John James Kowalczyk, DO
Urology (CMS) · Los Angeles, CA
At a glance
1127 Wilshire Blvd, Los Angeles, CA 90017-3901
Published activity: Prostate resection. View counts and coverage
NPPES record updated Nov 22, 2022. Public records can lag behind changes at a practice.
Before you call: a quick checklist
- Are you accepting new patients?
- Do you accept my specific insurance plan?
- Do you provide the service I need at this address?
- Do I need a referral, and what is the earliest appointment?
Insurance participation and appointment availability are not established by these public records.
Medicare & insurance
Insurance participation is not established by these public records. Ask the practice and your insurer about your specific plan and this location.
How to check your coverage
Use your plan’s provider directory or the member-services number on your insurance card. Confirm the clinician, practice address, service, and whether a referral is required. A missing opt-out record does not establish Medicare acceptance.
Check the official Medicare directory ↗Practice location
1127 Wilshire Blvd Suite 805Los Angeles, CA 90017-3901
Additional reported practice locations
2211 W Magnolia Blvd Ste 260Burbank, CA 915061770
Phone: 2139771176
Fax: 2139770668 8223 Woodman Ave
Panorama City, CA 914025426
Phone: 8189799899 1500 S Central Ave Ste 200A
Glendale, CA 912042786
Phone: 2139771176
Fax: 2139770668 1517 Garfield Ave
Commerce, CA 900225421
Phone: 8189799899 1709 W Manchester Ave
Los Angeles, CA 900473033
Phone: 8189799899 435 Arden Ave Ste 530
Glendale, CA 912031140
Phone: 8189799899
Education & affiliations
- Medical / professional school
- Chicago College Of Osteopathy
- Graduation year
- 1985
- CMS specialties
- Urology
Practice groups
Reported hospital affiliations
- Glendale Adventist Medical Center Glendale, CA
- Glendale Mem Hospital & Hlth Center Glendale, CA
- Hollywood Presbyterian Medical Center Los Angeles, CA
- L A Downtown Medical Center Los Angeles, CA
- Pih Health Good Samaritan Hospital Los Angeles, CA
Graduation year does not establish years in practice. A reported affiliation does not establish employment, current admitting privileges, or insurance participation.
Source: CMS National Downloadable File · Published Oct 15, 2026.
Source: CMS Facility Affiliation Data · Published Oct 15, 2026.
Procedures in the public data
Reported activity can help you ask more informed questions about a practice’s services.
| Procedure category | Published Medicare activity |
|---|---|
| Prostate resection | 11 |
CMS uses a one-year claims window with a reporting lag. Counts cover the Medicare activity included by CMS, not all patients. “1–10” is a published range. Volume is not a quality or outcomes score. Coverage and methodology
Source: CMS Utilization Data · Published Oct 15, 2026.
Find providers with a similar service mix
Compare 2024 published Medicare activity in the same reported specialty, here or in another city.
Industry-reported general payments
Includes reported transfers of value, such as meals, travel, or consulting. Payments do not establish improper conduct or quality of care. Research funding and ownership values are excluded from this total.
See payment purposes and reporting companies
Reported purposes
| Purpose | Amount |
|---|---|
| Food and beverage | $1,873.92 |
Reporting companies
| Company | Amount |
|---|---|
| TELEFLEX LLC | $493.54 |
| ABBVIE INC. | $264.32 |
| PFIZER INC. | $227.70 |
| UROGEN PHARMA, INC. | $215.73 |
| JANSSEN BIOTECH, INC. | $125.13 |
| SUMITOMO PHARMA AMERICA, INC. | $81.58 |
| PROGENICS PHARMACEUTICALS, INC. | $67.88 |
| EDAP TECHNOMED INC | $62.04 |
| Other reporting companies | $336.00 |
Source: CMS 2025 payments grouped by covered recipient and nature of payments · Published Jun 30, 2026.
Professional details: NPI, taxonomy & registry record
Registry details
- Primary taxonomy
- Urology (CMS)
- Taxonomy code
- 208800000X
- Enumeration date
- Sep 9, 2005
- Record updated
- Nov 22, 2022
More registry details
- Provider type
- Individual · Type 1
- Reported credentials
- DO
Reported taxonomies and licenses
208800000X · Primary
License reported: 20A6818 CA
License numbers and credentials are reported to NPPES; HCPList does not independently verify them.
Practice location
1127 Wilshire BlvdSuite 805
Los Angeles, CA 90017-3901
- Phone
- (213) 977-1176
- Fax
- (213) 977-0668
Mailing address
1127 WILSHIRE BLVD STE 805LOS ANGELES, CA 900173909
Information may be outdated or incomplete. Confirm details directly with the practice. HCPList is an independent directory and is not affiliated with CMS.
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