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Q85.8

Q85.8: Other phakomatoses, not elsewhere classified

Non-billable headerICD-10-CM

Q85.8 is a non-billable header ICD-10-CM code for other phakomatoses, not elsewhere classified. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes1: never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

  • Meckel-Gruber syndrome (Q61.9)

Excludes1 inherited from the categories above Q85.8

A category’s note binds every code beneath it.

Written on Q85: Phakomatoses, not elsewhere classified

  • ataxia telangiectasia [Louis-Bar] (G11.3)
  • familial dysautonomia [Riley-Day] (G90.1)

Other codes that can never be billed with Q85.8

Their own Excludes1 notes name this code, so the conflict is not listed above.

  • L81Other disorders of pigmentation
  • Q82Other congenital malformations of skin

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Code history

Unchanged in every release from FY2024 to FY2027.

Code to one of these instead Q85.8

4 child codes. Green means billable.

Other codes under Q85

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.