium (O00-O99)symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)transitory endocrine and metabolic disorders specific to fetus and newborn (P70-P74)From Chapter 4: Endocrine, nutritional and metabolic diseases (E00-E90)

Note

  • All neoplasms, whether functionally active or not, are classified in Chapter II. Appropriate codes in this chapter (i.e. E05.8)(E07.0) (E16-E31)(E34.-) may be used, if desired, as additional codes to indicate either functional activity by neoplasms and ectopic endocrine tissue or hyperfunction and hypofunction of endocrine glands associated with neoplasms and other conditions classified elsewhere.From Chapter 4: Endocrine, nutritional and metabolic diseases (E00-E90)

Where E28 sits

  1. 1ChapterChapter 4: Endocrine, nutritional and metabolic diseases (E00-E90)
  2. 2Block E20-E35Disorders of other endocrine glands
  3. 3Category E28Ovarian dysfunction

Source and release

Data release
ICD-10-CA · FY 2026–2027
Effective date
Apr 1, 2026
Publisher
CIHI

This page is built from the ICD-10-CA catalog that Vero Codes reads when it suggests codes: Canadian Institute for Health Information’s FY 2026–2027 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.

See E28 in the CIHI source

Frequently asked questions

Is E28 a valid ICD-10-CA code?

No. E28 (Ovarian dysfunction) is a category heading in CIHI’s ICD-10-CA FY 2026–2027 release. It holds 6 codes; record the one the documentation supports.

Where is E28 in ICD-10-CA?

E28 sits under E20-E35 Disorders of other endocrine glands, within Chapter 4: Endocrine, nutritional and metabolic diseases (E00-E90).

What coding notes apply to E28?

ICD-10-CA lists Excludes, Note notes for E28, including those from the headings it sits under. They are listed on this page with where each one comes from.

Which ICD-10-CA release does this page use?

It uses CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026 to Mar 31, 2027. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.

Codes beside E28

E20HypoparathyroidismE21Hyperparathyroidism and other disorders of parathyroid glandE22Hyperfunction of pituitary glandE23Hypofunction and other disorders of pituitary glandE24Cushing's syndromeE25Adrenogenital disordersE26HyperaldosteronismE27Other disorders of adrenal glandE29Testicular dysfunctionE30Disorders of puberty, not elsewhere classifiedE31Polyglandular dysfunctionE32Diseases of thymusE34Other endocrine disordersE35Disorders of endocrine glands in diseases classified elsewhere