Quick answers
- Which hospitals does Lennon W. Gregor work at?
- Medicare's official clinician data lists Lennon W. Gregor at 1 hospital: Indiana University Health. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Lennon W. Gregor see patients?
- Medicare's clinician data lists 1 practice location in McCordsville, IN. Call before your visit to confirm the address.
- What is Lennon W. Gregor's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Lennon W. Gregor accept Medicare assignment?
- Yes. Medicare's clinician data says Lennon W. Gregor 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 Lennon W. Gregor offer telehealth?
- Medicare's clinician data says Lennon W. Gregor offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Lennon W. Gregor?
- (888) 484-3258, as listed in official Medicare / NPI Registry data.
- What is Lennon W. Gregor's NPI number?
- 1619618865. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Lennon W. Gregor works
Medicare's Facility Affiliation Data lists Lennon W. Gregor at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Indiana University HealthIndianapolis, IN · Acute Care Hospital · CCN 150056
Practice locations
Addresses where Lennon W. Gregor is enrolled with Medicare (CMS data updated 2026-10-02).
- 5986 Main StMcCordsville, IN 46055 (888) 484‑3258
Group practices
Medicare enrollment lists Lennon W. Gregor as a member of this group (CMS data updated 2026-10-02).
- IU Health Medical Group LLC4,462 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in McCordsville
Clinicians with the same Medicare primary specialty in McCordsville, IN — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Indiana University School Of Medicine |
| Graduation year | 2022 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1619618865 |
| 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