RAY MAK
NPI 1972253292
Family Medicine in Oakland, CA
About Ray Mak NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
RAY MAK (NPI 1972253292) is an individual family medicine provider in Oakland, California, licensed in California (A190402) and active in the NPI registry since March 2022. He is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of Other (2022).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 2
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Ray Mak is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
3Medicare enrollment records show Ray Mak reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Oakland, CA 94607
- Reassigned Medicare billing, California enrollment
- 130 clinicians in this Medicare group
San Francisco, CA 94102
- Reassigned Medicare billing, California enrollment
- 76 clinicians in this Medicare group
Santa Rosa, CA 95407
- Reassigned Medicare billing, California enrollment
- 215 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94607 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Ray Mak's NPI number?
The NPI number for Ray Mak is 1972253292. It was assigned to this individual provider in the NPPES registry on March 28, 2022.
Where is Ray Mak located?
Ray Mak practices at 818 Webster St, Oakland, CA 94607. The listed phone number is (510) 986-6800.
What is Ray Mak's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is Ray Mak enrolled in Medicare?
Yes. Ray Mak is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Ray Mak's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Ray Mak reassigns Medicare benefits to 3 organizations: Asian Health Services (Oakland, CA), Healthright 360 (San Francisco, CA) and Santa Rosa Community Health Centers (Santa Rosa, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Ray Mak's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Ray Mak was last updated on September 10, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 51 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Ray Mak · NPI 1972253292
Family Medicine physician in Oakland, California. Individual provider, active in the CMS NPPES registry since March 28, 2022.
## Identity
- **NPI:** 1972253292 (Entity type: Individual)
- **Enumerated:** March 28, 2022
- **Primary specialty:** Family Medicine · taxonomy 207Q00000X
- **State license:** A190402 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 818 WEBSTER ST, Oakland, CA 94607-4220
- **Phone:** (510) 986-6800
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 3 organizations under Medicare reassignment (form CMS-855R): Asian Health Services (NPI 1841331402, Oakland, CA); Healthright 360 (NPI 1447279310, San Francisco, CA); Santa Rosa Community Health Centers (NPI 1871651273, Santa Rosa, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2022
## Record status
- **NPPES last updated:** September 10, 2026
---
Source: [NPI Profile](https://npiprofile.com/npi/1972253292) · Data from the CMS NPPES public registry.