Jennifer L. Leoniak, D.O., M.S.
Infectious Disease Physician · Turlock, CA
Jennifer L. Leoniak, D.O., M.S. is an infectious disease physician with a practice address in Turlock, California, and NPI 1588808703, issued on May 1, 2009. Check the license (California 13410, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Jennifer L. Leoniak
- Credential
- D.O., M.S.
- Primary taxonomy
- Infectious Disease Physician 207RI0200X
- License number
- 13410 CA
Self-reported in NPPES; status is on the state search - Practice location
- 920 Delbon Ave, Turlock, CA 95382
- Phone
- (209) 208-0923
- Enumerated
- May 1, 2009
- Record last updated
- Mar 27, 2025
- Fax
- (097) 484-8502
- Medicare enrollment
- Enrolled (PECOS I20140924002607); may accept Medicare assignment
- Medical or professional school
- New York College Of Osteo Medicine Of New York Institute Of Technology, 2009
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest infectious disease physician records → All 1,119 in California → Look up another NPI →
Also registered at 920 Delbon Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Ronald Arakelian, M.D.Internal Medicine Physician1770514515
- Mark Davenport, M.D.Internal Medicine Physician1831129493
- Edward Holm, M.D.Internal Medicine Physician1891729265
Verify Jennifer L. Leoniak in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 13410Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
22% more Medicare Part D claims than the average infectious disease physician in 2024
843 Medicare Part D claims for 146 beneficiaries, against an average of 689 among the 7,388 providers of this specialty who prescribed in Part D. Brand-name drugs were 35% of claims.
Most prescribed
- Biktarvy150 claims
- Fluconazole84 claims
- Cephalexin62 claims
- Amoxicillin-Clavulanate Potass46 claims
- Doxycycline Hyclate45 claims
- Azithromycin33 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 MIPS final score for 2023 (Medicare payment program): 59.3 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $524.82
33 payments; by number, the most common kind was food and beverage; the largest payer was Gilead Sciences, Inc. The 3,895 providers of this specialty with any payment received $4,362.19 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
- Golden Valley Health CentersModesto, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jennifer L. Leoniak among 1,119 infectious disease physician records in California
Jennifer L. Leoniak, D.O., M.S. is one of 1,119 infectious disease 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 2009, is newer than 66% of them.
- NPI issued2009 · 66% of these records are older, 31% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2009 · median 2003 among the 735 with a school on file
- Record last updated2025 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RI0200X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Infectious Disease Physician providers in California
There are 1,119 infectious disease physician records in California.
All 1,119 in California → Every provider in Turlock → Infectious Disease Physician nationwide →
The 8 infectious disease physician records with the nearest ZIP codes
- Alexander Evens, D.O.Turlock, CA 953821114144649
- Praveena Sarma, MDTracy, CA 953761194793182
- Andrew Desruisseau, M.D.Santa Rosa, CA 954031518945658
- Gary Green, MDSanta Rosa, CA 954031124102108
- Frederick Drach, M.D.Santa Rosa, CA 954051326083213
- Tiffany Ngai, M.D.Santa Rosa, CA 954051215378930
- Ye ThuSanta Rosa, CA 954051306180146
- Zarchi Sumon, M.D.Modesto, CA 953561093154486
Common questions
What is Jennifer L. Leoniak, D.O., M.S.'s NPI number?
Jennifer L. Leoniak, D.O., M.S.'s National Provider Identifier (NPI) is 1588808703, issued on May 1, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Jennifer L. Leoniak, D.O., M.S. located?
The NPPES record lists a practice address at 920 Delbon Ave, Turlock, CA, 95382. Phone: (209) 208-0923. Providers update this record themselves, so call before visiting.
How can I verify Jennifer L. Leoniak, D.O., M.S.'s license?
NPPES lists California license number 13410, 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 Jennifer L. Leoniak, D.O., M.S. prescribe under Medicare Part D?
In 2024, Jennifer L. Leoniak, D.O., M.S. had 843 Medicare Part D claims for 146 beneficiaries; the average among infectious disease physician prescribers was 689. Part D covers Medicare prescriptions only.
What is Jennifer L. Leoniak, D.O., M.S.'s MIPS final score?
The 2023 MIPS final score is 59.3 of 100. 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.