N91.5
Oligomenorrhea, unspecified
BillableComplete code, valid to report
N91.5 (also written N915) is a billable ICD-10-CM diagnosis code for oligomenorrhea, unspecified. It is part of the FY2027 code set, effective October 1, 2026. It is one of the 6 codes in category N91 (Absent, scanty and rare menstruation). The Alphabetic Index lists it under 1 entry. Its coding notes include 1 Excludes1 entry and 8 Excludes2 entries.
Excludes1
Not coded here. The listed conditions generally should not be reported together.
Excludes2
Not included here. Both codes may be reported if the patient has both conditions.
Also from chapter/block level (8 notes)
Inherited from Chapter 14 Diseases of the genitourinary system
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Inclusion terms
Conditions classified to this code.
This code
- Hypomenorrhea NOS
Alphabetic Index terms
Terms the official Alphabetic Index lists for this code. 1 entry