ICD-10-CM 2027
ICD-10 code for Impression
From the official ICD-10-CM alphabetic index entry “Impression, basilar”. Page updated September 29, 2026.
About coding Impression
The ICD-10-CM code for Impression is Q75.8 (Other specified congenital malformations of skull and face bones).
Within Q75, choose Q75.8 (Other specified congenital malformations of skull and face bones) only when documentation doesn't support a more specific option: craniosynostosis (Q75.0), craniofacial dysostosis (Q75.1), Hypertelorism (Q75.2), Macrocephaly (Q75.3), Mandibulofacial dysostosis (Q75.4), Oculomandibular dysostosis (Q75.5) and congenital malformation of skull and face bones, unspecified (Q75.9).
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 Impression ICD-10 codes
What is the ICD-10 code for Impression?
- Q75.8 — Other specified congenital malformations of skull and face bones.
Is Q75.8 billable?
- Yes. Q75.8 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Q75.8 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict Q75.8 as a principal diagnosis.
Is Q75.8 a CC or MCC?
- No. Q75.8 is neither a CC nor an MCC under MS-DRG v44.0.