Is N33 a billable ICD-10-CM code?

Yes. N33 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does N33 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 N33?

N33 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

N33

N33 — Bladder disorders in diseases classified elsewhere

Billable / specific codeICD-10-CM

N33 is a billable, specific ICD-10-CM code for bladder disorders in diseases classified elsewhere. It is valid for submission on a claim.

Excludes1 — never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

bladder disorder in syphilis (A52.76)
bladder disorder in tuberculosis (A18.12)
candidal cystitis (B37.41)
chlamydial cystitis (A56.01)
cystitis in gonorrhea (A54.01)
cystitis in neurogenic bladder (N31.-)
diphtheritic cystitis (A36.85)
syphilitic cystitis (A52.76)
trichomonal cystitis (A59.03)

Code first

The underlying condition must be sequenced before this code.

underlying disease, such as:
schistosomiasis (B65.0-B65.9)

Risk adjustment

N33 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

N33 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

Questions about N33

Is N33 a billable ICD-10-CM code?: Yes. N33 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does N33 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 N33?: N33 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.