N91 ICD-10-CM Code: Absent, scanty and rare menstruation
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Official description
N91Absent, scanty and rare menstruation
ICD-10-CM diagnosis code · United States clinical modification
Where N91 sits
- 1
Chapter 14
Diseases of the genitourinary system (N00-N99)
- 2
Section
Noninflammatory disorders of female genital tract (N80-N98)
- 3
Category N91
Absent, scanty and rare menstruation
- 4
Code N91
Absent, scanty and rare menstruation
Codes under N91
N91 is a non-billable category. Choose the child code that best matches the documented diagnosis.
Notes for this code
Inclusion terms
No inclusion terms are listed for N91.
Code first
No “code first” instruction is listed for N91.
Use additional code
No “use additional code” instruction is listed for N91.
Excludes1
Conditions that should not be reported together with this code.
- ovarian dysfunction (E28.-)
Excludes2
Conditions not included here that may be reported separately when present.
No Excludes2 note is listed for N91.
Source and release
- Data release
- U.S. ICD-10-CM · FY 2027
- Effective date
- Oct 1, 2026
- Publisher
- Vero Scribe Inc.
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Frequently asked questions
What does ICD-10-CM code N91 mean?
N91 is the FY 2027 U.S. ICD-10-CM code for “Absent, scanty and rare menstruation.”
Is N91 a billable or specific ICD-10-CM code?
No. N91 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.
Where is N91 located in ICD-10-CM?
N91 is listed in Chapter 14, Diseases of the genitourinary system (N00-N99), within Noninflammatory disorders of female genital tract (N80-N98) (N80–N98), under category N91, Absent, scanty and rare menstruation.
What coding notes are listed for N91?
No inclusion terms are listed for N91 in this reference record. No code-first instruction is listed. Excludes1 notes: ovarian dysfunction (E28.-). No Excludes2 note is listed.