Q93.82 Williams syndrome

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis. Exempt from present-on-admission (POA) reporting.

Risk adjustment (HCC)

• RxHCC V08: HCC 148 — Mild or Unspecified Intellectual Disability/Developmental Disorder

MS-DRG index

Defines the logic of DRG(s) 884 in MDC 19.

Code annotations containing back-references to Q93.82

Back-references to Q93

• Code First: D84.81 Immunodeficiency due to conditions classified elsewhere ("chromosomal abnormalities (Q90-Q99)")
• Type 1 Excludes: E25 Adrenogenital disorders ("chromosomal abnormalities (Q90-Q99)")
• Type 1 Excludes: Z15 Genetic susceptibility to disease ("chromosomal anomalies (Q90-Q99)")

Diagnosis Index entries for Q93.82

• Syndrome › Williams
• Williams syndrome

Nearby codes

• Q93.52 Phelan-McDermid syndrome
• Q93.59 Other deletions of part of a chromosome
• Q93.7 Deletions with other complex rearrangements
• Q93.8 Other deletions from the autosomes
• Q93.81 Velo-cardio-facial syndrome
• Q93.82 Williams syndrome (this code)
• Q93.88 Other microdeletions
• Q93.89 Other deletions from the autosomes
• Q93.9 Deletion from autosomes, unspecified