Quick answers
- Which hospitals does Daniel A. Rey work at?
- Medicare's official clinician data lists Daniel A. Rey at 1 hospital: Mercy Hospital St Louis. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Daniel A. Rey see patients?
- Medicare's clinician data lists 7 practice locations, including Saint Clair, MO, Wentzville, MO and Warrenton, MO. Call before your visit to confirm the address.
- What is Daniel A. Rey's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Daniel A. Rey accept Medicare assignment?
- Yes. Medicare's clinician data says Daniel A. Rey 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 Daniel A. Rey?
- (636) 629-3300, as listed in official Medicare / NPI Registry data.
- What is Daniel A. Rey's NPI number?
- 1336288356. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Daniel A. Rey works
Medicare's Facility Affiliation Data lists Daniel A. Rey at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Mercy Hospital St LouisSaint Louis, MO · Acute Care Hospital · CCN 260020
Practice locations
Addresses where Daniel A. Rey is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 7; the Medicare profile lists all.
- 1001 Cardwell StSaint Clair, MO 63077 (636) 629‑3300
- 1502 W Meyer RdWentzville, MO 63385 (636) 698‑6266
- 521 Anwijo WayWarrenton, MO 63383 (636) 456‑6103
- 615 S New Ballas RdSaint Louis, MO 63141
- 615 S New Ballas Rd, Mercy Jfk ClinicSt Louis, MO 63141 (314) 251‑6382
Group practices
Medicare enrollment lists Daniel A. Rey as a member of these groups (CMS data updated 2026-10-02).
- Mercy Clinic East Communities571 clinicians in the group
- Mercy Hospitals East Communities98 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Missouri
Clinicians with the same Medicare primary specialty in Missouri — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of South Florida College Of Medicine |
| Graduation year | 1987 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1336288356 |
| 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