ICD-10-CM 2027
ICD-10 code for umbilicus malformation
From the official ICD-10-CM alphabetic index entry “Malformation (congenital) › umbilicus”. Page updated September 29, 2026.
About coding umbilicus malformation
The ICD-10-CM code for umbilicus malformation is Q89.9 (Congenital malformation, unspecified).
Within Q89, choose Q89.9 (Congenital malformation, unspecified) only when documentation doesn't support a more specific option: congenital absence and malformations of spleen (Q89.0), congenital malformations of adrenal gland (Q89.1), congenital malformations of other endocrine glands (Q89.2), Situs inversus (Q89.3), conjoined twins (Q89.4), multiple congenital malformations, not elsewhere classified (Q89.7) and other specified congenital malformations (Q89.8).
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 951 (Other Factors Influencing Health Status, relative weight 0.5577), in MDC 23 (Factors Influencing Health Status and Other Contacts with Health Services), 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 umbilicus malformation ICD-10 codes
What is the ICD-10 code for umbilicus malformation?
- Q89.9 — Congenital malformation, unspecified.
Is Q89.9 billable?
- Yes. Q89.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Q89.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict Q89.9 as a principal diagnosis.
Is Q89.9 a CC or MCC?
- No. Q89.9 is neither a CC nor an MCC under MS-DRG v44.0.