Quick answers
- Which hospitals does Anup Katyal work at?
- Medicare's official clinician data lists Anup Katyal at 2 hospitals: HSHS St Elizabeth's Hospital and Mercy Hospital St Louis. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Anup Katyal see patients?
- Medicare's clinician data lists 6 practice locations, including Chesterfield, MO, Saint Louis, MO and St Louis, MO. Call before your visit to confirm the address.
- What is Anup Katyal's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Anup Katyal accept Medicare assignment?
- Yes. Medicare's clinician data says Anup Katyal 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 Anup Katyal?
- (636) 237-4200, as listed in official Medicare / NPI Registry data.
- What is Anup Katyal's NPI number?
- 1104858265. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Anup Katyal works
Medicare's Facility Affiliation Data lists Anup Katyal at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- HSHS St Elizabeth's HospitalO Fallon, IL · Acute Care Hospital · CCN 140187
- Mercy Hospital St LouisSaint Louis, MO · Acute Care Hospital · CCN 260020
Practice locations
Addresses where Anup Katyal is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 6; the Medicare profile lists all.
- 15740 S Outer 40 RdChesterfield, MO 63017 (636) 237‑4200
- 615 S New Ballas RdSaint Louis, MO 63141 (314) 251‑6000
- 615 S New Ballas RdSt Louis, MO 63141
- 621 S New Ballas RdSaint Louis, MO 63141 (314) 251‑4966
- 621 S New Ballas Rd, 228aSt Louis, MO 63141
Group practices
Medicare enrollment lists Anup Katyal as a member of these groups (CMS data updated 2026-10-02).
- Mercy Aco Clinical Services Inc170 clinicians in the group
- Mercy Clinic Adult Critical Care LLC60 clinicians in the group
- Mercy Clinic Pulmonology - St. Louis, LLC24 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Chesterfield
Clinicians with the same Medicare primary specialty in Chesterfield, MO — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1990 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1104858265 |
| 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