Enhanced MS-DRG Definitions Manual

ICD-10-CM Diagnosis code M21.1

Varus deformity, not elsewhere classified

Code Hierarchy

Coding Guidelines for M21.1

M21.1 is a valid ICD-10-CM diagnosis code meaning 'Varus deformity, not elsewhere classified'.

Purely Excluded Conditions

These diag codes should never be used at the same time as M21.1 because these conditions cannot occur together:

  • metatarsus varus (Q66.22-)
  • tibia vara (M92.51-)

Complications & Comorbid Conditions (CC/MCC) Rules for M21.1

M21.1 is not a CC or MCC.

DRG Mapping Rules for M21.1

M21.1 doesn't map to any MS-DRGs.

About the Turquoise Health MS-DRG Manual Browser

We build tools and machine learning systems that simplify healthcare revenue cycle operations. We were frustrated with the formatting of the MS-DRG rules, so we built our own solution.

MS-DRG rules and ICD-10 CM/PCS codes are automatically parsed from CMS's MS-DRG data files. All content is provided strictly “AS IS” and may contain parsing errors. If you spot an error, please let us know.

We have converted the MS-DRG logic into fully structured, machine-readable data. If you need structured data versions of the MS-DRG manuals, we would love to talk with you.

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