Quick answers
- Which hospitals does John Kowalczyk work at?
- Medicare's official clinician data lists John Kowalczyk at 5 hospitals: Glendale Adventist Medical Center, Glendale Memorial Hospital & Health Center, Hollywood Presbyterian Medical Center, L A Downtown Medical Center and PIH Health Good Samaritan Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John Kowalczyk see patients?
- Medicare's clinician data lists 2 practice locations, including Los Angeles, CA and North Hollywood, CA. Call before your visit to confirm the address.
- What is John Kowalczyk's specialty?
- Medicare lists Urology as the primary specialty.
- Does John Kowalczyk accept Medicare assignment?
- Yes. Medicare's clinician data says John Kowalczyk 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 John Kowalczyk?
- (213) 977-1176, as listed in official Medicare / NPI Registry data.
- What is John Kowalczyk's NPI number?
- 1548254089. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where John Kowalczyk works
Medicare's Facility Affiliation Data lists John Kowalczyk at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Glendale Adventist Medical CenterGlendale, CA · Acute Care Hospital · CCN 050239
- Glendale Memorial Hospital & Health CenterGlendale, CA · Acute Care Hospital · CCN 050058
- Hollywood Presbyterian Medical CenterLos Angeles, CA · Acute Care Hospital · CCN 050063
- L A Downtown Medical CenterLos Angeles, CA · Acute Care Hospital · CCN 050763
- PIH Health Good Samaritan HospitalLos Angeles, CA · Acute Care Hospital · CCN 050471
Practice locations
Addresses where John Kowalczyk is enrolled with Medicare (CMS data updated 2026-10-02).
- 1127 Wilshire Blvd, Suite 1618Los Angeles, CA 90017 (213) 977‑1176
- 12134 Victory Blvd, Suite CNorth Hollywood, CA 91606 (818) 762‑8702
Group practices
Medicare enrollment lists John Kowalczyk as a member of these groups (CMS data updated 2026-10-02).
- Superclinic Professionals Medical Corp a California Corporation13 clinicians in the group
- Signature Medical Clinics Inc8 clinicians in the group
Specialties
- Urologyprimary
Other urologists in Los Angeles
Clinicians with the same Medicare primary specialty in Los Angeles, CA — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | Chicago College Of Osteopathy |
| Graduation year | 1985 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1548254089 |
| 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