Karen Frei, MD

Neurology · Faculty Physicians and Surgeons of Llusm

NeurologyHigh data-match confidence

Directory record — please verify

This listing comes from CMS Medicare Doctors and Clinicians data and was updated September 8, 2026. It does not confirm Medicare coverage, plan network, referral or prior authorization, offered services, or current availability. Verify each item directly before scheduling.

At a glance

Karen Frei, MD is listed under Neurology in Rancho Cucamonga, CA. Request their contact details below to confirm current participation and availability.

Request an appointment with Karen Frei, MD

Send a request to the Covered Paincare team about this provider. An appointment is not booked until confirmed.

Services & care categories

Neurology Accepts Medicare assignment Telehealth available

Medicare questions to ask

1Do you currently accept Medicare assignment for these services?
2Is this location in-network for my Medicare Advantage plan?
3Will I need a referral or prior authorization before my visit?
4What out-of-pocket costs should I expect under Medicare?
5Do you provide the specific care I need (pain management, PM&R, behavioral health, or mild TBI)?

Location

Frequently asked questions

Does Karen Frei, MD accept Medicare?

Karen Frei, MD is an imported senior-care record. Confirm Medicare participation and network status directly with the facility before scheduling.

Where is Karen Frei, MD located?

Karen Frei, MD is located at 8599 Haven Ave, Suite 102and210, Rancho Cucamonga, CA 91730.

What care does Karen Frei, MD offer?

Listed services include Neurology, Accepts Medicare assignment, Telehealth available. Verify availability with the facility.

Source

CMS Medicare Doctors and Clinicians data.

How directory records are sourced and updated

Request an appointment with Karen Frei, MD

Send a request to the Covered Paincare team about this provider. An appointment is not booked until confirmed.

Medicare questions to ask

1Do you currently accept Medicare assignment for these services?
2Is this location in-network for my Medicare Advantage plan?
3Will I need a referral or prior authorization before my visit?
4What out-of-pocket costs should I expect under Medicare?
5Do you provide the specific care I need (pain management, PM&R, behavioral health, or mild TBI)?

Location

Frequently asked questions

Does Karen Frei, MD accept Medicare?

Karen Frei, MD is an imported senior-care record. Confirm Medicare participation and network status directly with the facility before scheduling.

Where is Karen Frei, MD located?

Karen Frei, MD is located at 8599 Haven Ave, Suite 102and210, Rancho Cucamonga, CA 91730.

What care does Karen Frei, MD offer?

Listed services include Neurology, Accepts Medicare assignment, Telehealth available. Verify availability with the facility.