Q93.51 Angelman 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 Q93.51

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 Q93.51

• Angelman syndrome
• Happy puppet syndrome
• Syndrome › Angelman
• Syndrome › happy puppet

Nearby codes

• Q93.1 Whole chromosome monosomy, mosaicism (mitotic nondisjunction)
• Q93.2 Chromosome replaced with ring, dicentric or isochromosome
• Q93.3 Deletion of short arm of chromosome 4
• Q93.4 Deletion of short arm of chromosome 5
• Q93.5 Other deletions of part of a chromosome
• Q93.51 Angelman syndrome (this code)
• 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