Quick answers
- Which hospitals does Justin M. Sweeney work at?
- Medicare's official clinician data lists Justin M. Sweeney at 4 hospitals: Mercy Hospital Jefferson, Mercy Hospital South, Mercy Hospital St Louis and Mercy Hospital Washington. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Justin M. Sweeney see patients?
- Medicare's clinician data lists 3 practice locations, including Saint Louis, MO and Washington, MO. Call before your visit to confirm the address.
- What is Justin M. Sweeney's specialty?
- Medicare lists Neurosurgery as the primary specialty.
- Does Justin M. Sweeney accept Medicare assignment?
- Yes. Medicare's clinician data says Justin M. Sweeney 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 Justin M. Sweeney?
- (314) 251-6364, as listed in official Medicare / NPI Registry data.
- What is Justin M. Sweeney's NPI number?
- 1689871998. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Justin M. Sweeney works
Medicare's Facility Affiliation Data lists Justin M. Sweeney at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Mercy Hospital JeffersonCrystal City, MO · Acute Care Hospital · CCN 260023
- 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
Practice locations
Addresses where Justin M. Sweeney is enrolled with Medicare (CMS data updated 2026-10-02).
- 621 S New Ballas Rd, Suite 298aSaint Louis, MO 63141 (314) 251‑6364
- 621 S New Ballas Rd, Suite 3005bSaint Louis, MO 63141 (314) 567‑5850
- 851 E 5th St, Suite 108Washington, MO 63090 (636) 861‑7870
Group practices
Medicare enrollment lists Justin M. Sweeney as a member of this group (CMS data updated 2026-10-02).
- Mercy Clinic Surgical Specialists LLC182 clinicians in the group
Specialties
- Neurosurgeryprimary
Other neurosurgeons in Saint Louis
Clinicians with the same Medicare primary specialty in Saint Louis, MO — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Saint Louis University School Of Medicine |
| Graduation year | 2004 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1689871998 |
| 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