MS-DRG 470: Major Joint Replacement or Reattachment of Lower Extremity without MCC
TKA/THA without MCC. EXTREMELY HIGH VOLUME — most common surgical DRG
Typical indications
- Elective TKA
- Elective THA
Common denial patterns
- Conservative therapy duration <6mo
- BMI >40 step-therapy
- K&L grade <3 imaging
Appeal angles
Document 6mo PT + NSAID failure, joint injection, K&L grade 3-4 on imaging, K-2008 outcome measures.
Context: how MS-DRGs work
MS-DRGs bundle hospital inpatient payment into a single amount per admission. Each DRG has a relative weight that multiplies the hospital's base rate to determine payment. 470 has relative weight 1.8234. Major Complication or Comorbidity (MCC) and Complication or Comorbidity (CC) secondary diagnoses can move a case to a higher-paying DRG within the same family.
Frequently asked questions
What is MS-DRG 470?
Major Joint Replacement or Reattachment of Lower Extremity without MCC. TKA/THA without MCC. EXTREMELY HIGH VOLUME — most common surgical DRG.
What are typical indications?
Elective TKA; Elective THA.
Why are claims under this DRG denied?
Conservative therapy duration <6mo; BMI >40 step-therapy; K&L grade <3 imaging.
How do I appeal?
Document 6mo PT + NSAID failure, joint injection, K&L grade 3-4 on imaging, K-2008 outcome measures.
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