ZACHARY CHAK
NPI 1720958903
Chiropractor in San Francisco, CA
About Zachary Chak NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ZACHARY CHAK (NPI 1720958903) is an individual chiropractor in San Francisco, California, licensed in California (36682) and active in the NPI registry since November 2025. He is a graduate of Other (2023).
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
Zachary Chak 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 Reassignment
Medicare enrollment records show Zachary Chak reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
San Francisco, CA 94134
- 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.
Other Providers at the Same Location NPPES
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SAN FRANCISCO, CA 94134
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 Zachary Chak's NPI number?
The NPI number for Zachary Chak is 1720958903. It was assigned to this individual provider in the NPPES registry on November 11, 2025.
Where is Zachary Chak located?
Zachary Chak practices at 2633 San Bruno Ave, San Francisco, CA 94134. The listed phone number is (888) 500-1886.
What is Zachary Chak's specialty?
The primary specialty registered for this NPI is Chiropractor with taxonomy code 111N00000X.
Is Zachary Chak enrolled in Medicare?
Yes. Zachary Chak 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 organization bills Medicare for Zachary Chak's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Zachary Chak 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 Zachary Chak'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 Zachary Chak was last updated on November 11, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 months 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.
# Zachary Chak · NPI 1720958903
Chiropractor provider in San Francisco, California. Individual provider, active in the CMS NPPES registry since November 11, 2025.
## Identity
- **NPI:** 1720958903 (Entity type: Individual)
- **Enumerated:** November 11, 2025
- **Primary specialty:** Chiropractor · taxonomy 111N00000X
- **State license:** 36682 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 2633 SAN BRUNO AVE, San Francisco, CA 94134-1597
- **Phone:** (888) 500-1886
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Bills Medicare through:** North East Medical Services (NPI 1326279852, San Francisco, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2023
## Record status
- **NPPES last updated:** November 11, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1720958903) · Data from the CMS NPPES public registry.