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N91

Non-billable

Absent, scanty and rare menstruation

Absent, scanty and rare menstruation

This is a header/category code. For billing purposes, use a more specific child code from the list below.

Status

Non-billable / Header

Block

N80-N98

Child Codes

6

Coding Notes

Excludes 1

Codes that cannot be used together with this code (mutual exclusion)

  • ovarian dysfunction (E28.-)

Excludes 2

Conditions not included here, but the patient may have both

  • 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)

Child Codes (6)

N91.0

Primary amenorrhea

BillableN91.1

Secondary amenorrhea

BillableN91.2

Amenorrhea, unspecified

BillableN91.3

Primary oligomenorrhea

BillableN91.4

Secondary oligomenorrhea

BillableN91.5

Oligomenorrhea, unspecified

Billable

Also Known As / Clinical Terms

UMLS

Frequently Asked Questions

What is ICD-10 code N91?

ICD-10-CM code N91 represents "Absent, scanty and rare menstruation". It is a non-billable header code — use a more specific child code for billing purposes.

Is N91 a billable code?

No, N91 is a non-billable header code. You need to use one of its more specific child codes for billing. There are 6 child codes under N91.

What chapter is N91 in?

N91 is in Chapter 14: Diseases of the Genitourinary System (codes N00-N99).

What codes cannot be used with N91?

N91 has Excludes1 notes indicating codes that cannot be used together with it, including: ovarian dysfunction (E28.-).

What are the subcategories under N91?

N91 has 6 child codes, including: N91.0 (Primary amenorrhea), N91.1 (Secondary amenorrhea), N91.2 (Amenorrhea, unspecified), N91.3 (Primary oligomenorrhea), and 2 more.

What are the UMLS CUIs for N91?

N91 is linked to 1 UMLS Concept Unique Identifier: C0495109. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.

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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.