ICD-10-CM › N00-N99 › N80-N98 › N91 Absent, scanty and rare menstruation › N91.0
Primary amenorrhea
ValidICD-10-CM diagnosis code.
Valid for claims with a date of service in the current code year.
What has happened to this code
Every change the publisher made, from 2007 to now. Entries marked draft are from the pre-implementation releases: ICD-10 took effect on 1 October 2015, so nothing before FY2016 was ever valid on a claim.
- FY2007 Added to the draft code set draft Primary amenorrhea
Official coding rules
Published by CDC for FY2027. A rule attached to a category binds every code beneath it, so the rules inherited from this code's ancestors are shown with the code they come from.
Inherited from N91 Absent, scanty and rare menstruation
Excludes1 - never coded here
- ovarian dysfunction (E28.-)
How CDC's index refers to this code
Wording from the official alphabetic index. Much of it appears nowhere in the code description, which is why a search for the everyday phrase so often finds nothing.
- Missing
- Periods
- Menstrual
- Amputation
- Loss > organ or part
- Menstruation > absent
- Absence > menstruation
- Absence > toe > with foot
- Syndrome > cardiorenal Note:
- Syndrome > cardiovascular renal Note:
- Abnormal, abnormality, abnormalities > periods
- Amenorrhea > primary
- Menstruation > delayed
- Delay, delayed > menstruation
- Failure, failed > menstruation at puberty
Codes in the same group
| Code | Description | Status |
|---|---|---|
| N91.1 | Secondary amenorrhea | Valid |
| N91.2 | Amenorrhea, unspecified | Valid |
| N91.3 | Primary oligomenorrhea | Valid |
| N91.4 | Secondary oligomenorrhea | Valid |
| N91.5 | Oligomenorrhea, unspecified | Valid |