Zachary Chak
NPI 1720958903 · Chiropractor · San Francisco, CA
Enrolled with Medicare as Practitioner - Chiropractic · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Zachary Chak is a Chiropractor provider in San Francisco, CA (NPI 1720958903).
Provider details
- NPI number
- 1720958903
- Entity type
- Individual
- Primary specialty
- ChiropractorChiropractic Providers
- Sex
- Male
- Sole proprietor
- No
- License
- 36682 (CA)
Specialties & taxonomies
Chiropractic Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
Under 1 yr in registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2025-11-11
- Last updated
- 2025-11-11
- Certified
- 2025-11-11
Frequently asked questions
- What is Zachary Chak's NPI number?
- Zachary Chak's National Provider Identifier (NPI) is 1720958903, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Zachary Chak's specialty?
- Zachary Chak is listed in the NPPES registry with a primary specialty of Chiropractor (Chiropractic Providers).
- Where is Zachary Chak located?
- Zachary Chak's practice location on file with NPPES is 2633 San Bruno Ave, San Francisco, CA 94134-1597.
- What is Zachary Chak's phone number?
- The practice phone number listed in the NPPES registry for Zachary Chak is (888) 500-1886.
- Does Zachary Chak accept Medicare?
- Zachary Chak is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Zachary Chak's NPI active?
- Yes — Zachary Chak's NPI (1720958903) is active in the NPPES registry as of the last update on 2025-11-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.