Quick answers
- Which hospitals does Marissa Costello work at?
- Medicare's official clinician data lists Marissa Costello at 3 hospitals: Beaumont Hospital - Dearborn, Beaumont Hospital Royal Oak and Corewell Health Wayne Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Marissa Costello see patients?
- Medicare's clinician data lists 2 practice locations, including Belleville, MI and Canton, MI. Call before your visit to confirm the address.
- What is Marissa Costello's specialty?
- Medicare lists Family Practice as the primary specialty.
- Does Marissa Costello accept Medicare assignment?
- Yes. Medicare's clinician data says Marissa Costello 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 Marissa Costello?
- (734) 697-9065, as listed in official Medicare / NPI Registry data.
- What is Marissa Costello's NPI number?
- 1467071860. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Marissa Costello works
Medicare's Facility Affiliation Data lists Marissa Costello at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Beaumont Hospital - DearbornDearborn, MI · Acute Care Hospital · CCN 230020
- Beaumont Hospital Royal OakRoyal Oak, MI · Acute Care Hospital · CCN 230130
- Corewell Health Wayne HospitalWayne, MI · Acute Care Hospital · CCN 230142
Practice locations
Addresses where Marissa Costello is enrolled with Medicare (CMS data updated 2026-10-02).
- 201 3rd St, Suite 200Belleville, MI 48111 (734) 697‑9065
- 2050 N Haggerty RdCanton, MI 48187
Group practices
Medicare enrollment lists Marissa Costello as a member of this group (CMS data updated 2026-10-02).
- Oakwood Ambulatory LLC274 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Belleville
Clinicians with the same Medicare primary specialty in Belleville, MI — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Michigan State University College Of Human Medicine |
| Graduation year | 2020 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1467071860 |
| 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