JOHN JAMES KOWALCZYK DO
NPI 1548254089
Urology in Los Angeles, CA
About John James Kowalczyk Do NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JOHN JAMES KOWALCZYK DO (NPI 1548254089) is an individual urology provider in Los Angeles, California, licensed in California (20A6818) and active in the NPI registry since September 2005. He is enrolled in Medicare PECOS, maintains 6 additional practice locations, and is a graduate of Chicago College Of Osteopathy (1985).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 6
Other Identifiers 2
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
John James Kowalczyk Do is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
6Medicare enrollment records show John Kowalczyk reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Los Angeles, CA 90017
- Reassigned Medicare billing, California enrollment
- 7 clinicians in this Medicare group
Los Angeles, CA 90057
- Reassigned Medicare billing, California enrollment
- 29 clinicians in this Medicare group
Glendale, CA 91203
- Reassigned Medicare billing, California enrollment
North Hollywood, CA 91606
- Reassigned Medicare billing, California enrollment
- 17 clinicians in this Medicare group
Bagdad, AZ 86321
- Reassigned Medicare billing, Arizona enrollment
- Also billed through NPI 1841282852 (Arizona)
- 36 clinicians in this Medicare group
El Monte, CA 91731
- Reassigned Medicare billing, California enrollment
- 30 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 18
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 90017 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
LOS ANGELES, CA 90017
LOS ANGELES, CA 90017
LOS ANGELES, CA 90017
LOS ANGELES, CA 90017
LOS ANGELES, CA 90017
LOS ANGELES, CA 90017
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is John Kowalczyk's NPI number?
The NPI number for John Kowalczyk is 1548254089. It was assigned to this individual provider in the NPPES registry on September 9, 2005.
Where is John Kowalczyk located?
John Kowalczyk practices at 1127 Wilshire Blvd Suite 805, Los Angeles, CA 90017. The listed phone number is (213) 977-1176.
What is John Kowalczyk's specialty?
The primary specialty registered for this NPI is Urology with taxonomy code 208800000X.
Is John Kowalczyk enrolled in Medicare?
Yes. John Kowalczyk is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for John Kowalczyk's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Kowalczyk reassigns Medicare benefits to 6 organizations: Signature Medical Clinics Inc (Los Angeles, CA), Los Angeles Clinica Medica General Medical Center, Inc. (Los Angeles, CA), Nobility Health, Inc. (Glendale, CA), Superclinic Professionals Medical Corp A California Corporation (North Hollywood, CA), Community Hospital Association, Inc. (Bagdad, AZ) and 1 more organization, listed in the Medicare section above. Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for John Kowalczyk's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does John Kowalczyk accept?
Health plans from Antidote Health Plan of Arizona, Inc. and Blue Cross Blue Shield of Arizona list John Kowalczyk as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for John Kowalczyk was last updated on November 22, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# John James Kowalczyk, DO · NPI 1548254089
Urology physician in Los Angeles, California. Individual provider, active in the CMS NPPES registry since September 9, 2005.
## Identity
- **NPI:** 1548254089 (Entity type: Individual)
- **Enumerated:** September 9, 2005
- **Primary specialty:** Urology · taxonomy 208800000X
- **State license:** 20A6818 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 1127 WILSHIRE BLVD, SUITE 805, Los Angeles, CA 90017-3901
- **Phone:** (213) 977-1176 · **Fax:** (213) 977-0668
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 6 organizations under Medicare reassignment (form CMS-855R): Signature Medical Clinics Inc (NPI 1942436548, Los Angeles, CA); Los Angeles Clinica Medica General Medical Center, Inc. (NPI 1265489751, Los Angeles, CA); Nobility Health, Inc. (NPI 1659969376, Glendale, CA); Superclinic Professionals Medical Corp A California Corporation (NPI 1326564212, North Hollywood, CA); Community Hospital Association, Inc. (NPI 1730445347, Bagdad, AZ); and 1 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Chicago College Of Osteopathy, class of 1985
## Record status
- **NPPES last updated:** November 22, 2022
- **Other identifiers:** Other 340018768; Medicaid 00AX68180 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1548254089) · Data from the CMS NPPES public registry.