Quick answers
- Which hospitals does James A. Petterchak work at?
- Medicare's official clinician data lists James A. Petterchak at 5 hospitals: Barnes Jewish Hospital, Barnes-Jewish St Peters Hospital, Missouri Baptist Medical Center, Missouri Baptist Sullivan Hospital and Progress West Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does James A. Petterchak see patients?
- Medicare's clinician data lists 2 practice locations, including Saint Peters, MO and Saint Louis, MO. Call before your visit to confirm the address.
- What is James A. Petterchak's specialty?
- Medicare lists Pathology as the primary specialty.
- Does James A. Petterchak accept Medicare assignment?
- Yes. Medicare's clinician data says James A. Petterchak 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 James A. Petterchak?
- (636) 916-9650, as listed in official Medicare / NPI Registry data.
- What is James A. Petterchak's NPI number?
- 1598832032. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where James A. Petterchak works
Medicare's Facility Affiliation Data lists James A. Petterchak 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
- Missouri Baptist Medical CenterSaint Louis, MO · Acute Care Hospital · CCN 260108
- Missouri Baptist Sullivan HospitalSullivan, MO · Critical Access Hospital · CCN 261337
- Progress West HospitalOfallon, MO · Acute Care Hospital · CCN 260219
Practice locations
Addresses where James A. Petterchak is enrolled with Medicare (CMS data updated 2026-10-02).
- 10 Hospital DrSaint Peters, MO 63376 (636) 916‑9650
- 3015 N Ballas RdSaint Louis, MO 63131 (314) 996‑5000
Group practices
Medicare enrollment lists James A. Petterchak as a member of this group (CMS data updated 2026-10-02).
- Parkway Pathology Group Inc9 clinicians in the group
Specialties
- Pathologyprimary
Other pathologists in Missouri
Clinicians with the same Medicare primary specialty in Missouri — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Saint Louis University School Of Medicine |
| Graduation year | 1993 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1598832032 |
| 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