Margaret Ryan, MD, MPH
NPI 1619977618 · Preventive Medicine/Occupational Environmental Medicine Physician · San Diego, CA
Margaret Ryan, MD, MPH is a Preventive Medicine/Occupational Environmental Medicine Physician provider in San Diego, CA (NPI 1619977618).
Provider details
- NPI number
- 1619977618
- Entity type
- Individual
- Primary specialty
- Preventive Medicine/Occupational Environmental Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD, MPH
- Sex
- Female
- License
- D42576 (MD)
Specialties & taxonomies
- Preventive Medicine/Occupational Environmental Medicine PhysicianPrimary2083P0500XLicense D42576 (MD)
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
- 2005-08-01
- Last updated
- 2007-07-08
Frequently asked questions
- What is Margaret Ryan's NPI number?
- Margaret Ryan's National Provider Identifier (NPI) is 1619977618, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Margaret Ryan's specialty?
- Margaret Ryan is listed in the NPPES registry with a primary specialty of Preventive Medicine/Occupational Environmental Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Margaret Ryan located?
- Margaret Ryan's practice location on file with NPPES is Nhrc Code 25, San Diego, CA 92186-5122.
- What is Margaret Ryan's phone number?
- The practice phone number listed in the NPPES registry for Margaret Ryan is (619) 553-8097.
- Is Margaret Ryan's NPI active?
- Yes — Margaret Ryan's NPI (1619977618) 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.