James Francis Leoni, M.D.
Family Medicine Physician · Petaluma, CA
James Francis Leoni, M.D. is a family medicine physician with a practice address in Petaluma, California, and NPI 1205936861, issued on Sep 24, 2006. Check the license (California G56154, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- James Francis Leoni
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- G56154 CA
Self-reported in NPPES; status is on the state search - Practice location
- 104 Lynch Creek Way, Petaluma, CA 94954
- Phone
- (707) 782-9123
- Enumerated
- Sep 24, 2006
- Record last updated
- Feb 8, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (707) 782-9622
- Medicaid ID
- 1205936861 CA
- Medicare enrollment
- Enrolled (PECOS I20050921000882); accepts Medicare assignment
- Medical or professional school
- Creighton University School Of Medicine, 1983
- 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 104 Lynch Creek Way
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify James Francis Leoni in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G56154Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.4 times the Medicare Part D claims of the average family medicine physician in 2024
8,440 Medicare Part D claims for 633 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. 142 claims were for opioids.
Most prescribed
- Atorvastatin Calcium625 claims
- Amlodipine Besylate372 claims
- Levothyroxine Sodium364 claims
- Lisinopril348 claims
- Losartan Potassium285 claims
- Tamsulosin Hcl213 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 55.6 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $34.02
2 payments; by number, the most common kind was food and beverage; the largest payer was Pfizer Inc. The 55,478 providers of this specialty with any payment received $902.55 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 one group practice
- Attenda Medical Group IncPetaluma, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
James Francis Leoni among 17,133 family medicine physician records in California
James Francis Leoni, M.D. 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
- Graduated1983 · median 2005 among the 10,652 with a school on file
- Record last updated2012 · 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).
46 family medicine physician records list a practice address in Petaluma
They are 46 of the 1,856 NPPES records with a practice address in Petaluma, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Petaluma → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Andrew Ashcroft, M.D.Petaluma, CA 949541053306795
- Richard Chen, MDPetaluma, CA 949541285602573
- Jonathan Choe, M.D.Petaluma, CA 949541518959170
- Michelle Davey, DOPetaluma, CA 949541366445785
- Patrick Flynn, M.D.Petaluma, CA 949541770567745
- Colleen Foy Sterling, M.D.Petaluma, CA 949541619969326
- Robert Hentz, MDPetaluma, CA 949541720012107
- Audra Lehman, M.D.Petaluma, CA 949541063404762
Common questions
What is James Francis Leoni, M.D.'s NPI number?
James Francis Leoni, M.D.'s National Provider Identifier (NPI) is 1205936861, issued on Sep 24, 2006. An NPI identifies a provider in billing; it is not a license.
Where is James Francis Leoni, M.D. located?
The NPPES record lists a practice address at 104 Lynch Creek Way, Petaluma, CA, 94954. Phone: (707) 782-9123. Providers update this record themselves, so call before visiting.
How can I verify James Francis Leoni, M.D.'s license?
NPPES lists California license number G56154, 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 James Francis Leoni, M.D. prescribe under Medicare Part D?
In 2024, James Francis Leoni, M.D. had 8,440 Medicare Part D claims for 633 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
What is James Francis Leoni, M.D.'s MIPS final score?
The 2023 MIPS final score is 55.6 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.