ICD-10-CM 2027
ICD-10 code for prostate dysplasia
From the official ICD-10-CM alphabetic index entry “Dysplasia › prostate”. Page updated September 29, 2026.
About coding prostate dysplasia
The ICD-10-CM code for prostate dysplasia is N42.30 (Unspecified dysplasia of prostate). The official index lists 2 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on N42.30.
Within N42.3, choose N42.30 (Unspecified dysplasia of prostate) only when documentation doesn't support a more specific option: prostatic intraepithelial neoplasia (N42.31), atypical small acinar proliferation of prostate (N42.32) and other dysplasia of prostate (N42.39).
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 dysplasia codes (official index)
Common questions about prostate dysplasia ICD-10 codes
What is the ICD-10 code for prostate dysplasia?
- N42.30 — Unspecified dysplasia of prostate. More specific codes apply when the documentation supports them: D07.5, N42.39.
What is the ICD-10 code for severe prostate dysplasia?
- D07.5 — Carcinoma in situ of prostate.
Is N42.30 billable?
- Yes. N42.30 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can N42.30 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict N42.30 as a principal diagnosis.
Is N42.30 a CC or MCC?
- No. N42.30 is neither a CC nor an MCC under MS-DRG v44.0.