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California Medicare Case Review

As the Quality Improvement Organization (QIO) for California, HSAG is responsible for monitoring physician acknowledgement statements for hospitals. Because hospitals are paid under the prospective payment system based on the physician's diagnoses, all newly credentialed physicians must sign and file a statement prior to his/her first admission to the hospital or first claim submission.

Click here to review how to request an authorization and to download the authorization request for for using an assistant at cataract procedures.

Click here to review the Quality Screens HSAG uses to improve care for the Surgical Care Improvement Project, pneumonia, heart failure, and acute myocardial infarction.


California Providers Medicare Appeals

Your Quality Improvement Organization:

Health Services Advisory Group, Inc. (HSAG) was founded in 1979 by a group of medical professionals whose goal was to make a difference in the quality of health care. The Centers for Medicare & Medicaid Services has selected HSAG to be its QIO for California.

HSAG handles appeals for beneficiaries who have traditional, fee-for-service Medicare, or Medicare Advantage. Click on the appropriate link below for information regarding these Medicare appeal benefits:


For additional provider information regarding
  • Appeals
  • Higher Weighted DRG
  • Beneficiary Complaints
  • Validation Assistance
  • Annual Payment Update
  • QualityNet Access
Or all other Case Review Inquiries please call

HSAG California QIO Provider Line:

1-866-800-8750


HSAG California QIO Provider Fax Line:

1-866-800-8757

Available 24 hours a day, seven days a week.

HSAG values your feedback on the services we provide to you. If you have any questions or concerns regarding the customer service that you have received, please call:

Zak Henshaw MHA, MPH, MLIS
Chief Planning Officer
1-813-865-3541



Requested records should be mailed to:

Health Services Advisory Group, Inc.
Attn: Beneficiary Protection
5201 W. Kennedy Boulevard Suite 900
Tampa, Florida 33609-1822


For information relating to HSAG's hospital, nursing home, or physician office quality improvement projects in California, call 818-409-9206.

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URAC General Services Administration (GSA) NCQA: National Committee for Quality Assurance Maximus