N91.0 – Primary amenorrhea
ICD-10-CM 2027 diagnosis code · Noninflammatory disorders of female genital tract
ICD-10-CM code
N91.0
- Code
N91.0(claims format:N910)- Description
- Primary amenorrhea
- Billable
- Yes – valid for HIPAA-covered transactions
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 14. Diseases of the genitourinary system (N00-N99)
- Block
- N80-N98 Noninflammatory disorders of female genital tract
- Parent codes
- N91
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
N91 – Absent, scanty and rare menstruation
Excludes1 (not coded here):
- ovarian dysfunction (E28.-)
Index terms for N91.0
Entries in the ICD-10-CM alphabetic index that lead to this code:
Related codes in N91
- N91.1 – Secondary amenorrheaBillable
- N91.2 – Amenorrhea, unspecifiedBillable
- N91.3 – Primary oligomenorrheaBillable
- N91.4 – Secondary oligomenorrheaBillable
- N91.5 – Oligomenorrhea, unspecifiedBillable
Frequently asked questions
What is ICD-10 code N91.0?
N91.0 is the ICD-10-CM code for primary amenorrhea, in the block N80-N98 (Noninflammatory disorders of female genital tract).
Is N91.0 a billable code?
Yes. N91.0 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does N91.0 belong to?
It belongs to category N91 – Absent, scanty and rare menstruation.
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.