N91 Absent, scanty and rare menstruation
ICD-10-CM category N91 sits in Chapter 14 (Diseases of the genitourinary system, N00-N99). It contains 6 billable codes for FY2027, effective October 1, 2026 to September 30, 2027. Always code to the most specific code available: a code with more characters that describes the diagnosis more precisely takes priority over a shorter one.
Billable codes in N91
| Code | Description |
|---|---|
N91.0 | Primary amenorrhea |
N91.1 | Secondary amenorrhea |
N91.2 | Amenorrhea, unspecified |
N91.3 | Primary oligomenorrhea |
N91.4 | Secondary oligomenorrhea |
N91.5 | Oligomenorrhea, unspecified |
Search within ICD-10-CM for N91 and related codes
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