NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Nicholas Grenzig

School Psychologist in Youngstown, OH · enumerated 2014.

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

National Provider Identifier

1215357009

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Mr. Nicholas Grenzig
Sex Male
Practice address 100 Debartolo Pl, Suite 220, Youngstown, OH, 44512
Phone (330) 965-7828
Enumeration date Apr 21, 2014
Last updated in NPPES Apr 21, 2014

Taxonomy & licenses

103TS0200X School Psychologist Behavioral Health & Social Service Providers · License OH1232680 (OH) 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 Nicholas Grenzig practice?
The practice location on file with NPPES is in Youngstown, OH. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Nicholas Grenzig?
The National Provider Identifier (NPI) for Nicholas Grenzig is 1215357009, 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 2014-04-21.