Quick answers
- Which hospitals does Ali Husain work at?
- Medicare's official clinician data lists Ali Husain at 5 hospitals: Mercy Hospital South, Mercy Hospital St Louis, Mercy Hospital Washington, SSM St Joseph Health Center and SSM St Joseph Hospital West. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Ali Husain see patients?
- Medicare's clinician data lists 5 practice locations, including Lake Saint Louis, MO, Saint Louis, MO and Bridgeton, MO. Call before your visit to confirm the address.
- What is Ali Husain's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Ali Husain accept Medicare assignment?
- Yes. Medicare's clinician data says Ali Husain 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 Ali Husain?
- (636) 625-5200, as listed in official Medicare / NPI Registry data.
- What is Ali Husain's NPI number?
- 1154525707. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Ali Husain works
Medicare's Facility Affiliation Data lists Ali Husain at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Mercy Hospital SouthSaint Louis, MO · Acute Care Hospital · CCN 260077
- Mercy Hospital St LouisSaint Louis, MO · Acute Care Hospital · CCN 260020
- Mercy Hospital WashingtonWashington, MO · Acute Care Hospital · CCN 260052
- SSM St Joseph Health CenterSaint Charles, MO · Acute Care Hospital · CCN 260005
- SSM St Joseph Hospital WestLake Saint Louis, MO · Acute Care Hospital · CCN 260200
Practice locations
Addresses where Ali Husain is enrolled with Medicare (CMS data updated 2026-10-02).
- 100 Medical PlzLake Saint Louis, MO 63367 (636) 625‑5200
- 10010 Kennerly RdSaint Louis, MO 63128 (314) 525‑1328
- 12303 De Paul DrBridgeton, MO 63044 (314) 344‑6000
- 615 S New Ballas RdSaint Louis, MO 63141 (314) 251‑6339
- 901 E 5th StWashington, MO 63090 (636) 239‑8231
Group practices
Medicare enrollment lists Ali Husain as a member of these groups (CMS data updated 2026-10-02).
- Sound Physicians of Illinois LLC193 clinicians in the group
- St Anthonys Physician Organization Hospitalist Services LC144 clinicians in the group
- Mercy Clinic Adult Hospitalists - St. Louis, LLC137 clinicians in the group
- Mercy Clinic Adult Hospitalists - Washington, LLC32 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Lake Saint Louis
Clinicians with the same Medicare primary specialty in Lake Saint Louis, MO — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2002 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1154525707 |
| 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