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Grabenstein Family Practice

Family Medicine Physician in Clarksville, TN · enumerated 2006 · authorized official William Grabenstein, Owner.

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

National Provider Identifier

1891861274

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Registry record

Entity type Organization (Type 2)
Legal business name Grabenstein Family Practice
Practice address 1822 Memorial Drive, Clarksville, TN, 37043
Phone (931) 552-8010
Fax (931) 551-3118
Enumeration date Nov 28, 2006
Last updated in NPPES Jul 29, 2015

Taxonomy & classification

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name William Grabenstein
Title Owner
Phone (931) 552-8010

Other identifiers

Identifier Type State Issuer
3728817 Medicaid TN -
4102303 Other TN BLUE CROSS
4102307 Other TN BLUE CROSS GROUP

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 a Type 2 NPI?
A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.
What type of organization is Grabenstein Family Practice?
Grabenstein Family Practice is registered in NPPES as a Family Medicine Physician (its primary provider taxonomy).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-07-29.