Specifications Manual for Joint Commission National Quality Measures (v2020A2)
Posted: 10/30/2019

Release Notes:
Measure Information Form
Version 2020A2

Measure Information Form

Measure Set: Total Hip and Total Knee Replacement Outpatient (THKR-OP)

Set Measure ID: THKR-OP-3

Set Measure ID Performance Measure Name
THKR-OP-3a Discharged to Home - Hip and Knee Overall
THKR-OP-3b Discharged to Home - Hip
THKR-OP-3c Discharged to Home - Knee

Performance Measure Name: Discharged to Home

Description: Patients discharged to home following total hip or total knee replacement.

Rationale: Home-based rehabilitation is increasingly utilized to reduce health-care costs; however, with a shorter hospital stay, the possibility arises for an increase in adverse clinical outcomes. Research has shown that despite concerns about early hospital discharge, there is no difference in pain, functional outcomes, or patient satisfaction between groups that received home-based rehabilitation versus inpatient rehabilitation. Home-based rehabilitation protocol following elective primary total hip or knee replacement is the more cost-effective strategy.1-2

According to 2012 Medicare claims data, 49% of patients undergoing hip and knee replacements were discharged to an inpatient rehabilitation facility (IRF) or skilled nursing facility (SNF) for rehabilitation. Therefore, only 51% of patients were discharged to home.

Type Of Measure: Process

Improvement Noted As: Increase in the rate

Numerator Statement: Patients who were discharged to home following total hip or total knee replacement.
Included Populations: Patients discharged to home with or without home health services, in-home physical therapy or outpatient physical therapy.

Excluded Populations: None

Data Elements:

Denominator Statement: Patients undergoing a total hip or total knee replacement.
Included Populations:
  • Patient with a CPT® Code with Modifier as defined in Appendix A, Table 14.01b (Total Hip Replacement-OP), or Table 14.02b (Total Knee Replacement-OP), or Table 14.03b (Bilateral Hip Replacements-OP), or Table 14.04b (Bilateral Knee Replacements-OP).

Excluded Populations:
  • Patients less than 18 years of age
  • Residents of Other Health Care Facility:
    • Extended or Intermediate Care Facility (ECF/ICF)
    • Long Term Acute Care Hospital (LTACH)
    • Nursing Home or Facility including Veteran’s Administration Nursing Facility
    • Psychiatric Hospital or Psychiatric Unit of a Hospital
    • Skilled Nursing Facility (SNF), Sub-Acute Care or Swing Bed
    • Veterans Home
  • Patients with a CPT® Code with Modifier as defined in Appendix A: Table 14.05b (partial hip and partial knee replacements-OP), or Table 14.06b (revision and resurfacing procedures-OP), or Table 14.07b (removal of implanted devices/prostheses-OP)
  • Patients with an ICD-10-CM Principal Diagnosis Code or ICD-10-CM Other Diagnosis Code as defined in Appendix A: Table 14.08 (Complication of Internal Fixation Device/Prosthesis), or Table 14.09 (malignant neoplasm of the pelvis, sacrum, coccyx, lower limbs, or bone/bone marrow or a disseminated malignant neoplasm), or Table 14.10 (femur, hip, pelvic fracture)
  • Patient expired
  • Patient left AMA
  • Physician/APN/PA/nurse/social worker/care manager/discharge planner/physical therapist/occupational therapist documentation of medical/social reason why patient cannot be discharged to home.

Data Elements:

Risk Adjustment: No.

Data Collection Approach: Retrospective data sources for required data elements include administrative data and medical records. Some hospitals may prefer to gather data concurrently by identifying patients in the population of interest. This approach provides opportunities for improvement at the point of care/service. However, complete documentation includes the principal or other ICD-10 diagnosis and CPT procedure codes, which require retrospective data entry.

Data Accuracy: Variation may exist in the assignment of ICD-10 and CPT codes; therefore, coding practices may require evaluation to ensure consistency.

Measure Analysis Suggestions: None

Sampling: Yes. Please refer to the measure set specific sampling requirements and for additional information see the Population and Sampling Specifications Section.

Data Reported As: Aggregate rate generated from count data reported as a proportion. Proportion for hip replacements, proportion for knee replacements and aggregated proportion for hip & knee replacements.

Selected References:
  • 1Mahomed NN, Davis AM, Hawker G, Badley E, Davey JR, Syed KA. et al. Inpatient compared with home-based rehabilitation following primary unilateral total hip or knee replacement: a randomized controlled trial. J Bone Joint Surg Am. 2008;90(8):1673–1680.
  • 2Padgett DE, et al. Study: Patients Who Go Home After Knee Replacement Do As Well as Those Discharged to Rehab Facility. Presented at: American Academy of Orthopaedic Surgeons Annual Meeting; March 24-28, 2015; Las Vegas.
  • Inpatient Rehabilitation Facility Services: Assessing payment adequacy and updating payments - Report to the Congress: Medicare Payment Policy March 2014
  • Mallinson TR, Bateman J, Tseng HY, Manheim L, et al. A Comparison of Discharge Functional Status After Rehabilitation in Skilled Nursing, Home Health, and Medical Rehabilitation Settings for Patients After Lower-Extremity Joint Replacement Surgery. Arch Phys Med Rehabil Vol 92, May 2011.
  • Fleischman A, Austin, M, Purtill JJ, Parvizi J, Hozack WJ, The Rothman Institute Study: Even if you live alone, there is no place like home after total joint arthroplasty. Presented at American Academy of Orthopaedic Surgeons Annual Meeting; March 14, 2017; San Diego, CA.
  • McLawhorn AS, Fu, MC, Schairer WW, Sculco PK, MacLeanCH,Padgett DE. Continued Inpatient Care After Primary Total Knee Arthroplasty Increases 30-Day Post-Discharge Complications: A Propensity Score-Adjusted Analysis. The Journal of Arthroplasty. January 31, 2017 (http://dx.doi.org/10.1016/j.arth.2017.01.039).
  • Ramos NL, Karia RJ, Hutzler LH, Brandt AM, Slover JD, Bosco JA. The effect of discharge disposition on 30-day readmission rates after total joint arthroplasty. J Arthroplasty. 2014 Apr;29(4):674-7. doi: 10.1016/j.arth.2013.09.010. Epub 2013 Oct 30.

Measure Algorithm:

Measure Information Form THKR-OP-3
CPT® only copyright 2019 American Medical Association. All rights reserved.
Specifications Manual for Joint Commission National Quality Measures (v2020A2)
Discharges 01-01-20 (1Q20) through 6-30-20 (2Q20)


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