Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Meredith Gretzinger, DPT

Physical Therapist in Littleton, CO · enumerated 2022.

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

National Provider Identifier

1871212092

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Registry record

Entity type Individual (Type 1)

Name Meredith Gretzinger

Credential DPT

Sex Female

Practice address 8500 W Crestline Ave Unit G5, Littleton, CO, 80123

Phone (303) 971-0500

Fax (303) 932-7076

Enumeration date Aug 22, 2022

Last updated in NPPES Aug 25, 2022

Taxonomy & licenses

225100000X Physical Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License PTL.0018587 (CO) Primary

DPT · Doctor of Physical Therapy: A physical therapist holding the clinical doctorate now standard for the profession. About the DPT credential

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 specialty is Meredith Gretzinger?

Meredith Gretzinger is registered in NPPES with the primary taxonomy of Physical Therapist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-08-25.