Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Trihealth Os, LLC

Q: What is the NPI number for Trihealth Os, LLC?

The NPI for Trihealth Os, LLC is 1922419951, a Type 2 (organization) record in the CMS NPPES registry.

Orthopaedic Surgery Physician in Montgomery, OH · enumerated 2014 · authorized official Donna Nienaber, Sr. Vp Corp Counsel.

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

National Provider Identifier

1922419951

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Registry record

Entity type Organization (Type 2)

Legal business name Trihealth Os, LLC

Other name <Unavail>

Practice address 10547 Montgomery Rd, Suite 400, Montgomery, OH, 45242

Phone (513) 791-6611

Fax (513) 221-4848

Enumeration date May 13, 2014

Last updated in NPPES Dec 17, 2014

Taxonomy & classification

207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name Donna Nienaber

Title Sr. Vp Corp Counsel

Phone (513) 569-6062

Other identifiers

Identifier	Type	State	Issuer
201266090C	Medicaid	OH	-

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

Who is the authorized official for Trihealth Os, LLC?

NPPES lists Donna Nienaber (Sr. Vp Corp Counsel) as the authorized official for this organization.

What is the NPI number for Trihealth Os, LLC?

The NPI for Trihealth Os, LLC is 1922419951, a Type 2 (organization) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-12-17.