Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
John Grzechowiak, APN
Nurse Practitioner in Clementon, NJ · enumerated 2023.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1477257095
See something wrong? Report a correction
Registry record
Entity type Individual (Type 1)
Name John Grzechowiak
Credential APN
Sex Male
Practice address 1238 Chews Landing Rd, Clementon, NJ, 08021
Phone (856) 545-9500
Enumeration date Mar 28, 2023
Last updated in NPPES Jul 17, 2025
Taxonomy & licenses
363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 26NJ01443700 (NJ) 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.
Frequently asked questions
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is John Grzechowiak?
John Grzechowiak is registered in NPPES with the primary taxonomy of Nurse Practitioner. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-07-17.