US · guidance
CMS Pub. 100-04, ch. 3, § 140.2.5.2
Rural Adjustment
Payments are adjusted for facilities located in rural areas. A facility is considered to be
a rural IRF if they are located in a non-urban area.
For FY 2006 and FY 2007, a hold harmless policy applies to IRFs that meet the
definition of rural in FY 2005 in §412.602 and become urban under the FY 2006 CBSA-based designations. The IRFs that meet the criteria described in the previous sentence
will qualify for an adjustment to their payments in FY 2006 and FY 2007 equal to some
portion of the 19.14 percent rural adjustment effective in FY 2005. This adjustment is in
addition to the one-year blended wage index described above for discharges occurring on
or after October 1, 2005 and on or before September 30, 2006.
140.2.5.3 - Low-Income Patient (LIP) Adjustment: The Supplemental
Security Income (SSI)/Medicare Beneficiary Data for Inpatient
Rehabilitation Facilities (IRFs) Paid Under the Prospective Payment
System (PPS)
(Rev. 2673, Issued: 03-14-13, Effective: 04-22-13, Implementation: 04-22-13)
The LIP adjustment accounts for differences in costs among IRFs associated with
differences in the proportion of low-income patients treated. The LIP adjustment is
calculated as (1 + disproportionate share hospital (DSH) patient percentage) raised to a
power specified in the most recent IRF PPS final rule published in the Federal
Register. To compute the DSH patient percentage the following formula is used:
DSH = Medicare SSI Days + Medicaid, Non-Medicare Days
Total Medicare Days Total Days
This instruction provides the data for determining additional payment amounts for IRFs
with low-income patients. An SSI data file below shows the latest available IRF-specific
data to compute an IRF's SSI ratio for the associated specified fiscal year (FY). An IRF
may use this ratio as part of the formula to estimate their LIP adjustment for a cost
reporting period that begins subsequent to the FY specified by the data file. As
appropriate, a file will be updated annually (usually each October/November).
Patients who are enrolled in Medicare Advantage (administered through Medicare Part
C) should also be included in the Medicare fraction. These days will be included in the
Medicare/SSI fraction, but in order for them to be counted, the hospital must submit an
informational only bill (TOB 111), which includes both Condition Code 04 and the CMG
code from the IRF PAI, to their Medicare contractor. This will ensure that these days are
included in the IRF’s SSI ratio for Fiscal Year 2007 and beyond. Teaching IRFs do not
have to submit an additional bill with Condition Code 04. They already submit bills with
Condition Codes 04 and 69 for Indirect Medical Education payments and CMS will use
the information from these bills for the SSI ratio.
IRFs that received LIP payments during FY 2006 are also required to
submit informational only bills for their Medicare Advantage patients.
Informational Only Claim Elements:
• Covered 111 TOB
• Condition Code 04
• Medicare Fee-for-Service is the primary payer
• There is no MSP
• Beneficiary’s Medicare HICN
• For claims prior to October 1, 2011, report the Revenue Code 0024 line
containing CMG A9999 and, instead of inputting the transmission date of the
IRF-PAI in the service date field (as is required for FFS claims), input the
discharge date as a default for these informational only claims. The discharge date
is required on informational only claims to reduce reporting burden for IRFs who
may be submitting “old” informational only claims.
NOTE: Effective January 1, 2011, do not report the service date for the revenue code 0024
line. Instead, use occurrence code 50 in place of the service date to report the default
discharge date for informational only claims.
• Effective October 1, 2011, report the Revenue Code 0024 line containing the CMG
from the IRF-PAI and the transmission date of the IRF-PAI in the occurrence code
50 and date field (as is required for FFS claims).
• All other required claim elements
The SSI/Medicare beneficiary data for IRF PPS is available to A/B MACs (A)
electronically and contains the name of the facility, provider number, SSI days, covered
Medicare days, and the ratio of Medicare Part A patient days attributable to SSI
recipients. A/B MACs (A) will use this information to update their provider specific file.
The files are located at the following CMS Web site address:
http://www.cms.gov/Medicare/Medicare-Fee-for-Service-
Payment/ProspMedicareFeeSvcPmtGen/index.html. Select Inpatient Rehabilitation
Facility PPS, then select, from the list at the left, SSI Data.
A/B MACs (A) use this data to determine an initial PPS payment amount, and if
applicable, to determine a final outlier payment amount for IRFs whose discharges are
during a specific cost reporting period. A/B MACs (A) make a determination of the
amount of this percentage to compute the final LIP adjustment which allows the year-end
settlement of a facility’s cost report. When the A/B MAC (A) settles a cost report for a
specific fiscal year, that settled cost report will determine the final SSI ratio that is
associated with that cost report. The A/B MAC (A) uses the most recently settled SSI
ratio to settle the current cost report. Once the final SSI ratio is determined for the actual
fiscal year the cost report corresponds to, a retrospective adjustment may be made to
account for the difference between the actual lip adjustment amount and the initial PPS
lip adjustment payment amount.
A - Clarification of Allowable Medicaid Days in Calculating the Disproportionate
Share Variable
Background
Under the IRF PPS, facilities receive additional payment amounts to account for the cost
of furnishing care to low-income patients. This is done by making adjustments to the
prospective payment rate. Under §1886(d)(5)(F) of the Act, the Medicare DSH
percentage is made up of two computations. The results of these two computations are
added together to determine the DSH percentage. First, the patient days of patients who,
during a given month, were entitled to both Medicare Part A and SSI (excluding those
patients who received only State supplementation) is divided by the number of covered
patient days utilized by patients under Medicare Part A for that same period. Second, a
determination is made regarding the patient days associated with beneficiaries who were
eligible for medical assistance (Medicaid) under a State plan approved under Title XIX
but who were not entitled to Medicare Part A (See 42 CFR 412.106(b)(4)) is determined.
This number is divided by the total number of patient days for that same period. The SSI
data is updated on an annual basis and these data are one of the components used to
determine the DSH variable that is part of the appropriate LIP adjustment for each IRF.
Included Days
In calculating the number of Medicaid days, the hospital must determine whether the
patient was eligible for Medicaid under a State plan approved under Title XIX on the day
of service. If the patient was so eligible, the day counts in the Medicare disproportionate
share adjustment calculation. The statutory formula for "Medicaid days" reflects several
key concepts. First, the focus is on the patient's eligibility for Medicaid benefits as
determined by the State, not the hospital's "eligibility" for some form of Medicaid
payment. Second, the focus is on the patient's eligibility for medical assistance under an
approved Title XIX State plan, not the patient's eligibility for general assistance under a
State-only program. Third, the focus is on eligibility for medical assistance under an
approved Title XIX State plan, not medical assistance under a State-only program or other
program. Thus, for a day to be counted, the patient must be eligible on that day for
medical assistance benefits under the Federal-State cooperative program known as
Medicaid (under an approved Title XIX State plan). In other words, for purposes of the
Medicare disproportionate share adjustment calculation, the term "Medicaid days" refers
to days on which the patient is eligible for medical assistance benefits under an approved
Title XIX State plan. The term "Medicaid days" does not refer to all days that have some
relation to the Medicaid program, through a matching payment or otherwise; if a patient is
not eligible for medical assistance benefits under an approved Title XIX State plan, the
patient day cannot become a "Medicaid day" simply by virtue of some other association
with the Medicaid program.
Medicaid days, for purposes of the Medicare disproportionate share adjustment
calculation, include all days during which a patient is eligible, under a State plan approved
under Title XIX, for Medicaid benefits, even if Medicaid did not make payment for any
services. Thus, Medicaid days include, but are not limited to, days that are determined to
be medically necessary but for which payment is denied by Medicaid because the provider
did not bill timely, days that are beyond the number of days for which a State will pay,
days that are utilized by a Medicaid beneficiary prior to an admission approval but for
which a valid enrollment is determined within the prescribed period, and days for which
payment is made by a third party. In addition, CMS recognizes the calculation days that
are utilized by a Medicaid beneficiary who is eligible for Medicaid under a State plan
approved under Title XIX through a managed care organization (MCO) or health
maintenance organization (HMO). However, in accordance with 42 CFR 412.106(b)(4), a
day does not count in the Medicare disproportionate share adjustment calculation if the
patient was entitled to both Medicare Part A and Medicaid on that day. Therefore, once
the eligibility of the patient for Medicaid under a State plan approved under Title XIX has
been verified, the A/B MAC (A) must determine whether any of the days are dual
entitlement days and, to the extent that they are, subtract them from the other days in the
calculation.
Excluded Days
Many States operate programs that include both State-only and Federal-State eligibility
groups in an integrated program. For example, some States provide medical assistance to
beneficiaries of State-funded income support programs. These beneficiaries, however, are
not eligible for Medicaid under a State plan approved under Title XIX, and, therefore,
days utilized by these beneficiaries do not count in the Medicare disproportionate share
adjustment calculation. If a hospital is unable to distinguish between Medicaid
beneficiaries and other medical assistance beneficiaries, then it must contact the State for
assistance in doing so.
In addition, if a given patient day affects the level of Medicaid DSH payments to
the hospital but the patient is not eligible for Medicaid under a State plan approved
under Title XIX on that day, the day is not included in the Medicare DSH
calculation.
It should be noted that the types of days discussed above are not necessarily the
only types of excluded days. See the chart below, which summarizes some, but
not necessarily all, of the types of days to be excluded from (or included in) the
Medicare DSH adjustment calculation.
To provide consistency in both components of the calculation, any days that are
added to the Medicaid day count must also be added to the total day count, to the
extent that they have not been previously so added.
Regardless of the type of allowable Medicaid day, the hospital bears the burden
of proof and must verify with the State that the patient was eligible under one of
the allowable categories during each day of the patient's stay. The hospital is
responsible for and must provide adequate documentation to substantiate the
number of Medicaid days claimed. Days for patients that cannot be verified by
State records to have fallen within a period wherein the patient was eligible for
Medicaid cannot be counted.
Types of Days Included/Excluded in the Medicare DSH Adjustment Calculation
Type of Day Description Eligible
Title XIX
Day
General
Assistance
Patient Days
Days for patients covered under a State-only (or county-only) general
assistance program (whether or not any payment is available for health
care services under the program). These patients are not Medicaid-eligible under the State plan
No
Other State-Only Health
Program Patient
Days
Days for patients covered under a State-only health program. These
patients are not Medicaid-eligible under the State plan
No
Charity Care
Patient Days
Days for patients not eligible for Medicaid or any other third-party payer,
and claimed as uncompensated care by a hospital. These patients are not
Medicaid-eligible under the State plan.
No
Actual 1902(r)(2)
and 1931(b)
Days
Days for patients eligible under a State plan based on a 1902(r)(2) or
1931(b) election. The se patients are Medicaid-eligible under the Title
XIX State plan under the authority of these provisions, which is exercised
by the State in the context of the approved State plan.
Yes
Type of Day Description Eligible
Title XIX
Day
Medicaid
Optional
Targeted Low-Income
Children
(CHIP-related)
Days
Days for patients who are Title XIX-eligible and who meet the definition
of "optional ta rgeted low -income children" under §1905(u)(2). T he
difference b etween the se children and othe r Title XIX children is the
enhanced FMAP rate available to the State. Th ese children are fully
Medicaid-eligible under the State plan.
Yes
Separate CHIP
Days
Days for patients who are eligible for benefits under a non-Medicaid
State program furnishing child health assistance to targeted low-income
children. These children are, by definition, not Medicaid-eligible under
No.
History
(Rev. 2673, Issued: 03-14-13, Effective: 04-22-13, Implementation: 04-22-13)
Provenance
- Source
- cms.gov
- Retrieved
- 2026-08-25
- Edition
- iom-2026-08-25
- Content hash
441178964c3ca5a09e5c6085ed157cb155de6476da5fd095a218f50c244e5086
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