Sean Patrick Hennessey, MD
Family Medicine Physician · Vallejo, CA
Sean Patrick Hennessey, MD is a family medicine physician with a practice address in Vallejo, California, and NPI 1750342242, issued on Apr 1, 2006. Check the license (California A02736, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Sean Patrick Hennessey
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- A02736 CA
Self-reported in NPPES; status is on the state search - Practice location
- 100 Hospital Dr, Vallejo, CA 94589
- Phone
- (707) 643-6483
- Enumerated
- Apr 1, 2006
- Record last updated
- Mar 7, 2023
- Fax
- (707) 643-3028
- Medicare enrollment
- Enrolled (PECOS I20080524000083); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 100 Hospital Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Lois Baeta, N.P.Nurse Practitioner1760620983
- Joann Dandurand, FNPFamily Medicine Physician1659332146
- Stella Huang, D.O.Obstetrics & Gynecology Physician1760610273
- Chainarong Limvarapuss, MDHematology & Oncology Physician1053341784
- Alisha McGriff, NPFamily Nurse Practitioner1043050495
- Monica Muzzin, PA-CMedical Physician Assistant1639546914
Verify Sean Patrick Hennessey in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A02736Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
15% more Medicare Part D claims than the average family medicine physician in 2024
4,081 Medicare Part D claims for 365 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 32 claims were for opioids.
Most prescribed
- Atorvastatin Calcium450 claims
- Losartan Potassium243 claims
- Amlodipine Besylate221 claims
- Levothyroxine Sodium134 claims
- Metformin Hcl Er107 claims
- Lisinopril98 claims
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.
Bills Medicare through one group practice
- Sutter Valley Medical FoundationVallejo, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Sean Patrick Hennessey among 17,133 family medicine physician records in California
Sean Patrick Hennessey, MD 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 fileYes · 62% of these records are
- Graduated1985 · median 2005 among the 10,652 with a school on file
- Record last updated2023 · 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).
66 family medicine physician records list a practice address in Vallejo
They are 66 of the 2,836 NPPES records with a practice address in Vallejo, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Vallejo → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Nigel Brandstater, M.D.Vallejo, CA 945891649331372
- Desmond Carson, M.D.Vallejo, CA 945891912934464
- Gabriel Chua, M.D.Vallejo, CA 945891265476428
- Gregory Coe, M.D.Vallejo, CA 945891295797405
- Monica Currie-Johnson, MDVallejo, CA 945891700964608
- Joann Dandurand, FNPVallejo, CA 945891659332146
- Maisha Draves, MDVallejo, CA 945891578641460
- Donn Erickson, MDVallejo, CA 945891003994831
Common questions
What is Sean Patrick Hennessey, MD's NPI number?
Sean Patrick Hennessey, MD's National Provider Identifier (NPI) is 1750342242, issued on Apr 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Sean Patrick Hennessey, MD located?
The NPPES record lists a practice address at 100 Hospital Dr, Vallejo, CA, 94589. Phone: (707) 643-6483. Providers update this record themselves, so call before visiting.
How can I verify Sean Patrick Hennessey, MD's license?
NPPES lists California license number A02736, 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 Sean Patrick Hennessey, MD prescribe under Medicare Part D?
In 2024, Sean Patrick Hennessey, MD had 4,081 Medicare Part D claims for 365 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.