All ICD10 Codes
MS-DRG 642Medical

Inborn and Other Disorders of Metabolism

Major Diagnostic Category 10·Grouped by diagnosis·FY 2027

MS-DRG 642 is a Medical Medicare Severity Diagnosis Related Group under Major Diagnostic Category 10 (MDC 10). It maps to 216 ICD-10-CM diagnosis codes. For FY 2027 it carries a relative weight of 1.3219 with a geometric mean length of stay of 3.2 days and an arithmetic mean of 4.5 days. Hospitals use this grouping to determine reimbursement for inpatient stays under Medicare.

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FY 2027 payment data

From Table 5 of the FY 2027 IPPS Final Rule (CMS).

Relative weight:
1.3219 (payment multiplier vs. the average case (1.0))
Geometric mean stay:
3.2 days (used for transfer payments)
Average stay:
4.5 days (arithmetic mean)
Post-acute transfer policy:
No (not subject to it)

Diagnosis codes (216)

As the principal diagnosis, these ICD-10-CM codes can group to DRG 642. 100% of the codes listed are billable.