Quick answers
- Which hospitals does Dmitry A. Leongardt work at?
- Medicare's official clinician data lists Dmitry A. Leongardt at 5 hospitals: Adventist Health Clearlake, Adventist Health St Helena, Petaluma Valley Hospital, Providence Queen of the Valley Medical Center and Sonoma Valley Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Dmitry A. Leongardt see patients?
- Medicare's clinician data lists 1 practice location in Napa, CA. Call before your visit to confirm the address.
- What is Dmitry A. Leongardt's specialty?
- Medicare lists Internal Medicine as the primary specialty, and also Critical Care (Intensivists) and Hospitalist.
- Does Dmitry A. Leongardt accept Medicare assignment?
- Yes. Medicare's clinician data says Dmitry A. Leongardt accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Dmitry A. Leongardt?
- (707) 252-4411, as listed in official Medicare / NPI Registry data.
- What is Dmitry A. Leongardt's NPI number?
- 1174549554. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Dmitry A. Leongardt works
Medicare's Facility Affiliation Data lists Dmitry A. Leongardt at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Adventist Health ClearlakeClearlake, CA · Critical Access Hospital · CCN 051317
- Adventist Health St HelenaSaint Helena, CA · Acute Care Hospital · CCN 050013
- Petaluma Valley HospitalPetaluma, CA · Acute Care Hospital · CCN 050136
- Providence Queen of the Valley Medical CenterNapa, CA · Acute Care Hospital · CCN 050009
- Sonoma Valley HospitalSonoma, CA · Acute Care Hospital · CCN 050090
Practice locations
Addresses where Dmitry A. Leongardt is enrolled with Medicare (CMS data updated 2026-10-02).
- 1000 Trancas StNapa, CA 94558 (707) 252‑4411
Group practices
Medicare enrollment lists Dmitry A. Leongardt as a member of this group (CMS data updated 2026-10-02).
- Providence Medical Foundation1,466 clinicians in the group
Specialties
- Internal Medicineprimary
- Critical Care (Intensivists)also
- Hospitalistalso
Other internal medicine doctors in Napa
Clinicians with the same Medicare primary specialty in Napa, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1994 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1174549554 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians