N91.0
BillablePrimary amenorrhea
Primary amenorrhea
Coding Notes
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(43)
SNOMED CT
- Primary physiologic amenorrhea8913004
- Primary physiologic amenorrhoea8913004
- Physiologic amenorrhea44811000
- Physiologic amenorrhoea44811000
- Delayed menses84292000
- Delayed period84292000
- Late menses84292000
- Late period84292000
- Menstrual period late84292000
- Period has come late84292000
- Primary amenorrhea156035004
- Primary amenorrhoea156035004
UMLS
- Amenorrhea primaryC0232939
- Amenorrhea, primaryC0232939
- Amenorrhoea primaryC0232939
- Delayed MenarcheC0232939
- Primary AmenorrheaC0232939
- Primary amenorrheaC0232939
- Primary amenorrhea (finding)C0232939
- Primary amenorrhoeaC0232939
- Primary physiologic amenorrheaC0232939
- Primary physiologic amenorrhea (finding)C0232939
- Primary physiologic amenorrhoeaC0232939
- amenorrhea primaryC0232939
- primary amenorrheaC0232939
- primary amenorrhoeaC0232939
Clinical Terms
- Amenorrhea, primary
- Primary physiologic amenorrhoea
- Physiologic amenorrhea
- Delayed period
- Period has come late
- amenorrhea primary
- primary amenorrhoea
- Primary physiologic amenorrhea (finding)
- Late period
- Amenorrhoea primary
- Delayed Menarche
- Physiologic amenorrhoea
- Primary physiologic amenorrhea
- Menstrual period late
- Delayed menses
- Late menses
- Primary amenorrhea (finding)
Frequently Asked Questions
What is the ICD-10 code for primary amenorrhea?
The ICD-10-CM code for primary amenorrhea is N91.0. The full clinical description is "Primary amenorrhea". N91.0 is a billable/specific code that can be used on insurance claims and medical billing.
What does ICD-10 code N91.0 mean?
ICD-10-CM code N91.0 represents “Primary amenorrhea”. 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 N91.0 a billable code?
Yes, N91.0 is a billable/specific ICD-10-CM code and can be used to indicate a diagnosis on a medical claim.
What chapter is N91.0 in?
N91.0 is in Chapter 14: Diseases of the Genitourinary System (codes N00-N99).
What codes cannot be used with N91.0?
N91.0 has Excludes1 notes indicating codes that cannot be used together with it, including: ovarian dysfunction (E28.-).
What SNOMED CT codes does N91.0 map to?
N91.0 maps to 4 SNOMED CT concepts: 84292000, 44811000, 156035004, 8913004. SNOMED CT is a clinical terminology used in electronic health records.
What are the UMLS CUIs for N91.0?
N91.0 is linked to 1 UMLS Concept Unique Identifier: C0232939. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
How does N91.0 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like primary amenorrhea 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 N91.0?
N91.0 maps to the ICD-11 code: GA20.00 (Primary amenorrhoea).
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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.