ICD-10-CM 2027
ICD-10 code for prostate disorder
From the official ICD-10-CM alphabetic index entry “Disorder (of) › prostate”. Page updated September 29, 2026.
About coding prostate disorder
The ICD-10-CM code for prostate disorder is N42.9 (Disorder of prostate, unspecified). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on N42.9.
Within N42, choose N42.9 (Disorder of prostate, unspecified) only when documentation doesn't support a more specific option: calculus of prostate (N42.0), congestion and hemorrhage of prostate (N42.1), dysplasia of prostate (N42.3) and other specified disorders of prostate (N42.8).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 729 (Other Male Reproductive System Diagnoses with CC/MCC, relative weight 1.0544) and DRG 730 (Other Male Reproductive System Diagnoses without CC/MCC, relative weight 0.6597), in MDC 12 (Diseases and Disorders of the Male Reproductive System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific prostate disorder codes (official index)
- specified NEC N42.89 — Other specified disorders of prostate
Common questions about prostate disorder ICD-10 codes
What is the ICD-10 code for prostate disorder?
- N42.9 — Disorder of prostate, unspecified. More specific codes apply when the documentation supports them: N42.89.
Is N42.9 billable?
- Yes. N42.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can N42.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict N42.9 as a principal diagnosis.
Is N42.9 a CC or MCC?
- No. N42.9 is neither a CC nor an MCC under MS-DRG v44.0.