Quick answers
- Which hospitals does Othniel S. Doolittle work at?
- Medicare's official clinician data lists Othniel S. Doolittle at 1 hospital: Harrisburg Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Othniel S. Doolittle see patients?
- Medicare's clinician data lists 1 practice location in Harrisburg, IL. Call before your visit to confirm the address.
- What is Othniel S. Doolittle's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Othniel S. Doolittle accept Medicare assignment?
- Yes. Medicare's clinician data says Othniel S. Doolittle 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 Othniel S. Doolittle?
- (618) 253-7671, as listed in official Medicare / NPI Registry data.
- What is Othniel S. Doolittle's NPI number?
- 1386965499. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Othniel S. Doolittle works
Medicare's Facility Affiliation Data lists Othniel S. Doolittle at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Harrisburg Medical CenterHarrisburg, IL · Acute Care Hospital · CCN 140210
Practice locations
Addresses where Othniel S. Doolittle is enrolled with Medicare (CMS data updated 2026-10-02).
- 100 Dr Warren Tuttle DrHarrisburg, IL 62946 (618) 253‑7671
Group practices
Medicare enrollment lists Othniel S. Doolittle as a member of this group (CMS data updated 2026-10-02).
- Trinity Medical Staffing LLC36 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Harrisburg
Clinicians with the same Medicare primary specialty in Harrisburg, IL — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2010 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1386965499 |
| 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