John Simpson, M.D.
NPI 1356395263 · Cardiovascular Disease Physician · Redwood City, CA
John Simpson, M.D. is a Cardiovascular Disease Physician provider in Redwood City, CA (NPI 1356395263).
Provider details
- NPI number
- 1356395263
- Entity type
- Individual
- Primary specialty
- Cardiovascular Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- License
- G33266 (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
20 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
- 2006-05-22
- Last updated
- 2007-07-08
Frequently asked questions
- What is John Simpson's NPI number?
- John Simpson's National Provider Identifier (NPI) is 1356395263, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Simpson's specialty?
- John Simpson is listed in the NPPES registry with a primary specialty of Cardiovascular Disease Physician (Allopathic & Osteopathic Physicians).
- Where is John Simpson located?
- John Simpson's practice location on file with NPPES is 2900 Whipple Ave, Redwood City, CA 94062-2843.
- What is John Simpson's phone number?
- The practice phone number listed in the NPPES registry for John Simpson is (650) 306-2300.
- Is John Simpson's NPI active?
- Yes — John Simpson's NPI (1356395263) 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.