Quick answers
- Which hospitals does Matthew M. O Brien work at?
- Medicare's official clinician data lists Matthew M. O Brien at 2 hospitals: Christiana Hospital and Riddle Memorial Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Matthew M. O Brien see patients?
- Medicare's clinician data lists 1 practice location in Wilmington, DE. Call before your visit to confirm the address.
- What is Matthew M. O Brien's specialty?
- Medicare lists Family Practice as the primary specialty.
- Does Matthew M. O Brien accept Medicare assignment?
- Yes. Medicare's clinician data says Matthew M. O Brien 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 Matthew M. O Brien offer telehealth?
- Medicare's clinician data says Matthew M. O Brien offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Matthew M. O Brien?
- (302) 478-5650, as listed in official Medicare / NPI Registry data.
- What is Matthew M. O Brien's NPI number?
- 1417996935. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Matthew M. O Brien works
Medicare's Facility Affiliation Data lists Matthew M. O Brien at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Christiana HospitalNewark, DE · Acute Care Hospital · CCN 080001
- Riddle Memorial HospitalMedia, PA · Acute Care Hospital · CCN 390222
Practice locations
Addresses where Matthew M. O Brien is enrolled with Medicare (CMS data updated 2026-10-02).
- 1401 Foulk Rd, Suite 202Wilmington, DE 19803 (302) 478‑5650
Specialties
- Family Practiceprimary
Other family doctors in Wilmington
Clinicians with the same Medicare primary specialty in Wilmington, DE — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Jefferson Medical College Of Thomas Jefferson University |
| Graduation year | 1997 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1417996935 |
| 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