ICD-10 N99
Non-Billable HeaderIntraoperative and postprocedural complications and disorders of genitourinary system, not elsewhere classified
About ICD-10-CM N99
ICD-10-CM code N99 represents Intraoperative and postprocedural complications and disorders of genitourinary system, not elsewhere classified. This is a non-billable header code in the Genitourinary System chapter (block N99). The 2026 edition of ICD-10-CM N99 became effective on October 1, 2025. Non-billable codes cannot be used as a primary or secondary diagnosis on a claim, use a more specific child code instead.
Type 2 Excludes
Not included here, the excluded code is not part of N99, but a patient may have both conditions at the same time. Both codes may be coded together when applicable.
- irradiation cystitis (N30.4-)
- postoophorectomy osteoporosis with current pathological fracture (M80.8-)
- postoophorectomy osteoporosis without current pathological fracture (M81.8)
Medicare LCD Coverage for N99
Local Coverage Determinations (LCDs) from CMS MACs that list N99 as a covered diagnosis.
This doesn't mean the code isn't covered, it means no MAC has issued a Local Coverage Determination naming this specific code. Coverage may still apply under National Coverage Determinations or general medical-necessity rules.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing N99.
Our payer policy database covers Aetna, Cigna, Anthem, BCBS, Humana, and Medicare Advantage plans, but N99 doesn't currently appear in any indexed policy. The code may still be covered under standard plan benefits.
CPT Codes Commonly Billed with N99
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
We don't have CPT pairings indexed for this specific code yet. Use the CPT search above to find common procedures, or check your payer's published medical policy for code-specific guidance.
Codes Adjacent To N99
Other codes in section N99 (Intraoperative and postprocedural complications and disorders of genitourinary system, not elsewhere classified).
ICD-10 N99, Billing FAQ
Is ICD-10 code N99 billable? +
No, N99 is a non-billable header code. Use a more specific child code from block N99 when submitting claims.
What codes are Type 2 Excludes for N99? +
Type 2 Excludes (may be coded together when both conditions exist): irradiation cystitis (N30.4-); postoophorectomy osteoporosis with current pathological fracture (M80.8-); postoophorectomy osteoporosis without current pathological fracture (M81.8)
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on June 2, 2026.
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