DR. SUNNY PAK M.D.
NPI 1891980165
Family Medicine in San Francisco, CA
About Dr. Sunny Pak M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. SUNNY PAK M.D. (NPI 1891980165) is an individual family medicine provider in San Francisco, California, licensed in California (A113552) and active in the NPI registry since September 2007. He is enrolled in Medicare PECOS and is a graduate of University Of California, Davis School Of Medicine (2009).
NPPES Registry Identity
Specialties & Licenses
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
Dr. Sunny Pak M.d. 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
2Medicare enrollment records show Sunny Pak reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
San Francisco, CA 94133
- Reassigned Medicare billing, California enrollment
- 1,573 clinicians in this Medicare group
San Francisco, CA 94110
- Reassigned Medicare billing, California enrollment
- 842 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.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Referred Medical Equipment & Supplies CMS DME claims 3
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
Other Providers at the Same Location NPPES 19
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Sunny Pak's NPI number?
The NPI number for Sunny Pak is 1891980165. It was assigned to this individual provider in the NPPES registry on September 10, 2007.
Where is Sunny Pak located?
Sunny Pak practices at 1490 Mason St, San Francisco, CA 94133. The listed phone number is (415) 364-7600.
What is Sunny Pak's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is Sunny Pak enrolled in Medicare?
Yes. Sunny Pak 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 Sunny Pak's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Sunny Pak reassigns Medicare benefits to 2 organizations: City & County Of San Francisco (San Francisco, CA) and University Of California Sfgh Medical Group (San Francisco, 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 Sunny Pak'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 Sunny Pak was last updated on August 28, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.
# Dr. Sunny Pak, M.D. · NPI 1891980165
Family Medicine physician in San Francisco, California. Individual provider, active in the CMS NPPES registry since September 10, 2007.
## Identity
- **NPI:** 1891980165 (Entity type: Individual)
- **Enumerated:** September 10, 2007
- **Primary specialty:** Family Medicine · taxonomy 207Q00000X
- **State license:** A113552 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 1490 MASON ST, San Francisco, CA 94133-4222
- **Phone:** (415) 364-7600
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): City & County Of San Francisco (NPI 1144263518, San Francisco, CA); University Of California Sfgh Medical Group (NPI 1174598296, San Francisco, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of California, Davis School Of Medicine, class of 2009
## Record status
- **NPPES last updated:** August 28, 2013
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Source: [NPI Profile](https://npiprofile.com/npi/1891980165) · Data from the CMS NPPES public registry.