Louis Gagnon, MD
NPI 1043951312 · Diagnostic Radiology Physician · San Diego, CA
Louis Gagnon, MD is a Diagnostic Radiology Physician provider in San Diego, CA (NPI 1043951312).
Provider details
- NPI number
- 1043951312
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A175554 (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
4 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
- 2022-04-02
- Last updated
- 2022-04-02
- Certified
- 2022-04-02
Frequently asked questions
- What is Louis Gagnon's NPI number?
- Louis Gagnon's National Provider Identifier (NPI) is 1043951312, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Louis Gagnon's specialty?
- Louis Gagnon is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Louis Gagnon located?
- Louis Gagnon's practice location on file with NPPES is 200 W Arbor Dr, San Diego, CA 92103-9000.
- What is Louis Gagnon's phone number?
- The practice phone number listed in the NPPES registry for Louis Gagnon is (858) 657-7000.
- Is Louis Gagnon's NPI active?
- Yes — Louis Gagnon's NPI (1043951312) is active in the NPPES registry as of the last update on 2022-04-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.