Quick answers
- Where does John Williams see patients?
- Medicare's clinician data lists 2 practice locations, including St Petersburg, FL and Pinellas Park, FL. Call before your visit to confirm the address.
- What is John Williams's specialty?
- Medicare lists Pathology as the primary specialty.
- Does John Williams accept Medicare assignment?
- Yes. Medicare's clinician data says John Williams 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 Williams?
- (727) 345-5500, as listed in official Medicare / NPI Registry data.
- What is John Williams's NPI number?
- 1598744393. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where John Williams is enrolled with Medicare (CMS data updated 2026-10-02).
- 3901 66 St N, Suite 201St Petersburg, FL 33709 (727) 345‑5500
- 8455 66th St NPinellas Park, FL 33781 (727) 545‑0109
Group practices
Medicare enrollment lists John Williams as a member of these groups (CMS data updated 2026-10-02).
- West Central Gastroenterology LLP84 clinicians in the group
- Surgical Pathology Laboratories PA9 clinicians in the group
Specialties
- Pathologyprimary
Other pathologists in St Petersburg
Clinicians with the same Medicare primary specialty in St Petersburg, FL — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | At Still University Of Health Sciences, College Of Osteo Med, Kirksville |
| Graduation year | 1983 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1598744393 |
| 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
- 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