Kwok Internal Medicine a Medical Corporation
NPI 1649667072 · Internal Medicine Physician · San Anselmo, CA
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Kwok Internal Medicine a Medical Corporation is a Internal Medicine Physician organization in San Anselmo, CA (NPI 1649667072).
Provider details
- NPI number
- 1649667072
- Entity type
- Organization
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Michael Kwok, Owner(415) 925-3617
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
11 yrs in NPPES 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
- 2015-04-23
- Last updated
- 2025-06-16
- Certified
- 2025-06-16
Frequently asked questions
- What is Kwok Internal Medicine a Medical Corporation's NPI number?
- Kwok Internal Medicine a Medical Corporation's National Provider Identifier (NPI) is 1649667072, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Kwok Internal Medicine a Medical Corporation?
- Kwok Internal Medicine a Medical Corporation is classified in the NPPES registry as Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Kwok Internal Medicine a Medical Corporation located?
- Kwok Internal Medicine a Medical Corporation's practice location on file with NPPES is 895 Sir Francis Drake Blvd, San Anselmo, CA 94960-1916.
- What is Kwok Internal Medicine a Medical Corporation's phone number?
- The practice phone number listed in the NPPES registry for Kwok Internal Medicine a Medical Corporation is (415) 925-3617.
- Does Kwok Internal Medicine a Medical Corporation accept Medicare?
- Kwok Internal Medicine a Medical Corporation is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for Kwok Internal Medicine a Medical Corporation?
- The authorized official listed on Kwok Internal Medicine a Medical Corporation's NPPES record is Michael Kwok, Owner. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Kwok Internal Medicine a Medical Corporation's NPI active?
- Yes — Kwok Internal Medicine a Medical Corporation's NPI (1649667072) is active in the NPPES registry as of the last update on 2025-06-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.