Quick answers
- Which hospitals does Mary M. Oconnor work at?
- Medicare's official clinician data lists Mary M. Oconnor at 4 hospitals: Beaumont Hospital Royal Oak, Huron Valley-Sinai Hospital, McLaren Oakland and Trinity Health Oakland Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mary M. Oconnor see patients?
- Medicare's clinician data lists 2 practice locations, including Commerce Township, MI and Clarkston, MI. Call before your visit to confirm the address.
- What is Mary M. Oconnor's specialty?
- Medicare lists Pulmonary Disease as the primary specialty, and also Internal Medicine.
- Does Mary M. Oconnor accept Medicare assignment?
- Yes. Medicare's clinician data says Mary M. Oconnor 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 Mary M. Oconnor?
- (248) 937-3395, as listed in official Medicare / NPI Registry data.
- What is Mary M. Oconnor's NPI number?
- 1851401129. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mary M. Oconnor works
Medicare's Facility Affiliation Data lists Mary M. Oconnor at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Beaumont Hospital Royal OakRoyal Oak, MI · Acute Care Hospital · CCN 230130
- Huron Valley-Sinai HospitalCommerce Township, MI · Acute Care Hospital · CCN 230277
- McLaren OaklandPontiac, MI · Acute Care Hospital · CCN 230207
- Trinity Health Oakland HospitalPontiac, MI · Acute Care Hospital · CCN 230029
Practice locations
Addresses where Mary M. Oconnor is enrolled with Medicare (CMS data updated 2026-10-02).
- 1 Wiliam Carls DrCommerce Township, MI 48382 (248) 937‑3395
- 5701 Bow Pointe DrClarkston, MI 48346 (248) 922‑9283
Group practices
Medicare enrollment lists Mary M. Oconnor as a member of this group (CMS data updated 2026-10-02).
- Pulmonary and Critical Care Medicine Consultants PC3 clinicians in the group
Specialties
- Pulmonary Diseaseprimary
- Internal Medicinealso
Other pulmonologists in Michigan
Clinicians with the same Medicare primary specialty in Michigan — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | Michigan State University College Of Osteopathic Medicine |
| Graduation year | 2002 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1851401129 |
| 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