Quick answers
- Which hospitals does Larry D. Deffenbaugh work at?
- Medicare's official clinician data lists Larry D. Deffenbaugh at 1 hospital: Mercy Hospital Carthage. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Larry D. Deffenbaugh see patients?
- Medicare's clinician data lists 2 practice locations, including Carthage, MO and Cassville, MO. Call before your visit to confirm the address.
- What is Larry D. Deffenbaugh's specialty?
- Medicare lists Gastroenterology as the primary specialty.
- Does Larry D. Deffenbaugh accept Medicare assignment?
- Yes. Medicare's clinician data says Larry D. Deffenbaugh 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 Larry D. Deffenbaugh?
- (417) 782-7722, as listed in official Medicare / NPI Registry data.
- What is Larry D. Deffenbaugh's NPI number?
- 1447290622. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Larry D. Deffenbaugh works
Medicare's Facility Affiliation Data lists Larry D. Deffenbaugh at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Mercy Hospital CarthageCarthage, MO · Critical Access Hospital · CCN 261338
Practice locations
Addresses where Larry D. Deffenbaugh is enrolled with Medicare (CMS data updated 2026-10-02).
- 3125 Dr Russell Smith WayCarthage, MO 64836
- 94 Main StCassville, MO 65625 (417) 782‑7722
Group practices
Medicare enrollment lists Larry D. Deffenbaugh as a member of this group (CMS data updated 2026-10-02).
- Mercy Clinic Joplin LLC295 clinicians in the group
Specialties
- Gastroenterologyprimary
Other gastroenterologists in Missouri
Clinicians with the same Medicare primary specialty in Missouri — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | University Of Kansas School Of Med (kc/wich/sal) |
| Graduation year | 1974 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1447290622 |
| 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