Quick answers
- Which hospitals does Steven Kolker work at?
- Medicare's official clinician data lists Steven Kolker at 2 hospitals: Saint John's Health Center and Tacoma General Allenmore Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Steven Kolker see patients?
- Medicare's clinician data lists 3 practice locations, including Orange, CA, Tacoma, WA and Santa Monica, CA. Call before your visit to confirm the address.
- What is Steven Kolker's specialty?
- Medicare lists Pathology as the primary specialty.
- Does Steven Kolker accept Medicare assignment?
- Yes. Medicare's clinician data says Steven Kolker 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 Steven Kolker?
- (714) 997-3000, as listed in official Medicare / NPI Registry data.
- What is Steven Kolker's NPI number?
- 1598726457. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Steven Kolker works
Medicare's Facility Affiliation Data lists Steven Kolker at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Saint John's Health CenterSanta Monica, CA · Acute Care Hospital · CCN 050290
- Tacoma General Allenmore HospitalTacoma, WA · Acute Care Hospital · CCN 500129
Practice locations
Addresses where Steven Kolker is enrolled with Medicare (CMS data updated 2026-10-02).
- 1201 W La Veta AveOrange, CA 92868 (714) 997‑3000
- 1901 S Union AveTacoma, WA 98405 (253) 459‑6200
- 2121 Santa Monica BlvdSanta Monica, CA 90404 (310) 829‑8101
Group practices
Medicare enrollment lists Steven Kolker as a member of these groups (CMS data updated 2026-10-02).
- Newport Harbor Pathology Medical Group Inc27 clinicians in the group
- Cascade Pathology Services Corp20 clinicians in the group
- Pathology Medical Group of Saint Johns8 clinicians in the group
Specialties
- Pathologyprimary
Other pathologists in Orange
Clinicians with the same Medicare primary specialty in Orange, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Georgetown University School Of Medicine |
| Graduation year | 1995 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1598726457 |
| 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