Percentile Lengths of Hospital Stay for MSDRG

$79 / year

This dataset consists of a table containing Medicare Prospective Payment System Selected Percentile Lengths of Stay for the fiscal year 2017.


Section 1886(d) of the Social Security Act (the Act) sets forth a system of payment for the operating costs of acute care hospital inpatient stays under Medicare Part A (Hospital Insurance) based on prospectively set rates. This payment system is referred to as the inpatient prospective payment system (IPPS). Under the IPPS, each case is categorized into a diagnosis-related group (DRG). Each DRG has a payment weight assigned to it, based on the average resources used to treat Medicare patients in that DRG.

The base payment rate is divided into a labor-related and nonlabor share. The labor-related share is adjusted by the wage index applicable to the area where the hospital is located, and if the hospital is located in Alaska or Hawaii, the nonlabor share is adjusted by a cost of living adjustment factor. This base payment rate is multiplied by the DRG relative weight.

If the hospital treats a high-percentage of low-income patients, it receives a percentage add-on payment applied to the DRG-adjusted base payment rate. This add-on, known as the disproportionate share hospital (DSH) adjustment, provides for a percentage increase in Medicare payment for hospitals that qualify under either of two statutory formulas designed to identify hospitals that serve a disproportionate share of low-income patients. For qualifying hospitals, the amount of this adjustment may vary based on the outcome of the statutory calculation.

Also, if the hospital is an approved teaching hospital it receives a percentage add-on payment for each case paid through IPPS. This add-on known as the indirect medical education (IME) adjustment, varies depending on the ratio of residents-to-beds under the IPPS for operating costs, and according to the ratio of residents-to-average daily census under the IPPS for capital costs.

Finally, for particular cases that are unusually costly, known as outlier cases, the IPPS (Inpatient Prospective Payment System) payment is increased. This additional payment is designed to protect the hospital from large financial losses due to unusually expensive cases. Any outlier payment due is added to the DRG-adjusted base payment rate, plus any DSH or IME adjustments.

Date Created


Last Modified




Update Frequency


Temporal Coverage


Spatial Coverage

United States


Source License URL

John Snow Labs Standard License

Source License Requirements


Source Citation



Medicare Hospital, DRG Codes, APR DRG, DRG Codes 2018, DRG Codes Version 35, DRG Codes List, Medicare DRG List, Medicare DRG, CMS DRG Codes

Other Titles

Percentile Lengths of Medicare Hospital Stay for MS-DRGs V35, Percentile Lengths of Hospital Stay for MS-DRGs V35 CMS Capital

Fiscal_YearFiscal year in which the data is recordeddate-
Version_NumberMS-DRGs grouper version numberintegerenum : Array level : Nominal
Diagnosis_Related_Group_CodesMedicare severity diagnosis related group codesstringrequired : 1
Number_of_Acute_DischargesNumber of acute inpatient dischargesintegerrequired : 1 level : Ratio
Arithmetic_Mean_Length_of_Hospital_StayArithmetic Mean Length of stay in hospitalnumberrequired : 1 level : Ratio
Length_of_Stay_10_Percentile10th percentile of length of hospital stayintegerrequired : 1 level : Ratio
Length_of_Stay_25_Percentile25th percentile of length of hospital staynumberrequired : 1 level : Ratio
Length_of_Stay_50_Percentile50th percentile of length of hospital staynumberrequired : 1 level : Ratio
Length_of_Stay_75_Percentile75th percentile of length of hospital staynumberrequired : 1 level : Ratio
Length_of_Stay_90_Percentile90th percentile of length of hospital staynumberrequired : 1 level : Ratio