From the public record · not a Soft Home Global client
Inpatient rehabilitation documentation: what OIG found at Lake Hospital System
Records must show the patient needed and could take part in intensive multidisciplinary therapy under physician supervision. At Lake Hospital System, OIG found 38 of 90 sampled inpatient claims billed as inpatient rehabilitation did not meet Medicare's criteria or documentation requirements, producing $798,533 of the $862,429 in sampled overpayments.
This is a summary of a published audit by the HHS Office of Inspector General. Lake Hospital System is not a client of Soft Home Global, and Soft Home Global had no part in the audit. Every figure is quoted from the report, which is linked below — read it rather than rely on this page. Where Lake Hospital System disputed a finding, that is shown too: these are audit findings, not a court’s verdict.
The audit
What went wrong, claim type by claim type
Inpatient rehabilitation facility claims
38 of 90 inpatient claims · $798,533
Thirty-five stays did not meet Medicare criteria for acute inpatient rehabilitation, and twelve did not comply with Medicare documentation requirements (some claims had both problems).
Why, per the report: The Hospital disagreed with 26 of the 38 and agreed to refund the other 12.
Billed as inpatient instead of outpatient or observation
9 of 90 inpatient claims · $61,523
Stays did not meet Medicare criteria for inpatient status and should have been billed as outpatient or outpatient with observation.
Why, per the report: The Hospital disagreed with 7 of the 9 and agreed to refund the other 2.
Procedure or diagnosis codes not supported
4 of 90 inpatient claims · $2,373 (net)
Certain procedure or diagnosis codes were not supported by the medical records; three produced overpayments and one an underpayment.
Why, per the report: The Hospital contended the claims met requirements and that OIG did not review specific documentation.
How it was to be resolved
OIG recommended that Lake Hospital System:
- Refund the estimated overpayments within the 4-year reopening period
- Exercise reasonable diligence to identify, report and return overpayments under the 60-day rule
- Strengthen controls to ensure full compliance with Medicare requirements
What Lake Hospital System said: The Hospital disagreed with the "vast majority" of findings, supported by an independent contracted reviewer, agreed to voluntarily refund the 14 claims it did agree with, and concurred with the 60-day-rule recommendation.
What a practice or billing team can take from it
These points are Soft Home Global’s reading of the report, not OIG’s words.
- For inpatient rehabilitation, the record has to show the patient could actually participate in and benefit from intensive therapy — not only that therapy was ordered.
- Inpatient versus observation is decided by what the physician documented at admission, not by how long the stay turned out to be.
- When a hospital and an auditor read the same chart differently, the chart was not clear enough. Documentation is the only defence that survives review.
Questions
What documentation does Medicare require for inpatient rehabilitation facility claims?
Records must show the patient needed and could take part in intensive multidisciplinary therapy under physician supervision. At Lake Hospital System, OIG found 38 of 90 sampled inpatient claims billed as inpatient rehabilitation did not meet Medicare's criteria or documentation requirements, producing $798,533 of the $862,429 in sampled overpayments.
Is Lake Hospital System a Soft Home Global client?
No. This page summarises a public audit report published by the HHS Office of Inspector General (report A-05-19-00024, issued June 2021). Soft Home Global had no involvement with Lake Hospital System or with the audit.
Did Lake Hospital System agree with the findings?
The Hospital disagreed with the "vast majority" of findings, supported by an independent contracted reviewer, agreed to voluntarily refund the 14 claims it did agree with, and concurred with the 60-day-rule recommendation.
Source
Figures read from the report on 15 September 2026.
Next step
Would your claims pass the same review?
Send a ninety-day denial report and an aged AR summary, with no patient identifiers. Within two working days you get a written summary of which denial reasons are costing you most and what is recoverable.
Or write to ops@softhomeglobal.com