Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. James Marczak, PA-C

Physician Assistant in Glendale, AZ · enumerated 2007.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1720123805

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Mr. James Marczak

Credential PA-C

Sex Male

Practice address 18275 N 59th Ave Ste 138, Glendale, AZ, 85308

Phone (602) 843-2300

Fax (602) 843-2310

Enumeration date Feb 20, 2007

Last updated in NPPES Nov 18, 2025

Taxonomy & licenses

363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License 1910 (AZ) Primary

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1720123805 active?

Yes, as of the latest NPPES snapshot, NPI 1720123805 is active (record last updated 2025-11-18).

How do I verify James Marczak's NPI record?

Cross-check NPI 1720123805 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

Browse all →

Ramon Pascua Family Medicine Physician · Glendale, AZ NPI 1629027248 Arrowhead Internal Medicine Geriatric Medicine (Internal Medicine) Physician · Glendale, AZ NPI 1598782369 Wellcare, LLC Primary Care Nurse Practitioner · Glendale, AZ NPI 1366469140 Clarissa Saenz Physician Assistant · Glendale, AZ NPI 1467960773 Junnesh Moushi Family Nurse Practitioner · Glendale, AZ NPI 1083395966 April Jackson Family Nurse Practitioner · Glendale, AZ NPI 1376373134 Mason Ross Physician Assistant · Glendale, AZ NPI 1083420780 Kodee Avery Physician Assistant · Glendale, AZ NPI 1891501599

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-11-18.