Prior Authorization for Treatment

Prior Authorization List

Prior Authorization Request Form

HPSM has revised the Prior Authorization Request Form and will no longer accept submissions of the old form starting January 1, 2021. Please alert your staff of this revised form and timeline. If you have any questions about this update please contact the HPSM Provider Services Department.

Prior authorization is based on medical necessity and is not a guarantee of coverage or eligibility. If a service is not included on this list, the service does not require prior authorization. However, this does not mean it is a covered benefit.

Only valid codes will be reviewed. Please refer to CMS/MC guidelines to verify validity. Codes are updated regularly and posted below.

It is expected that all services requiring prior authorization must be authorized before providing the service, with the exception of services that are necessary on an emergent or truly urgent basis. For authorization requests submitted prior to the date of service, expect a response from HPSM within:

  • 72 hours for urgent or expedited authorization requests
  • Five business days for routine authorization requests

Before submitting a request, search HPSM's Prior Authorization List by CPT code or service name to see if you need to get prior authorization:

Download the Prior Authorization Required List: PDF | Excel file

List Updated 4/14/2021

The HPSM Prior Authorization Required List states which service codes require prior authorization. Services not listed here do not require prior authorization. For services on this list, complete the Prior Authorization Request Form and fax it to HPSM at 650-829-2079.

Prior Authorization Request Form

Your PAR will be rejected if you submit:

  • An outdated version of the form
  • An incomplete form
  • Inaccurate information
  • A form filled out in handwriting
  • A PAR with multiple patients’ information

HPSM recommends adjusting your fax machine settings to the highest quality possible, and double-checking the member ID number before sending. If you have any questions about the PAR, please call Provider Services at 650-616-2106 or consult the Prior Authorization Request Form User Guide.

Prior Authorization List Changes

HPSM periodically updates our list of codes requiring prior authorization to reflect current clinical guidelines. You can review these changes or archived lists on the PAR List Changes page.

Read our provider notification on the new code changes here: Prior Authorization and Covered Services Changes Effective 4/14/2021

Authorization Fax Numbers

HPSM has several direct fax lines dedicated to specific form submissions:

In-patient admissions with facesheet for all lines of business (including in-patient retros and corrections): 


In-patient admissions, clinicals only (without facesheet)


Out-patient retro authorizations and corrections


PCP referrals for Behavioral Health and Recovery Services


Pharmacy authorizations and modifications to formulary


CBAS and MSSP referrals, Care Coordination


When including clinicals:
  • Place the facesheet before any clinical information
  • Do not submit observation requests: observation status is direct billable
  • Do not submit requests for services delivered in the emergency room: these are direct billable