ICD-10-CM 2027
ICD-10 code for unilateral craniosynostosis
From the official ICD-10-CM alphabetic index entry “Craniosynostosis › unilateral”. Page updated September 29, 2026.
About coding unilateral craniosynostosis
The ICD-10-CM code for unilateral craniosynostosis is Q75.001 (Craniosynostosis, unspecified type, unilateral).
Within Q75.00 (craniosynostosis, unspecified), Q75.001 is specifically for craniosynostosis, unspecified type, unilateral. Related codes cover type, bilateral (Q75.002) and unspecified (Q75.009).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 564 (Other Musculoskeletal System and Connective Tissue Diagnoses with MCC, relative weight 1.4908), DRG 565 (Other Musculoskeletal System and Connective Tissue Diagnoses with CC, relative weight 0.9783) and DRG 566 (Other Musculoskeletal System and Connective Tissue Diagnoses without CC/MCC, relative weight 0.7378), in MDC 08 (Diseases and Disorders of the Musculoskeletal System and Connective Tissue), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Common questions about unilateral craniosynostosis ICD-10 codes
What is the ICD-10 code for unilateral craniosynostosis?
- Q75.001 — Craniosynostosis, unspecified type, unilateral.
Is Q75.001 billable?
- Yes. Q75.001 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Q75.001 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict Q75.001 as a principal diagnosis.
Is Q75.001 a CC or MCC?
- No. Q75.001 is neither a CC nor an MCC under MS-DRG v44.0.