Quick answers
- Which hospitals does David L. John work at?
- Medicare's official clinician data lists David L. John at 5 hospitals: Cedar County Memorial Hospital, Cox Barton County Hospital, Ellett Memorial Hospital, Golden Valley Memorial Hospital and Harrison County Community Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does David L. John see patients?
- Medicare's clinician data lists 5 practice locations, including Lamar, MO and Appleton City, MO. Call before your visit to confirm the address.
- What is David L. John's specialty?
- Medicare lists Internal Medicine as the primary specialty, and also Rheumatology.
- Does David L. John accept Medicare assignment?
- Yes. Medicare's clinician data says David L. John 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 David L. John?
- (417) 681-5266, as listed in official Medicare / NPI Registry data.
- What is David L. John's NPI number?
- 1568424174. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where David L. John works
Medicare's Facility Affiliation Data lists David L. John at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Cedar County Memorial HospitalEl Dorado Springs, MO · Critical Access Hospital · CCN 261323
- Cox Barton County HospitalLamar, MO · Critical Access Hospital · CCN 261325
- Ellett Memorial HospitalAppleton City, MO · Critical Access Hospital · CCN 261301
- Golden Valley Memorial HospitalClinton, MO · Acute Care Hospital · CCN 260175
- Harrison County Community HospitalBethany, MO · Critical Access Hospital · CCN 261312
Practice locations
Addresses where David L. John is enrolled with Medicare (CMS data updated 2026-10-02).
- 29 NW 1st LnLamar, MO 64759
- 29 NW 1st Ln, Attn Medical One Clinic CredentiallingLamar, MO 64759
- 29 NW 1st Ln, Cox Barton County Medical OneLamar, MO 64759 (417) 681‑5266
- 408 E 7th StAppleton City, MO 64724 (660) 476‑2121
- 408 E 7th St, Ac Rural Health ClinicAppleton City, MO 64724 (660) 476‑2121
Group practices
Medicare enrollment lists David L. John as a member of these groups (CMS data updated 2026-10-02).
- Cox Barton County Hospital28 clinicians in the group
- Community Memorial Hospital District19 clinicians in the group
- Barton County Memorial Hospital18 clinicians in the group
- CBCH LLC18 clinicians in the group
Specialties
- Internal Medicineprimary
- Rheumatologyalso
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 Missouri, Kansas City, School Of Medicine |
| Graduation year | 1977 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1568424174 |
| 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