Is N30.90 a billable ICD-10-CM code?

Yes. N30.90 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does N30.90 sit in the tabular list?

Diseases of the genitourinary system (N00-N99), in the block Other diseases of the urinary system (N30-N39).

What cannot be coded together with N30.90?

N30.90 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above N30.90 (N30) and apply to it just the same.

N30.90

N30.90 — Cystitis, unspecified without hematuria

Billable / specific codeICD-10-CM

N30.90 is a billable, specific ICD-10-CM code for cystitis, unspecified without hematuria. It is valid for submission on a claim.

Excludes1 inherited from the categories above N30.90

These are not written on N30.90, but they bind it: a note on a category applies to every code beneath it. Billing N30.90 with anything listed here is a denial.

Written on N30 — Cystitis

prostatocystitis (N41.3)

Other codes that can never be billed with N30.90

These codes carry an Excludes1 note pointing at N30.90. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading N30.90 alone.

N39.0Urinary tract infection, site not specified

Risk adjustment

N30.90 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Medicare coverage

N30.90 is named in 1 Medicare coverage policy — 1 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A56421Billing and Coding: CT of the Abdomen and Pelvis

How N30.90 is indexed

Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to N30.90.

Cystitis(exudative) (hemorrhagic) (septic) (suppurative)
Pericystitis

Code history

N30.90 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.

Related codes at this level

Codes that share N30.9. If N30.90 is not quite right, the correct code is usually one of these.

N30.91Cystitis, unspecified with hematuria

Questions about N30.90

Is N30.90 a billable ICD-10-CM code?: Yes. N30.90 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does N30.90 sit in the tabular list?: Diseases of the genitourinary system (N00-N99), in the block Other diseases of the urinary system (N30-N39).
What cannot be coded together with N30.90?: N30.90 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above N30.90 (N30) and apply to it just the same.