Non-Billable / Non-Specific Code
ICD-10-CM N91 is the diagnosis code for Absent, scanty and rare menstruation. This code falls under the section "Noninflammatory disorders of female genital tract" within Chapter 14 — Diseases of the genitourinary system (N00-N99). It is a non-billable/non-specific ICD-10-CM code that should not be used for reimbursement. A more specific sub-code is required for billing. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
The following conditions should never be coded at the same time as N91. They are mutually exclusive:
Understanding where N91 sits in the ICD-10-CM classification helps ensure proper coding:
No, N91 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
N91 is the ICD-10-CM diagnosis code for "Absent, scanty and rare menstruation". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
N91 is located in Section N80-N98 — "Noninflammatory disorders of female genital tract" within Chapter 14 of the ICD-10-CM Tabular List.
N91 has 6 sub-code(s) that provide more specific detail: N91.0, N91.1, N91.2, N91.3, N91.4 and more.
Use N91 when the patients documented diagnosis matches "Absent, scanty and rare menstruation" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Absent, scanty and rare menstruation is N91.
No, N91 is non-billable. Use a more specific sub-code for primary diagnosis billing.
N91 is in Chapter 14 of the ICD-10-CM Tabular List.
Type 1 Excludes for N91 include: ovarian dysfunction (E28.-).
Yes, N91 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.