Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Christy M Greiner, RDH

Dental Hygienist in Baltimore, MD · enumerated 2021.

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

National Provider Identifier

1073187480

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Registry record

Entity type Individual (Type 1)

Name Christy M Greiner

Credential RDH

Sex Female

Practice address 8510 Philadelphia Rd Ste A, Baltimore, MD, 21237

Phone (410) 574-2800

Fax (410) 238-0026

Enumeration date May 19, 2021

Last updated in NPPES May 19, 2021

Taxonomy & licenses

124Q00000X Dental Hygienist Dental Providers · License 5761 (MD) 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

What is the NPI number for Christy Greiner?

The National Provider Identifier (NPI) for Christy Greiner is 1073187480, a Type 1 (individual) record in the CMS NPPES registry.

Where does Christy Greiner practice?

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

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-05-19.