Quick answers
- Which hospitals does Mari J. Collins work at?
- Medicare's official clinician data lists Mari J. Collins at 2 hospitals: Memorial Hospital and St Marys Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mari J. Collins see patients?
- Medicare's clinician data lists 3 practice locations, including O Fallon, IL, Decatur, IL and Belleville, IL. Call before your visit to confirm the address.
- What is Mari J. Collins's specialty?
- Medicare lists Nurse Practitioner as the primary specialty.
- Does Mari J. Collins accept Medicare assignment?
- Yes. Medicare's clinician data says Mari J. Collins 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.
- Does Mari J. Collins offer telehealth?
- Medicare's clinician data says Mari J. Collins offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Mari J. Collins?
- (618) 234-2120, as listed in official Medicare / NPI Registry data.
- What is Mari J. Collins's NPI number?
- 1659974764. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mari J. Collins works
Medicare's Facility Affiliation Data lists Mari J. Collins at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Memorial HospitalBelleville, IL · Acute Care Hospital · CCN 140185
- St Marys HospitalDecatur, IL · Acute Care Hospital · CCN 140166
Practice locations
Addresses where Mari J. Collins is enrolled with Medicare (CMS data updated 2026-10-02).
- 1 Saint Elizabeth BlvdO Fallon, IL 62269 (618) 234‑2120
- 1800 E Lake Shore DrDecatur, IL 62521 (217) 464‑2966
- 4500 Memorial DrBelleville, IL 62226 (618) 257‑6220
Group practices
Medicare enrollment lists Mari J. Collins as a member of these groups (CMS data updated 2026-10-02).
- Fairview Heights Medical Group SC444 clinicians in the group
- Cep America-Illinois Hospitalists, LLP196 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in O Fallon
Clinicians with the same Medicare primary specialty in O Fallon, IL — not a recommendation.
Clinician information
| Graduation year | 2020 |
|---|---|
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1659974764 |
| 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