Jeffrey R. Breneisen, MD
Cardiovascular Disease Physician · Fairfield, CA
Jeffrey R. Breneisen, MD is a cardiovascular disease physician with a practice address in Fairfield, California, and NPI 1629058615, issued on Jan 18, 2006. Check the license (California G86677, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Jeffrey R. Breneisen
- Credential
- MD
- Primary taxonomy
- Cardiovascular Disease Physician 207RC0000X
- License number
- G86677 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1860 Pennsylvania Ave, Fairfield, CA 94533
- Phone
- (707) 646-4400
- Enumerated
- Jan 18, 2006
- Record last updated
- Jul 31, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (707) 646-4401
- Medicaid ID
- 00G866770 CA
- Medicare enrollment
- Enrolled (PECOS I20041025000637); accepts Medicare assignment
- Medical or professional school
- University Of Illinois College Of Med (Chi/Peor/Rock/Chm-Urb), 1993
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest cardiovascular disease physician records → All 2,574 in California → Look up another NPI →
Also registered at 1860 Pennsylvania Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Courtney Chambers, M.D.Surgery Physician1528154523
- Milind Dhond, M. D.Cardiovascular Disease Physician1972500676
- Donald Doyle, MDPulmonary Disease Physician1699766220
- William Fulton, D.O.Surgery Physician1497831564
Verify Jeffrey R. Breneisen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G86677Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
17% more Medicare Part D claims than the average cardiovascular disease physician in 2024
3,604 Medicare Part D claims for 497 beneficiaries, against an average of 3,078 among the 20,728 providers of this specialty who prescribed in Part D. Brand-name drugs were 20% of claims.
Most prescribed
- Metoprolol Succinate317 claims
- Atorvastatin Calcium281 claims
- Carvedilol278 claims
- Amlodipine Besylate231 claims
- Eliquis208 claims
- Lisinopril176 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.
Industry payments in 2024: $3,426.09
149 payments; by number, the most common kind was food and beverage; the largest payer was Inari Medical, Inc. The 16,686 providers of this specialty with any payment received $3,819.56 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Northbay Health Medical FoundationFairfield, CA
- Northbay Physicians Surgery Center, LLCFairfield, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jeffrey R. Breneisen among 2,574 cardiovascular disease physician records in California
Jeffrey R. Breneisen, MD is one of 2,574 cardiovascular disease physician records with a practice address in California. 83% 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 10% of them.
- NPI issued2006 · 10% of these records are older, 45% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated1993 · median 1999 among the 1,742 with a school on file
- Record last updated2015 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RC0000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Cardiovascular Disease Physician providers in California
There are 2,574 cardiovascular disease physician records in California.
All 2,574 in California → Every provider in Fairfield → Cardiovascular Disease Physician nationwide →
The 8 cardiovascular disease physician records with the nearest ZIP codes
- Gurinder Dhillon, MDFairfield, CA 945331669490454
- Milind Dhond, M. D.Fairfield, CA 945331972500676
- Cyrus Mancherje, M.D.Fairfield, CA 945331659398543
- Ho-Hin Choy, M.D.Fairfield, CA 945341083008262
- Alan ValentinFairfield, CA 945341689508822
- Nathan Anderson, M.D.Travis Afb, CA 945351861698656
- Mehdi Azadi, MDTravis Afb, CA 945351679788723
- Sam Chitsaz, M.D.Antioch, CA 945311821364084
Common questions
What is Jeffrey R. Breneisen, MD's NPI number?
Jeffrey R. Breneisen, MD's National Provider Identifier (NPI) is 1629058615, issued on Jan 18, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Jeffrey R. Breneisen, MD located?
The NPPES record lists a practice address at 1860 Pennsylvania Ave, Fairfield, CA, 94533. Phone: (707) 646-4400. Providers update this record themselves, so call before visiting.
How can I verify Jeffrey R. Breneisen, MD's license?
NPPES lists California license number G86677, 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 Jeffrey R. Breneisen, MD prescribe under Medicare Part D?
In 2024, Jeffrey R. Breneisen, MD had 3,604 Medicare Part D claims for 497 beneficiaries; the average among cardiovascular disease physician prescribers was 3,078. 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.