KELVIN KWOK MAK O.D.
NPI 1376633883
Optometrist in San Francisco, CA
About Kelvin Kwok Mak O.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
KELVIN KWOK MAK O.D. (NPI 1376633883) is an individual optometrist in San Francisco, California, licensed in California (6286) and active in the NPI registry since October 2006. He is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Kelvin Kwok Mak O.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Kelvin Mak reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
San Francisco, CA 94133
- Reassigned Medicare billing, California enrollment
- 176 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 94133 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.
SAN FRANCISCO, CA 94133
SAN FRANCISCO, CA 94133
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 Kelvin Mak's NPI number?
The NPI number for Kelvin Mak is 1376633883. It was assigned to this individual provider in the NPPES registry on October 13, 2006.
Where is Kelvin Mak located?
Kelvin Mak practices at 1520 Stockton St, San Francisco, CA 94133. The listed phone number is (415) 391-9686.
What is Kelvin Mak's specialty?
The primary specialty registered for this NPI is Optometrist with taxonomy code 152W00000X.
Is Kelvin Mak enrolled in Medicare?
Yes. Kelvin Mak is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Kelvin Mak's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Kelvin Mak reassigns Medicare benefits to North East Medical Services (San Francisco, CA). The 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 Kelvin Mak's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Kelvin Mak accept?
Health plans from Anthem Blue Cross and Blue Shield, Blue Cross Blue Shield of Wyoming and Blue Cross and Blue Shield of Louisiana list Kelvin Mak as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Kelvin Mak was last updated on January 17, 2017. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 years 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.
# Kelvin Kwok Mak, O.D. · NPI 1376633883
Optometrist provider in San Francisco, California. Individual provider, active in the CMS NPPES registry since October 13, 2006.
## Identity
- **NPI:** 1376633883 (Entity type: Individual)
- **Enumerated:** October 13, 2006
- **Primary specialty:** Optometrist · taxonomy 152W00000X
- **State license:** 6286 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 1520 STOCKTON ST, San Francisco, CA 94133-3354
- **Phone:** (415) 391-9686
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health
- **Bills Medicare through:** North East Medical Services (NPI 1518911304, San Francisco, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** January 17, 2017
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Source: [NPI Profile](https://npiprofile.com/npi/1376633883) · Data from the CMS NPPES public registry.