Quick answers
- Which hospitals does John D. Hammock work at?
- Medicare's official clinician data lists John D. Hammock at 5 hospitals: Blessing Hospital, Illini Community Hospital, MC Donough District Hospital, Memorial Hospital and Scotland County Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John D. Hammock see patients?
- Medicare's clinician data lists 4 practice locations, including Hannibal, MO, Quincy, IL and Memphis, MO. Call before your visit to confirm the address.
- What is John D. Hammock's specialty?
- Medicare lists Cardiovascular Disease (Cardiology) as the primary specialty, and also Cardiac Electrophysiology and Internal Medicine.
- Does John D. Hammock accept Medicare assignment?
- Yes. Medicare's clinician data says John D. Hammock 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 John D. Hammock?
- (217) 223-8400, as listed in official Medicare / NPI Registry data.
- What is John D. Hammock's NPI number?
- 1912082975. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where John D. Hammock works
Medicare's Facility Affiliation Data lists John D. Hammock at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Blessing HospitalQuincy, IL · Acute Care Hospital · CCN 140015
- Illini Community HospitalPittsfield, IL · Critical Access Hospital · CCN 141315
- MC Donough District HospitalMacomb, IL · Acute Care Hospital · CCN 140089
- Memorial HospitalCarthage, IL · Critical Access Hospital · CCN 141305
- Scotland County HospitalMemphis, MO · Critical Access Hospital · CCN 261310
Practice locations
Addresses where John D. Hammock is enrolled with Medicare (CMS data updated 2026-10-02).
- 100 Medical DrHannibal, MO 63401 (217) 223‑8400
- 1005 Broadway StQuincy, IL 62301 (217) 223‑8400
- 450 E Sigler AveMemphis, MO 63555 (217) 223‑8400
- 927 Broadway StQuincy, IL 62301 (217) 224‑6423
Group practices
Medicare enrollment lists John D. Hammock as a member of this group (CMS data updated 2026-10-02).
- Blessing Hospital421 clinicians in the group
Specialties
Find other Cardiovascular Disease (Cardiology) doctors in Missouri →
Other cardiologists in Hannibal
Clinicians with the same Medicare primary specialty in Hannibal, MO — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Southern Illinois University School Of Medicine |
| Graduation year | 2002 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1912082975 |
| 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