Charles Johnson, M.D.
NPI 1306039383 · Cardiovascular Disease Physician · Thousand Oaks, CA
Charles Johnson, M.D. is a Cardiovascular Disease Physician provider in Thousand Oaks, CA (NPI 1306039383).
Provider details
- NPI number
- 1306039383
- Entity type
- Individual
- Primary specialty
- Cardiovascular Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- C35083 (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
18 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
- 2007-08-22
- Last updated
- 2007-08-22
Frequently asked questions
- What is Charles Johnson's NPI number?
- Charles Johnson's National Provider Identifier (NPI) is 1306039383, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Charles Johnson's specialty?
- Charles Johnson is listed in the NPPES registry with a primary specialty of Cardiovascular Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Charles Johnson located?
- Charles Johnson's practice location on file with NPPES is 2220 Lynn Rd, Thousand Oaks, CA 91360-1904.
- What is Charles Johnson's phone number?
- The practice phone number listed in the NPPES registry for Charles Johnson is (805) 494-9494.
- Is Charles Johnson's NPI active?
- Yes — Charles Johnson's NPI (1306039383) is active in the NPPES registry as of the last update on 2007-08-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.