Martin A. Josephson, M.D.
NPI 1861504250 · Cardiovascular Disease Physician · Thousand Oaks, CA
Martin A. Josephson, M.D. is a Cardiovascular Disease Physician organization in Thousand Oaks, CA (NPI 1861504250).
Provider details
- NPI number
- 1861504250
- Entity type
- Organization
- Primary specialty
- Cardiovascular Disease PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Debra Williams, Business Manager(805) 494-9494
- License
- G25198 (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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-31
- Last updated
- 2007-08-22
Frequently asked questions
- What is Martin A. Josephson, M.D.'s NPI number?
- Martin A. Josephson, M.D.'s National Provider Identifier (NPI) is 1861504250, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Martin A. Josephson, M.D.?
- Martin A. Josephson, M.D. is classified in the NPPES registry as Cardiovascular Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Martin A. Josephson, M.D. located?
- Martin A. Josephson, M.D.'s practice location on file with NPPES is 2220 Lynn Rd, Thousand Oaks, CA 91360-1904.
- What is Martin A. Josephson, M.D.'s phone number?
- The practice phone number listed in the NPPES registry for Martin A. Josephson, M.D. is (805) 494-9494.
- Who is the authorized official for Martin A. Josephson, M.D.?
- The authorized official listed on Martin A. Josephson, M.D.'s NPPES record is Debra Williams, Business Manager. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Martin A. Josephson, M.D.'s NPI active?
- Yes — Martin A. Josephson, M.D.'s NPI (1861504250) 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.