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E23.0 vs N97

E23.0 (Hypopituitarism) compared with N97 (Female infertility), from the official CMS tabular data.

Current data releases:ICD-10-CM FY2027 · ICD-10-PCS FY2027 · HCPCS October 2026 · MS-DRG v44 · Medicare Code Editor v44.0 · NCCI PTP Q4 2026 · MUE Q4 2026 · NCD code lists 2026-01 · LCD export September 28, 2026 · All releases and sources

Summary

These codes can be reported together when both conditions are documented, because N97 lists E23.0 under Excludes2, which marks them as distinct conditions.

Official rule
What is different?

The conditions named, billing status and chapter.E23.0 is “Hypopituitarism”; N97 is “Female infertility”. N97 is a non-billable header; E23.0 is billable. E23.0 sits in E00-E89 — Endocrine, Nutritional and Metabolic Diseases (E00-E89); N97 in N00-N99 — Diseases of the Genitourinary System (N00-N99).

Registry fact

Can these codes be reported together?

Yes, when both are documented.N97 lists E23.0 under Excludes2: “hypopituitarism (E23.0)”. Excludes2 marks distinct conditions that may both be reported when both are documented.

Official ruleGuide: Excludes1 vs Excludes2

Is there an Excludes2 relationship?

Yes.N97’s tabular entry: “hypopituitarism (E23.0)”. The note covers E23.0.

Official ruleGuide: Excludes1 vs Excludes2

Is one a parent or header code?

One is a header.N97 is a non-billable header, but E23.0 is not one of its subdivisions.

Registry fact

Nothing found in 3 other checks; 1 check does not apply
Is there an Excludes1 relationship?

None.Neither entry carries an Excludes1 note that names the other code. E23.0 carries 4 Excludes1 notes covering other codes; the side-by-side table quotes them.

Official rule

Is one more specific?

Not comparable.The codes sit in different categories; specificity is only comparable within one category.

Are there sequencing instructions?

None.Neither entry carries a Code First or Use Additional Code note that names the other.

Official rule

Are there other coding relationships?

None found.No laterality, encounter-phase, Table of Neoplasms, Table of Drugs and Chemicals, or history-versus-active-disease relationship links these codes.

MedCoder-derived

Official rule: a tabular instructional note or a section of the ICD-10-CM Official Guidelines, quoted as published. Registry fact: the codes’ own published attributes (titles, billable status, position in the hierarchy, code set). MedCoder-derived: a reading MedCoder computes from those facts; it is not itself a rule. How to read the labels

Can these codes be reported together?

Informational

Excludes2 relationship

N97
Female infertility
↔
E23.0
Hypopituitarism

What we found

Yes, when both are documented.N97 carries an Excludes2 note covering E23.0: “hypopituitarism (E23.0)”

Excludes2 marks distinct conditions — both may be reported when both are documented.

What to review

Report both only when the documentation supports both conditions; otherwise report the one documented.

Guide: Excludes1 vs Excludes2Check these on a claim

Why it matters

An Excludes2 note means the excluded condition is not part of the code above it, but a patient can have both. Report both when both are documented.

Source / rule

CMS ICD-10-CM tabular instructional notes

Official guidance behind these answers

  • Section I.A.12.b — Excludes2 · applies to: Excludes2

    A type 2 Excludes note represents “Not included here.” An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.

    ICD-10-CM Official Guidelines FY2027

Quoted from the ICD-10-CM Official Guidelines for Coding and Reporting in effect for the release shown. The tabular notes above are the code-level instruction; these sections are the convention that says how such a note is applied. Source document (CMS PDF) · Release and checksum

Side by side

Similar descriptions do not make codes interchangeable. The documentation and the official instructions decide which code applies.

Official descriptionDiffers
E23.0

Hypopituitarism

N97

Female infertility

StatusDiffers
E23.0
Billable
N97
Non-billable header

A header is not reported on a claim; a code beneath it is.

Report instead: N97.0, N97.1, N97.2, N97.8, N97.9

Excludes1Differs
E23.0
  • postprocedural hypopituitarism (E89.3)
  • short stature due to endocrine disorder (E34.3-)
  • galactorrhea (N64.3)
  • gynecomastia (N62)
N97

None at this code

Excludes2Differs
E23.0

None at this code

N97
  • female infertility associated with:
  • hypopituitarism (E23.0)
  • Stein-Leventhal syndrome (E28.2)
  • incompetence of cervix uteri (N88.3)
Use additional codeDiffers
E23.0
  • code, if applicable, for associated cachexia (E88.A)
N97

None at this code

CategoryDiffers
E23.0

E23 Hypofunction and other disorders of the pituitary gland

N97

Is itself a category

ChapterDiffers
E23.0

E00-E89 — Endocrine, Nutritional and Metabolic Diseases (E00-E89)

N97

N00-N99 — Diseases of the Genitourinary System (N00-N99)

IncludesDiffers
E23.0
  • the listed conditions whether the disorder is in the pituitary or the hypothalamus
  • Fertile eunuch syndrome
  • Hypogonadotropic hypogonadism
  • Idiopathic growth hormone deficiency
  • Isolated deficiency of gonadotropin
  • Isolated deficiency of growth hormone
  • Isolated deficiency of pituitary hormone
  • Kallmann's syndrome
  • Lorain-Levi short stature
  • Necrosis of pituitary gland (postpartum)
  • Panhypopituitarism
  • Pituitary cachexia
  • Pituitary insufficiency NOS
  • Pituitary short stature
  • Sheehan's syndrome
  • Simmonds' disease
N97
  • inability to achieve a pregnancy
  • sterility, female NOS

No Code first, Code also and 7th character note at either code.

Notes are the code’s own tabular entry, quoted as published. A note that names the other code is the one the verdict above rests on. In a row that differs, each code’s own notes are listed under it, and the notes every code shares are listed once beneath them.

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Derived from the official CMS ICD-10-CM tabular data (FY2027). A coding-rule comparison, not billing advice: payer-specific edits and medical-necessity policy are outside its scope. All data sources