Quick answers
- Which hospitals does Ranjani P. Ramanathan work at?
- Medicare's official clinician data lists Ranjani P. Ramanathan at 5 hospitals: Barnes Jewish Hospital, Barnes-Jewish St Peters Hospital, Christian Hospital Northeast, Missouri Baptist Medical Center and Progress West Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Ranjani P. Ramanathan see patients?
- Medicare's clinician data lists 3 practice locations, including Saint Peters, MO, Saint Louis, MO and O Fallon, MO. Call before your visit to confirm the address.
- What is Ranjani P. Ramanathan's specialty?
- Medicare lists Endocrinology as the primary specialty, and also Internal Medicine.
- Does Ranjani P. Ramanathan accept Medicare assignment?
- Yes. Medicare's clinician data says Ranjani P. Ramanathan 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 Ranjani P. Ramanathan offer telehealth?
- Medicare's clinician data says Ranjani P. Ramanathan offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Ranjani P. Ramanathan?
- (636) 916-7272, as listed in official Medicare / NPI Registry data.
- What is Ranjani P. Ramanathan's NPI number?
- 1639212335. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Ranjani P. Ramanathan works
Medicare's Facility Affiliation Data lists Ranjani P. Ramanathan at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Barnes Jewish HospitalSaint Louis, MO · Acute Care Hospital · CCN 260032
- Barnes-Jewish St Peters HospitalSaint Peters, MO · Acute Care Hospital · CCN 260191
- Christian Hospital NortheastSaint Louis, MO · Acute Care Hospital · CCN 260180
- Missouri Baptist Medical CenterSaint Louis, MO · Acute Care Hospital · CCN 260108
- Progress West HospitalOfallon, MO · Acute Care Hospital · CCN 260219
Practice locations
Addresses where Ranjani P. Ramanathan is enrolled with Medicare (CMS data updated 2026-10-02).
- 10 Hospital Dr, Suite 100Saint Peters, MO 63376 (636) 916‑7272
- 1110 Highlands Plaza Dr ESaint Louis, MO 63110 (314) 273‑0195
- 2630 Hwy KO Fallon, MO 63368 (636) 240‑5454
Group practices
Medicare enrollment lists Ranjani P. Ramanathan as a member of this group (CMS data updated 2026-10-02).
- Physician Groups LC521 clinicians in the group
Specialties
- Endocrinologyprimary
- Internal Medicinealso
Other endocrinologists in Missouri
Clinicians with the same Medicare primary specialty in Missouri — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2002 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1639212335 |
| 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