Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Ms. Gretchen Diane Lamberth, OTR

Occupational Therapist in Sierra Vista, AZ · enumerated 2007 · practices at Sierra Vista Public Schools.

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

National Provider Identifier

1326175225

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Ms. Gretchen Diane Lamberth

Credential OTR

Sex Female

Practice address Sierra Vista, AZ, 85635

Phone (520) 515-2790

Fax (520) 515-2726

Enumeration date Feb 27, 2007

Last updated in NPPES Jul 8, 2007

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

225X00000X Occupational Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 0478 (AZ) Primary

Other identifiers

Identifier	Type	State	Issuer
614851	Medicaid	AZ	-

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 Gretchen Lamberth practice?

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

What is the NPI number for Gretchen Lamberth?

The National Provider Identifier (NPI) for Gretchen Lamberth is 1326175225, 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 2007-07-08.