# Optum Rx fax numbers for CalPERS Medicare drug requests

Find Optum Rx fax numbers in CalPERS Medicare materials for coverage determinations and Part D appeals.

Country: United States
Category: Healthcare
Last reviewed: 2026-10-04 (published sources, not a test transmission)

## Which Optum Rx fax number should I use?

A coverage determination asks the plan to cover a drug or grant an exception. A redetermination appeals a coverage decision already made. These numbers are published for the CalPERS Medicare material linked here; compare your own plan’s form before using them.

## Optum Rx: Part D appeal (redetermination)

Fax: +1 877 239 4565
E.164: +18772394565

Toll-free number; service and international charges may still apply.

Submit the complaint or appeal for the plan and request type named here.

Use only when: Published in CalPERS Medicare plan materials. Use only for the named request type and follow your plan’s current form; do not assume this is a fax for every Optum Rx plan.

[Optum Rx — form and contact instructions](https://contenthub-aem.optumrx.com/content/dam/contenthub/rx-assets/en/documents/clients/calpers/resources/Coverage-Redetermination-Appeals-Process.pdf) — reviewed 2026-10-04

## Optum Rx: coverage determination and prior authorization

Fax: +1 844 403 1028
E.164: +18444031028

Toll-free number; service and international charges may still apply.

Return the completed authorization required for this account or service.

Use only when: Published in CalPERS Medicare plan materials. Use only for the named request type and follow your plan’s current form; do not assume this is a fax for every Optum Rx plan.

[Optum Rx — form and contact instructions](https://contenthub-aem.optumrx.com/content/dam/contenthub/rx-assets/en/documents/clients/calpers/resources/Coverage-Determination.pdf) — reviewed 2026-10-04

## What to include in your fax to Optum Rx

For a coverage request, use the prior authorization or coverage form with the prescriber’s supporting information. For an appeal, identify the denial and explain why it should be reconsidered, with relevant evidence.

## Check the destination and prepare your cover page

Name the receiving department and the hospital, clinic or service involved. Add the document title, page count and a callback number. Put patient identifiers and authorization details in the fields the official form requests; a cover page does not replace signed consent.

Check the official source and recipient instructions before sending. A reviewed source confirms a published number, not live availability.

## Confirm delivery and follow up with Optum Rx

These are fax destinations, not voice support lines. Keep the transmission result and a copy of the documents. Confirm with the receiving department that the packet is complete and can be processed; a delivery receipt does not establish acceptance or a decision. Check with that department before sending a duplicate.

## How to fax Optum Rx without a fax machine

Prepare a legible PDF, verify the department and number, review the pages and authorize sending. DearFax supports [online sending](https://dearfax.com/send-fax-online) and workflows with [ChatGPT](https://dearfax.com/chatgpt) or [Codex](https://dearfax.com/codex) through [MCP](https://dearfax.com/mcp). Retain the transmission result.

Healthcare organizations should confirm their compliance requirements before selecting a fax service. DearFax does not currently offer HIPAA compliance.

## Frequently asked questions

### What Optum Rx fax number should I use?

Optum Rx: Part D appeal (redetermination): +1 877 239 4565. Optum Rx: coverage determination and prior authorization: +1 844 403 1028. A coverage determination asks the plan to cover a drug or grant an exception. A redetermination appeals a coverage decision already made. These numbers are published for the CalPERS Medicare material linked here; compare your own plan’s form before using them.

### Is Optum Rx prior authorization the same as an appeal?

No. Prior authorization or coverage determination seeks a coverage decision. A Part D appeal, also called redetermination, asks the plan to reconsider a decision. The listed faxes are different.

### What documents can I fax to Optum Rx?

For a coverage request, use the prior authorization or coverage form with the prescriber’s supporting information. For an appeal, identify the denial and explain why it should be reconsidered, with relevant evidence.

### What should I put on a fax cover page for Optum Rx?

Name the receiving department and the hospital, clinic or service involved. Add the document title, page count and a callback number. Put patient identifiers and authorization details in the fields the official form requests; a cover page does not replace signed consent.

### How can I fax Optum Rx without a fax machine?

Prepare your documents as a legible PDF and confirm the recipient’s submission requirements. You can use DearFax in your browser or prepare the fax with ChatGPT or Codex through MCP. Review the number and pages before authorizing the send, then keep the transmission result. Healthcare organizations should check their compliance requirements; DearFax does not currently offer HIPAA compliance.

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