N91.5
BillableOligomenorrhea, unspecified
Oligomenorrhea, unspecified
Coding Notes
Inclusion Terms
Alternative clinical terms for this condition
- Hypomenorrhea NOS
Excludes 1
Codes that cannot be used together with this code (mutual exclusion)
Excludes 2
Conditions not included here, but the patient may have both
- •certain conditions originating in the perinatal periodP04-P96
- •certain infectious and parasitic diseasesA00-B99
- •complications of pregnancy, childbirth and the puerperiumO9A)O00
- •congenital malformations, deformations and chromosomal abnormalitiesQ00-Q99
- •endocrine, nutritional and metabolic diseasesE00-E88
- •injury, poisoning and certain other consequences of external causesS00-T88
- •neoplasmsC00-D49
- •symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classifiedR00-R94
Related Codes(5)
ICD-11 Equivalents(1)
ICD-11 Equivalents
View full mappingCorresponding ICD-11 codes from the WHO crosswalk mapping
Also Known As / Clinical Terms(94)
SNOMED CT
- Infrequent menstruation52073004
- Infrequent periods52073004
- Oligomenorrhea52073004
- Oligomenorrhoea52073004
- Relative amenorrhea52073004
- Relative amenorrhoea52073004
- Hypomenorrhea64206003
- Hypomenorrhoea64206003
- Light menstrual period64206003
- Scanty period64206003
- Scanty periods64206003
- Spotting only at periods64206003
- Bleeding between periods237130006
- IMB - Intermenstrual bleeding237130006
- Intermenstrual bleeding237130006
- Mid-cycle bleeding237130006
- Spotting between periods237130006
- Ovulation bleeding266603000
- Finding of frequency of menstruation289887006
- Observation of frequency of menstruation289887006
- Light and infrequent menstruation386704007
- Scanty and infrequent menstruation386704007
- Oligoovulatory dysfunctional uterine bleeding444560000
UMLS
- HypomenorrheaC0020624
- Hypomenorrhea (finding)C0020624
- Hypomenorrhea NOSC0020624
- HypomenorrhoeaC0020624
- Light menstrual periodC0020624
- Light periodsC0020624
- Scanty periodC0020624
- Scanty periodsC0020624
- Spotting only at periodsC0020624
- decrease menstruationC0020624
- hypomenorrheaC0020624
- hypomenorrhoeaC0020624
- light menstrual periodsC0020624
- light periodC0020624
- light periodsC0020624
- periods lightC0020624
- scanty mensesC0020624
- scanty periodsC0020624
- Infrequent menstruationC0028949
- Infrequent periodsC0028949
- Light or infrequent menstrual periodsC0028949
- OligomenorrheaC0028949
- Oligomenorrhea (finding)C0028949
- Oligomenorrhea, unspecifiedC0028949
- OligomenorrheasC0028949
- OligomenorrhoeaC0028949
- Oligomenorrhoea NOSC0028949
- OpsomenorrheaC0028949
- OpsomenorrhoeaC0028949
- Relative amenorrheaC0028949
- Relative amenorrhoeaC0028949
- infrequent menstruationC0028949
- infrequent periodsC0028949
- oligomenorrheaC0028949
- oligomenorrhoeaC0028949
Clinical Terms
- Relative amenorrhoea
- Bleeding between periods
- light menstrual periods
- Hypomenorrhea NOS
- IMB - Intermenstrual bleeding
- Scanty periods
- Opsomenorrhoea
- Oligomenorrhoea
- Infrequent periods
- Mid-cycle bleeding
- Hypomenorrhoea
- decrease menstruation
- Spotting only at periods
- hypomenorrhea
- Ovulation bleeding
- Opsomenorrhea
- Oligoovulatory dysfunctional uterine bleeding
- light periods
- Relative amenorrhea
- Hypomenorrhea (finding)
- Spotting between periods
- Oligomenorrheas
- periods light
- Intermenstrual bleeding
- Light menstrual period
- Oligomenorrhea (finding)
- Light and infrequent menstruation
- Light or infrequent menstrual periods
- Finding of frequency of menstruation
- light period
- infrequent menstruation
- Oligomenorrhoea NOS
- Scanty and infrequent menstruation
- Scanty period
- scanty menses
- Observation of frequency of menstruation
Frequently Asked Questions
What is the ICD-10 code for oligomenorrhea, unspecified?
The ICD-10-CM code for oligomenorrhea, unspecified is N91.5. The full clinical description is "Oligomenorrhea, unspecified". N91.5 is a billable/specific code that can be used on insurance claims and medical billing.
What does ICD-10 code N91.5 mean?
ICD-10-CM code N91.5 represents “Oligomenorrhea, unspecified”. It is classified under Chapter 14: Diseases of the Genitourinary System and is a billable/specific code that can be used on a claim.
Is N91.5 a billable code?
Yes, N91.5 is a billable/specific ICD-10-CM code and can be used to indicate a diagnosis on a medical claim.
What chapter is N91.5 in?
N91.5 is in Chapter 14: Diseases of the Genitourinary System (codes N00-N99).
What codes cannot be used with N91.5?
N91.5 has Excludes1 notes indicating codes that cannot be used together with it, including: ovarian dysfunction (E28.-).
What SNOMED CT codes does N91.5 map to?
N91.5 maps to 7 SNOMED CT concepts: 237130006, 289887006, 64206003, 52073004, 386704007, and 2 more. SNOMED CT is a clinical terminology used in electronic health records.
What are the UMLS CUIs for N91.5?
N91.5 is linked to 2 UMLS Concept Unique Identifiers: C0020624, C0028949. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
How does N91.5 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like oligomenorrhea, unspecified affect a person's functioning — body functions, activities, participation, and environmental factors. AutoICD provides ICF Core Sets for 12+ conditions and can map clinical text to ICF categories automatically. Browse the ICF directory to explore functioning codes.
What is the ICD-11 equivalent of N91.5?
N91.5 maps to the ICD-11 code: GA20.11 (Infrequent menstrual bleeding).
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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.