Jennifer Leoniak, D.O., M.S.
NPI 1588808703 · Infectious Disease Physician · Turlock, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jennifer Leoniak, D.O., M.S. is a Infectious Disease Physician provider in Turlock, CA (NPI 1588808703).
Provider details
- NPI number
- 1588808703
- Entity type
- Individual
- Primary specialty
- Infectious Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O., M.S.
- Sex
- Female
- Sole proprietor
- Yes
- License
- 13410 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
17 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
2,546 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 1,729 | $103 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 513 | $150 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 174 | $78 |
| Critical Care, First 30-74 Minutes99291 | 103 | $182 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 14 | $112 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 20 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Bictegrav/Emtricit/Tenofov Alabrand: Biktarvy | 150 | 15 |
| Fluconazole | 84 | 19 |
| Cephalexin | 62 | 15 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 46 | — |
| Doxycycline Hyclate | 45 | — |
| Azithromycin | 33 | — |
| Dolutegravir Sodiumbrand: Tivicay | 31 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$525 across 33 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2009-05-01
- Last updated
- 2025-03-27
- Certified
- 2025-03-27
Frequently asked questions
- What is Jennifer Leoniak's NPI number?
- Jennifer Leoniak's National Provider Identifier (NPI) is 1588808703, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jennifer Leoniak's specialty?
- Jennifer Leoniak is listed in the NPPES registry with a primary specialty of Infectious Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Jennifer Leoniak located?
- Jennifer Leoniak's practice location on file with NPPES is 920 Delbon Ave, Turlock, CA 95382-2019.
- What is Jennifer Leoniak's phone number?
- The practice phone number listed in the NPPES registry for Jennifer Leoniak is (209) 208-0923.
- Does Jennifer Leoniak accept Medicare?
- Jennifer Leoniak is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jennifer Leoniak's NPI active?
- Yes — Jennifer Leoniak's NPI (1588808703) is active in the NPPES registry as of the last update on 2025-03-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.