John Chau, M.D.
NPI 1740375070 · Internal Medicine Physician · San Diego, CA
Enrolled with Medicare as Order and Referring Only - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Chau, M.D. is a Internal Medicine Physician provider in San Diego, CA (NPI 1740375070).
Provider details
- NPI number
- 1740375070
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- A52498 (CA)
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
19 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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 38 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 174 | 53 |
| Amlodipine Besylate | 145 | 47 |
| Losartan Potassium | 81 | 28 |
| Semaglutidebrand: Ozempic | 62 | — |
| Lisinopril | 61 | 18 |
| Hydrochlorothiazide | 60 | 19 |
| Metformin Hcl |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-10-03
- Last updated
- 2007-07-08
Frequently asked questions
- What is John Chau's NPI number?
- John Chau's National Provider Identifier (NPI) is 1740375070, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Chau's specialty?
- John Chau is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John Chau located?
- John Chau's practice location on file with NPPES is 120 Elm St Ste 100, San Diego, CA 92101-2602.
- What is John Chau's phone number?
- The practice phone number listed in the NPPES registry for John Chau is (619) 235-4211.
- Does John Chau accept Medicare?
- John Chau is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Chau's NPI active?
- Yes — John Chau's NPI (1740375070) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.