Lester R. Ryan, M.D.
Psychiatry Physician · Fairfield, CA
Lester R. Ryan, M.D. is a psychiatry physician with a practice address in Fairfield, California, and NPI 1487716718, issued on Dec 14, 2006. Check the license (California A45767, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Lester R. Ryan
- Credential
- M.D.
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- A45767 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3291 Inwood PL, Fairfield, CA 94534
- Phone
- (707) 421-1198
- Enumerated
- Dec 14, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 8,673 in California → Look up another NPI →
Verify Lester R. Ryan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A45767Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average psychiatry physician in 2024
11 Medicare Part D claims, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Lester R. Ryan among 8,673 psychiatry physician records in California
Lester R. Ryan, M.D. is one of 8,673 psychiatry physician records with a practice address in California. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 2% of them.
- NPI issued2006 · 2% of these records are older, 67% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileNo · 38% of these records are
- Record last updated2007 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Psychiatry Physician providers in California
There are 8,673 psychiatry physician records in California.
All 8,673 in California → Every provider in Fairfield → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Brian Halevie-Goldman, M.D.Fairfield, CA 945341669694857
- Artoteles Tandinco, MDFairfield, CA 945341629147533
- Naiyar Zaman, MD MHAFairfield, CA 945341558383380
- Nataliya Ables, D.O.Travis Afb, CA 945351205102431
- Nicole Baker, M.D.Travis Afb, CA 945351689011462
- Steven Ciric, M.D.Fairfield, CA 945331679612626
- Jocelyn Cruz, MDFairfield, CA 945331033270400
- Homayoun Faghihi-Shirazi, M.D.Fairfield, CA 945331235244294
Common questions
What is Lester R. Ryan, M.D.'s NPI number?
Lester R. Ryan, M.D.'s National Provider Identifier (NPI) is 1487716718, issued on Dec 14, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Lester R. Ryan, M.D. located?
The NPPES record lists a practice address at 3291 Inwood PL, Fairfield, CA, 94534. Phone: (707) 421-1198. Providers update this record themselves, so call before visiting.
How can I verify Lester R. Ryan, M.D.'s license?
NPPES lists California license number A45767, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Lester R. Ryan, M.D. prescribe under Medicare Part D?
In 2024, Lester R. Ryan, M.D. had 11 Medicare Part D claims; the average among psychiatry physician prescribers was 1,000. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.