2026 ICD-10-CM Diagnosis Code Q93.52Phelan-McDermid syndrome

ICD-10-CM Codes›Q00-Q99›Q90-Q99›Q93

ICD-10-CM Q93.52
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Q93.52 is a billable ICD-10-CM diagnosis code for Phelan-McDermid syndrome. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). The code is exempt from POA reporting. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Chromosomal abnormalities.

Code Identity

ICD-10-CM Code
Q93.52
Billable Status
Yes — Valid for Submission
Code Describes
Phelan-McDermid syndrome
Short Description
Phelan-McDermid syndrome
Same as the full description in the CMS dataset.
Parent Code
Q93.5
Other deletions of part of a chromosome

Code Classification

ChapterQ00-Q99Congenital malformations, deformations and chromosomal abnormalities
SectionQ90-Q99Chromosomal abnormalities, not elsewhere classified
CategoryQ93Monosomies and deletions from the autosomes, not elsewhere classified
This CodeQ93.52Phelan-McDermid syndrome

Present on Admission (POA)Billing

Q93.52 is exempt from POA reporting on inpatient claims to general acute care hospitals. Review other POA exempt codes.

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • 22q13.3 deletion syndrome

Use Additional Code

  • code(s) to identify any associated conditions, such as:
  • autism spectrum disorder F84.0
  • degree of intellectual disabilities F70 F79
  • epilepsy and recurrent seizures G40
  • lymphedema I89.0

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Phelan-McDermid syndrome
    • Syndrome
      • 22q13.3 deletion
    • Syndrome
      • Phelan-McDermid

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR MAL009
Chromosomal abnormalities
Default principal diagnosis: inpatient Yes · outpatient Yes

Code History & ChangesHistory

Replacement Q93.52 replaces the following previously assigned code(s):

  • Q93.59 - Other deletions of part of a chromosome
FY 2024AddedAdded to the ICD-10-CM code setEffective October 1, 2023.
FY 2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About Q93.52Overview

Is Q93.52 (Other deletions of part of a chromosome) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report Phelan-McDermid syndrome on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

Is Q93.52 exempt from POA reporting?

Yes. CMS lists this code among those exempt from present on admission reporting, so hospitals do not assign a POA indicator for Phelan-McDermid syndrome on inpatient claims.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.