Ali Hassani, MD
Internal Medicine Physician · Vacaville, CA
Ali Hassani, MD is an internal medicine physician with a practice address in Vacaville, California, and NPI 1487818373, issued on Jul 10, 2008. Check the license on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Ali Hassani
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 4301093082 MI
Self-reported in NPPES; status is on the state search - Practice location
- 421 Nut Tree RD, Vacaville, CA 95687
- Phone
- (707) 624-7500
- Enumerated
- Jul 10, 2008
- Record last updated
- Dec 11, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (707) 624-7501
- Medicare enrollment
- Enrolled (PECOS I20110922000113); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 421 Nut Tree RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Treesa Antony, DNP, FNP-BC, RN-BSNFamily Nurse Practitioner1003379306
- Kulbir Bajwa, M.D.Internal Medicine Physician1912000126
- Mark Brown, FNP-CFamily Nurse Practitioner1346053048
- Mary Cargill, NPNurse Practitioner1922642784
- Ana Cherry, M.D.Family Medicine Physician1679656573
- Garth Davis, MDInternal Medicine Physician1770535692
Verify Ali Hassani in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of CaliforniaCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
44% more Medicare Part D claims than the average internal medicine physician in 2024
4,583 Medicare Part D claims for 386 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 45 claims were for opioids.
Most prescribed
- Atorvastatin Calcium374 claims
- Levothyroxine Sodium215 claims
- Pantoprazole Sodium181 claims
- Metformin Hcl173 claims
- Amlodipine Besylate159 claims
- Losartan Potassium156 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 2 group practices
- Northbay Health Medical FoundationVacaville, CA
- Northbay Physicians Surgery Center, LLCVacaville, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ali Hassani among 17,696 internal medicine physician records in California
Ali Hassani, MD is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 56% of them.
- NPI issued2008 · 56% of these records are older, 40% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2007 · median 2004 among the 11,065 with a school on file
- Record last updated2015 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
53 internal medicine physician records list a practice address in Vacaville
They are 53 of the 1,903 NPPES records with a practice address in Vacaville, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Vacaville → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Nicolas Aguilera, M.D.Vacaville, CA 956871780876508
- Kulbir Bajwa, M.D.Vacaville, CA 956871912000126
- Yuen Chen, MDVacaville, CA 956871407925605
- Garth Davis, MDVacaville, CA 956871770535692
- Thomas Erskine, M.D.Vacaville, CA 956871194732339
- Bethlehem Haile, M.DVacaville, CA 956871063605103
- Aurora Haworth, M.D.Vacaville, CA 956871164684932
- Gurjit Kaur, MDVacaville, CA 956871922635580
Common questions
What is Ali Hassani, MD's NPI number?
Ali Hassani, MD's National Provider Identifier (NPI) is 1487818373, issued on Jul 10, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Ali Hassani, MD located?
The NPPES record lists a practice address at 421 Nut Tree RD, Vacaville, CA, 95687. Phone: (707) 624-7500. Providers update this record themselves, so call before visiting.
How can I verify Ali Hassani, MD's license?
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 Ali Hassani, MD prescribe under Medicare Part D?
In 2024, Ali Hassani, MD had 4,583 Medicare Part D claims for 386 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.