Quick answers
- Which hospitals does Joshua Gruenbaum work at?
- Medicare's official clinician data lists Joshua Gruenbaum at 2 hospitals: Ascension St Vincent Hospital and Mount Carmel St Ann's. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Joshua Gruenbaum see patients?
- Medicare's clinician data lists 3 practice locations, including Westerville, OH, Lewis Center, OH and Indianapolis, IN. Call before your visit to confirm the address.
- What is Joshua Gruenbaum's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Joshua Gruenbaum accept Medicare assignment?
- Yes. Medicare's clinician data says Joshua Gruenbaum 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 Joshua Gruenbaum?
- (614) 898-4000, as listed in official Medicare / NPI Registry data.
- What is Joshua Gruenbaum's NPI number?
- 1295296648. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Joshua Gruenbaum works
Medicare's Facility Affiliation Data lists Joshua Gruenbaum at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Ascension St Vincent HospitalIndianapolis, IN · Acute Care Hospital · CCN 150084
- Mount Carmel St Ann'sWesterville, OH · Acute Care Hospital · CCN 360012
Practice locations
Addresses where Joshua Gruenbaum is enrolled with Medicare (CMS data updated 2026-10-02).
- 500 S Cleveland AveWesterville, OH 43081 (614) 898‑4000
- 7100 Graphics WayLewis Center, OH 43035 (740) 953‑4000
- 8602 Allisonville RdIndianapolis, IN 46250 (317) 703‑1970
Group practices
Medicare enrollment lists Joshua Gruenbaum as a member of these groups (CMS data updated 2026-10-02).
- Cep America LLC1,023 clinicians in the group
- Cep America - Ohio LLC17 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Westerville
Clinicians with the same Medicare primary specialty in Westerville, OH — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Graduation year | 2019 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1295296648 |
| 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