ICD-10-CM 2027
ICD-10 code for ectodermal anomaly
From the official ICD-10-CM alphabetic index entry “Anomaly, anomalous (congenital) (unspecified type) › ectodermal”. Page updated September 29, 2026.
About coding ectodermal anomaly
The ICD-10-CM code for ectodermal anomaly is Q82.9 (Congenital malformation of skin, unspecified).
Within Q82, choose Q82.9 (Congenital malformation of skin, unspecified) only when documentation doesn't support a more specific option: hereditary lymphedema (Q82.0), Xeroderma pigmentosum (Q82.1), congenital cutaneous mastocytosis (Q82.2), Incontinentia pigmenti (Q82.3), ectodermal dysplasia (anhidrotic) (Q82.4), congenital non-neoplastic nevus (Q82.5), congenital sacral dimple (Q82.6) and other specified congenital malformations of skin (Q82.8).
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 606 (Minor Skin Disorders with MCC, relative weight 1.5728), DRG 607 (Minor Skin Disorders without MCC, relative weight 0.8772) and DRG 795 (Normal Newborn, relative weight 0.2022), in MDC 09 (Diseases and Disorders of the Skin, Subcutaneous Tissue and Breast) and MDC 15 (Newborns and Other Neonates with Conditions Originating in the Perinatal Period), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Common questions about ectodermal anomaly ICD-10 codes
What is the ICD-10 code for ectodermal anomaly?
- Q82.9 — Congenital malformation of skin, unspecified.
Is Q82.9 billable?
- Yes. Q82.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Q82.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict Q82.9 as a principal diagnosis.
Is Q82.9 a CC or MCC?
- No. Q82.9 is neither a CC nor an MCC under MS-DRG v44.0.