Quick answers
- Which hospitals does John D. Long work at?
- Medicare's official clinician data lists John D. Long at 4 hospitals: Clinch Valley Medical Center, Riverside Doctors' Hospital of Williamsburg, Riverside Regional Medical Center and Riverside Walter Reed Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John D. Long see patients?
- Medicare's clinician data lists 3 practice locations, including Williamsburg, VA, Richlands, VA and Gloucester, VA. Call before your visit to confirm the address.
- What is John D. Long's specialty?
- Medicare lists Gastroenterology as the primary specialty, and also Internal Medicine.
- Does John D. Long accept Medicare assignment?
- Yes. Medicare's clinician data says John D. Long 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. Long?
- (757) 253-0051, as listed in official Medicare / NPI Registry data.
- What is John D. Long's NPI number?
- 1386619393. 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. Long works
Medicare's Facility Affiliation Data lists John D. Long at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Clinch Valley Medical CenterRichlands, VA · Acute Care Hospital · CCN 490060
- Riverside Doctors' Hospital of WilliamsburgWilliamsburg, VA · Acute Care Hospital · CCN 490143
- Riverside Regional Medical CenterNewport News, VA · Acute Care Hospital · CCN 490052
- Riverside Walter Reed HospitalGloucester, VA · Acute Care Hospital · CCN 490130
Practice locations
Addresses where John D. Long is enrolled with Medicare (CMS data updated 2026-10-02).
- 120 Kings Way, Suite 3300 and 3500Williamsburg, VA 23185 (757) 253‑0051
- 6719 Governor Gc Peery Hwy, Suite 1000Richlands, VA 24641 (276) 596‑6715
- 7547 Medical Dr, Suite 2300Gloucester, VA 23061 (804) 221‑0750
Group practices
Medicare enrollment lists John D. Long as a member of these groups (CMS data updated 2026-10-02).
- Riverside Physician Services Inc797 clinicians in the group
- Clinch Professional Physician Services LLC43 clinicians in the group
Specialties
- Gastroenterologyprimary
- Internal Medicinealso
Other gastroenterologists in Williamsburg
Clinicians with the same Medicare primary specialty in Williamsburg, VA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Eastern Virginia Medical School |
| Graduation year | 1989 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1386619393 |
| 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