Transfer Adjustments & Relative Weights
Key Takeaways
- MS-DRG relative weights reflect average resource use; hospitals multiply weight by standardized base rate for operating payment.
- Early transfer to another acute IPPS hospital often triggers partial per-diem payment rather than full DRG to the first hospital.
- Discharge status code 02 signals transfer and affects transfer adjustment policy on the claim.
- Transfer policy changes payment split—it does not usually change the assigned MS-DRG or its weight.
- CIC tests conceptual partial payment on transfer—not manual per-diem calculations.
Quick Answer: Transfer adjustments pay the first hospital a partial MS-DRG amount (often per-diem) when a patient moves to another acute IPPS hospital or certain post-acute settings before a full discharge. Relative weights set the DRG rate; transfer policy splits it.
Transfer Adjustments and Relative Weights
MS-DRG relative weights express average resource use for a clinical group nationwide. Transfer policies modify how much of that weight the first hospital keeps when a patient leaves early to another facility. CIC payment items combine both concepts—especially in stems mentioning discharge status 02 (transfer to short-term hospital) or post-acute transfer within prescribed day thresholds.
Relative Weight Fundamentals
Each MS-DRG publishes a relative weight in the IPPS final rule tables. Hospitals multiply weight × standardized base rate (adjusted for wage index, DSH, IME, etc.) to estimate operating payment. Weights change annually when CMS recalibrates costs, adds DRGs, or shifts CC/MCC definitions.
| Concept | Coder impact |
|---|---|
| Higher weight DRG | Usually more CC/MCC severity or surgical path |
| Weight unchanged | Coding change did not affect grouper tier |
| Weight downgrade on audit | Removed MCC, PCS, or corrected PDX |
CIC asks direction (higher/lower/same), not decimal-weight math.
What Triggers Transfer Logic
Medicare transfer policy applies when:
- Patient transfers to another acute-care IPPS hospital (common discharge status 02)
- Transfer to certain post-acute providers (SNF, HHA, IRF, LTCH, etc.) within defined windows
- Stay is less than full DRG length threshold for that MS-DRG
The first hospital may receive:
- Per-diem payment for early days + transfer adjusted DRG portion, or
- Full DRG if stay exceeds threshold (varies by DRG transfer class)
Exact formulas are finance-team territory; CIC tests conceptual outcomes.
Transfer DRG Classes
CMS assigns MS-DRGs to transfer categories (e.g., surgical DRGs with/without transfer per diem). Some DRGs are exempt from transfer adjustment and always pay full weight regardless of early transfer—high-cost surgical DRGs often behave differently than medical DRGs.
Scenario: Pneumonia medical DRG, 2-day stay, transfer to another acute hospital. Stem may ask whether first hospital receives full MS-DRG payment—often no, transfer per-diem applies.
Discharge Status Codes and Payment
Discharge disposition on UB-04 Field 17 signals transfer:
| Code | Meaning | Payment relevance |
|---|---|---|
| 01 | Home/self-care | Standard full DRG if no other rules |
| 02 | Another short-term hospital | Transfer adjustment likely |
| 03 | SNF | Post-acute transfer rules |
| 62 | IRF | May shift site-of-care payment |
| 63 | LTCH | LTCH admission separate PPS |
Coders must code accurate discharge status from documentation; incorrect status misstates transfer policy on the claim.
Post-Acute Transfer Windows
When transfer occurs within prescribed days after admission, IPPS may pay only a fraction of the DRG to the discharging hospital and assign remaining value to the receiving setting's PPS. CIC items rarely cite day counts—they ask whether transfer adjustment is conceptually applicable.
Trap: Full MS-DRG to transferring hospital when stem explicitly states transfer on day 2 to acute hospital—eliminate full-payment answers.
Relative Weight vs Transfer Adjustment Interaction
Transfer policy does not change the assigned MS-DRG or its weight on the claim—it changes how much money flows to the first hospital. Grouper still outputs DRG 193 (example) with weight 1.2; payer edits apply transfer math.
Auditors review:
- Correct DRG from codes
- Correct discharge status
- Appropriate transfer payment vs full DRG
Outliers and Transfers
Cost outliers add payment when stay costs exceed threshold. Transfer cases can still qualify for outliers in some circumstances, but CIC depth is awareness only. Do not assume outlier automatically overrides transfer per-diem without stem support.
Coding Accuracy Still Matters
Transfer payment disputes often start with wrong PDX or missing PCS changing DRG family entirely. A transfer case coded as lower-weight medical DRG when surgical PCS supported costs the hospital more than transfer math—it loses both severity and per-diem nuance.
Worked Comparison
Case A: COPD exacerbation, 6 days, home discharge. Full MS-DRG weight paid (subject to sequestration/HAC).
Case B: Same DRG, 2 days, transfer to acute hospital day 2. Transfer-adjusted payment to first hospital; receiving hospital bills new admission.
Coder role identical: accurate codes + discharge status. Payment operations applies transfer table.
Medicaid and Commercial Variation
State Medicaid may not mirror Medicare transfer rules. Commercial contracts sometimes pay per diem for all stays. CIC stems label Medicare IPPS when transfer rules apply—read carefully.
Exam Algorithm
- Identify MS-DRG from codes (weight concept).
- Read length of stay and discharge status.
- If early transfer to acute/post-acute per stem → expect partial payment language.
- Eliminate answers granting full DRG to transferring hospital unless stem supports threshold met.
Trap Summary
| Trap | Reality |
|---|---|
| Transfer changes DRG assignment | Usually payment split only |
| Any transfer always per-diem | Thresholds and DRG class matter |
| Discharge status is cosmetic | Drives transfer edits |
| Relative weight equals hospital charges | Weight × base rate, not chargemaster |
Transfer adjustments reward coders who understand claim lifecycle beyond code selection—critical for CIC payment methodology mastery.
When a patient transfers early to another acute-care IPPS hospital, the first hospital's Medicare payment is most likely:
A change in coded secondary diagnoses that adds a valid POA=Y MCC most likely affects:
Discharge status on the UB-04 primarily helps payers determine: