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ICD-10-CM 2027 diagnosis code

Q82.4Ectodermal dysplasia (anhidrotic)

✓ Billable / specificPOA exempt

Q82.4 is a valid, billable ICD-10-CM code for ectodermal dysplasia (anhidrotic). It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Looking up by condition? See ICD-10 code for Basan's ectodermal dysplasia, ICD-10 code for Bason's ectodermal dysplasia, ICD-10 code for Clouston's ectodermal dysplasia, ICD-10 code for Marshall's ectodermal dysplasia.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About Q82.4

Q82.4 is the ICD-10-CM diagnosis code for ectodermal dysplasia (anhidrotic). It belongs to category Q82 (other congenital malformations of skin), block Q80-Q89 (other congenital malformations) and chapter 17 (congenital malformations, deformations, chromosomal abnormalities, and genetic disorders). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within Q82 (other congenital malformations of skin), Q82.4 is specifically for ectodermal dysplasia (anhidrotic). Related codes cover hereditary lymphedema (Q82.0), Xeroderma pigmentosum (Q82.1), congenital cutaneous mastocytosis (Q82.2), Incontinentia pigmenti (Q82.3), congenital non-neoplastic nevus (Q82.5), congenital sacral dimple (Q82.6), other specified congenital malformations of skin (Q82.8) and congenital malformation of skin, unspecified (Q82.9).

Don't report Q82.4 together with the conditions in its Excludes1 note: Ellis-van Creveld syndrome (Q77.6).

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) and DRG 607 (Minor Skin Disorders without MCC, relative weight 0.8772), in MDC 09 (Diseases and Disorders of the Skin, Subcutaneous Tissue and Breast), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It is exempt from present-on-admission (POA) reporting, so no POA indicator is required.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 757.31 (congenital ectodermal dysplasia).

Coding notes

Excludes1Not coded here — never report together with this code
  • Ellis-van Creveld syndrome (Q77.6)

Notes that apply from higher levels

Instructions written at a parent level also apply to Q82.4.

› From Q82 Other congenital malformations of skin
Excludes1
  • acrodermatitis enteropathica (E83.2)
  • congenital erythropoietic porphyria (E80.0)
  • pilonidal cyst or sinus (L05.-)
  • Sturge-Weber (-Dimitri) syndrome (Q85.89)

Broader instructions also apply from Chapter 17: Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders.

Alphabetic index entries

10 entries

Terms in the official ICD-10-CM index that lead to Q82.4.

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

MDC 09 · Diseases and Disorders of the Skin, Subcutaneous Tissue and Breast

ICD-9-CM equivalent

Converter →
  • 757.31Congenital ectodermal dysplasiaexact

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about Q82.4

Is Q82.4 billable?

Yes. Q82.4 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can Q82.4 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict Q82.4 as a principal diagnosis.

Is Q82.4 a CC or MCC?

No. Q82.4 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does Q82.4 group to?

Q82.4 is used in the MS-DRG v44.0 logic for MS-DRG 606 (Minor Skin Disorders with MCC) and MS-DRG 607 (Minor Skin Disorders without MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.

What is the ICD-9 code for Q82.4?

The CMS General Equivalence Mappings map Q82.4 to ICD-9-CM 757.31.