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FIGURE
5-5

Clinical, functional, and service information from OASIS determines patients' home health case-mix classification

Clinical

Add the scores from each of these factors:

Primary home care diagnosis Stasis ulcer status
IV/infusion or
parenteral/enteral therapy
Surgical wound status
Vision limitation Shortness of breath
Pain Urinary incontinence
Wound/lesion Bowel incontinence
Multiple pressure ulcers Bowel ostomy
Most problematic
pressure ulcer stage
Behavioral problems

Clinical score

Min.
Low
Mod.
High

Functional

Add the scores from each of these factors:

Dressing Toileting Locomotion
Bathing Transferring

Functional score

Min.
Low
Mod.
High
Max

Service utilization

Add the scores from each of these factors:

No hospital discharge
past 14 days
IRF/SNF discharge
past 14 days
10 or more therapy visits

Service utilization score

Min.
Low
Mod.
High

Case-mix classification (80 groups)

Note: OASIS (Outcome and Assessment Information Set), IV (intravenous), IRF (inpatient rehabilitation facility), SNF (skilled nursing facility).

Source: CMS 2000c.

Small agencies could also have more difficulty with a PPS because it pays on the basis of averages. The greater the number of cases an agency has in a given case-mix group, the more likely the agency's average cost for that case-mix group will equal the national standard upon which the

payment for the case-mix group is based. If a small agency has only one or two cases in a given case-mix group, then the agency's average costs for that group will likely be higher or lower than the national standard. If agencies do not have enough patients with lower-than-average costs in

MEDPAC

Report to the Congress: Issues in a modernized Medicare program | June 2005 127