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ICD-10-CM 2027 diagnosis code

Q93.52Phelan-McDermid syndrome

✓ Billable / specificPOA exemptCC — complication/comorbidity

Q93.52 is a valid, billable ICD-10-CM code for phelan-mcdermid syndrome. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Looking up by condition? See ICD-10 code for Phelan-McDermid syndrome.

Code last changed in FY2024 (effective October 1, 2023). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About Q93.52

Q93.52 is the ICD-10-CM diagnosis code for Phelan-McDermid syndrome. It belongs to category Q93 (Monosomies and deletions from the autosomes, not elsewhere classified), block Q90-Q99 (chromosomal abnormalities, not elsewhere classified) and chapter 17 (congenital malformations, deformations, chromosomal abnormalities, and genetic disorders). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within Q93.5 (other deletions of part of a chromosome), Q93.52 is specifically for Phelan-McDermid syndrome. Related codes cover Angelman syndrome (Q93.51) and other deletions of part of a chromosome (Q93.59).

Use an additional 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.-) and lymphedema (I89.0).

As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.

In MS-DRG v44.0, it is part of the grouping logic for DRG 884 (Organic Disturbances and Intellectual Disability, relative weight 1.6001), in MDC 19 (Mental Diseases and Disorders), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It is exempt from present-on-admission (POA) reporting, so no POA indicator is required.

It was added in FY2024, effective October 1, 2023.

Coding notes

Applicable toConditions and synonyms classified to this code
  • 22q13.3 deletion syndrome
Use additional codeAdd a secondary code to fully describe the condition
  • 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)

Notes that apply from higher levels

Instructions written at a parent level also apply to Q93.52.

Broader instructions also apply from Q90-Q99 Chromosomal abnormalities, not elsewhere classified and Chapter 17: Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders.

Alphabetic index entries

3 entries

Terms in the official ICD-10-CM index that lead to Q93.52.

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2024 (effective 10/1/2023): Added
  • No changes since FY2024.

Common questions about Q93.52

Is Q93.52 billable?

Yes. Q93.52 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can Q93.52 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict Q93.52 as a principal diagnosis.

Is Q93.52 a CC or MCC?

Q93.52 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.

What DRG does Q93.52 group to?

Q93.52 is used in the MS-DRG v44.0 logic for MS-DRG 884 (Organic Disturbances and Intellectual Disability). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.