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Family Practice

Maciej G. Ossowski, MD

Sees patients in Merced, CA · California

Summary

Maciej G. Ossowski, MD (Family Practice) is enrolled with Medicare at 1 practice location in Merced, CA. NPI 1346207883. Source: CMS National Downloadable File, updated 2026-10-02.

Call(209) 580‑4638 NPI Registry record Medicare profile

From official Medicare data

This page shows what Medicare's official clinician data says about Maciej G. Ossowski, joined by NPI number (data updated 2026-10-02). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

At a glance

1Practice location
Family PracticePrimary specialty
May acceptAccepts Medicare assignment
YesOffers telehealth
53Years since medical school (graduated 1973)
MaleGender (as listed)
Provident Primary Care IncGroup practice

Quick answers

Where does Maciej G. Ossowski see patients?
Medicare's clinician data lists 1 practice location in Merced, CA. Call before your visit to confirm the address.
What is Maciej G. Ossowski's specialty?
Medicare lists Family Practice as the primary specialty.
Does Maciej G. Ossowski accept Medicare assignment?
Medicare's clinician data says Maciej G. Ossowski may accept Medicare assignment (as of 2026-10-02). Ask the office whether they accept it for your visit.
Does Maciej G. Ossowski offer telehealth?
Medicare's clinician data says Maciej G. Ossowski offers telehealth services. Ask the office which visits can be done by video or phone.
What is the phone number for Maciej G. Ossowski?
(209) 580-4638, as listed in official Medicare / NPI Registry data.
What is Maciej G. Ossowski's NPI number?
1346207883. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Practice locations

Addresses where Maciej G. Ossowski is enrolled with Medicare (CMS data updated 2026-10-02).

Group practices

Medicare enrollment lists Maciej G. Ossowski as a member of this group (CMS data updated 2026-10-02).

  • Provident Primary Care Inc10 clinicians in the group

Specialties

Find other Family Practice doctors in California →

Other family doctors in Merced

Clinicians with the same Medicare primary specialty in Merced, CA — not a recommendation.

All family doctors in Merced →

Clinician information

CredentialMD
Graduation year1973
Gender (as listed)Male
Medicare assignmentMay accept for some services
TelehealthOffers telehealth services
NPI (National Provider Identifier)1346207883
CorrectionsReport 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

  1. National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
  2. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  3. Medicare Care Compare — official Medicare tool to look up clinicians