Is Q82.4 a billable ICD-10-CM code?

Yes. Q82.4 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does Q82.4 sit in the tabular list?

Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0), in the block Other congenital malformations (Q80-Q89).

What cannot be coded together with Q82.4?

Q82.4 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above Q82.4 (Q82) and apply to it just the same.

Q82.4

Q82.4 — Ectodermal dysplasia (anhidrotic)

Billable / specific codeICD-10-CMPOA exempt

Q82.4 is a billable, specific ICD-10-CM code for ectodermal dysplasia (anhidrotic). 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.

Ellis-van Creveld syndrome (Q77.6)

Excludes1 inherited from the categories above Q82.4

These are not written on Q82.4, but they bind it: a note on a category applies to every code beneath it. Billing Q82.4 with anything listed here is a denial.

Written on Q82 — Other congenital malformations of skin

acrodermatitis enteropathica (E83.2)
congenital erythropoietic porphyria (E80.0)
pilonidal cyst or sinus (L05.-)
Sturge-Weber (-Dimitri) syndrome (Q85.89)

Risk adjustment

Q82.4 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.

How Q82.4 is indexed

Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to Q82.4.

Basan's ectodermal dysplasia(hidrotic)
Bason's ectodermal dysplasia(hidrotic)
Clouston's ectodermal dysplasia(hidrotic)
Ectodermal dysplasia(anhidrotic)
Feinmesser's ectodermal dysplasia(hidrotic)
Marshall's ectodermal dysplasia(hidrotic)
Robinson's ectodermal dysplasia or syndrome(hidrotic)
Dysplasia›ectodermal(anhidrotic) (congenital) (hereditary)
Syndrome›Clouston's(hidrotic ectodermal dysplasia)
Syndrome›Siemens' ectodermal dysplasia

Code history

Q82.4 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.

Related codes at this level

Codes that share Q82. If Q82.4 is not quite right, the correct code is usually one of these.

Questions about Q82.4

Is Q82.4 a billable ICD-10-CM code?: Yes. Q82.4 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does Q82.4 sit in the tabular list?: Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0), in the block Other congenital malformations (Q80-Q89).
What cannot be coded together with Q82.4?: Q82.4 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above Q82.4 (Q82) and apply to it just the same.