Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Grethel John, APN

Q: What is the NPI number for Grethel John?

The National Provider Identifier (NPI) for Grethel John is 1770241663, a Type 1 (individual) record in the CMS NPPES registry.

Nurse Practitioner in Livingston, NJ · enumerated 2021.

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

National Provider Identifier

1770241663

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Ms. Grethel John

Credential APN

Sex Female

Practice address 94 Old Short Hills Rd, Livingston, NJ, 07039

Phone (973) 322-6500

Enumeration date Dec 7, 2021

Last updated in NPPES Dec 10, 2024

Taxonomy & licenses

363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 26NJ01236200 (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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Grethel John practice?

The practice location on file with NPPES is in Livingston, NJ. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Grethel John?

The National Provider Identifier (NPI) for Grethel John is 1770241663, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-12-10.