Quick answers
- Which hospitals does John S. Mays work at?
- Medicare's official clinician data lists John S. Mays at 5 hospitals: Alton Memorial Hospital, Barnes Jewish Hospital, Barnes-Jewish West County Hospital, Christian Hospital Northeast and Missouri Baptist Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John S. Mays see patients?
- Medicare's clinician data lists 6 practice locations, including Saint Louis, MO, Creve Coeur, MO and Ballwin, MO. Call before your visit to confirm the address.
- What is John S. Mays's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does John S. Mays accept Medicare assignment?
- Yes. Medicare's clinician data says John S. Mays 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.
- Does John S. Mays offer telehealth?
- Medicare's clinician data says John S. Mays offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for John S. Mays?
- (314) 273-0195, as listed in official Medicare / NPI Registry data.
- What is John S. Mays's NPI number?
- 1083108062. 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 S. Mays works
Medicare's Facility Affiliation Data lists John S. Mays at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Alton Memorial HospitalAlton, IL · Acute Care Hospital · CCN 140002
- Barnes Jewish HospitalSaint Louis, MO · Acute Care Hospital · CCN 260032
- Barnes-Jewish West County HospitalCreve Coeur, MO · Acute Care Hospital · CCN 260162
- Christian Hospital NortheastSaint Louis, MO · Acute Care Hospital · CCN 260180
- Missouri Baptist Medical CenterSaint Louis, MO · Acute Care Hospital · CCN 260108
Practice locations
Addresses where John S. Mays is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 6; the Medicare profile lists all.
- 1110 Highlands Plaza Dr ESaint Louis, MO 63110 (314) 273‑0195
- 12788 Olive BlvdCreve Coeur, MO 63141
- 15425 Manchester Rd, Suite 28Ballwin, MO 63011 (636) 220‑6969
- 2630 Hwy KO Fallon, MO 63368 (636) 240‑5454
- 9594 Manchester RdSaint Louis, MO 63119 (314) 274‑6314
Group practices
Medicare enrollment lists John S. Mays as a member of these groups (CMS data updated 2026-10-02).
- Physician Groups LC521 clinicians in the group
- Physical Therapy Spine and Sports Medicine LLC129 clinicians in the group
- Elite Physical Therapy of Creve Coeur LLC91 clinicians in the group
- Arnold Physical Therapy and Sports Medicine LLC83 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Saint Louis
Clinicians with the same Medicare primary specialty in Saint Louis, MO — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Tennessee, Hsc, College Of Medicine |
| Graduation year | 2018 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1083108062 |
| 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