Gregory T. Yesensky, D.O.
Family Medicine Physician · Fairfield, CA
Gregory T. Yesensky, D.O. is a family medicine physician with a practice address in Fairfield, California, and NPI 1437261302, issued on Aug 31, 2006. Check the license (California 20A8758, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Gregory T. Yesensky
- Credential
- D.O.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 20A8758 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2201 Courage Dr, Fairfield, CA 94533
- Phone
- (707) 784-2010
- Enumerated
- Aug 31, 2006
- Record last updated
- May 21, 2015 (not updated in 11 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 2201 Courage Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sumera Ahmed, MDInternal Medicine Physician1134180219
- Lianna AlbertCounselor1396230678
- Ofelia Alota, M.D.Pediatrics Physician1528022456
- Maryanne Cleary, LCSWClinical Social Worker1700946704
- Elizabeth Coudright, LCSWClinical Social Worker1467849554
- Kelly Doyle-Matta, PA-CMedical Physician Assistant1598952335
Verify Gregory T. Yesensky in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A8758Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average family medicine physician in 2024
86 Medicare Part D claims for 21 beneficiaries, against an average of 3,544 among the 117,163 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.
Gregory T. Yesensky among 17,133 family medicine physician records in California
Gregory T. Yesensky, D.O. is one of 17,133 family medicine physician records with a practice address in California. 81% 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 6% of them.
- NPI issued2006 · 6% of these records are older, 59% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 62% of these records are
- Record last updated2015 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
67 family medicine physician records list a practice address in Fairfield
They are 67 of the 3,595 NPPES records with a practice address in Fairfield, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Fairfield → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Rebekah Ayodele, M.D.Fairfield, CA 945331114965258
- Ronald Chapman, MDFairfield, CA 945331629006333
- David Danzeisen, MDFairfield, CA 945331306924295
- Padma Dasari, M DFairfield, CA 945331730261488
- James Firman, M.D.Fairfield, CA 945331134164189
- Craig Gillespie, MDFairfield, CA 945331609885037
- David Gilliam, M.D.Fairfield, CA 945331376526236
- Robert Landgraf, D.O.Fairfield, CA 945331821032970
Common questions
What is Gregory T. Yesensky, D.O.'s NPI number?
Gregory T. Yesensky, D.O.'s National Provider Identifier (NPI) is 1437261302, issued on Aug 31, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gregory T. Yesensky, D.O. located?
The NPPES record lists a practice address at 2201 Courage Dr, Fairfield, CA, 94533. Phone: (707) 784-2010. Providers update this record themselves, so call before visiting.
How can I verify Gregory T. Yesensky, D.O.'s license?
NPPES lists California license number 20A8758, 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 Gregory T. Yesensky, D.O. prescribe under Medicare Part D?
In 2024, Gregory T. Yesensky, D.O. had 86 Medicare Part D claims for 21 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.