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

Dr. Timothy Unterreiner, DNP

Certified Registered Nurse Anesthetist in Montgomery, OH · enumerated 2025.

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

National Provider Identifier

1154214096

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Registry record

Entity type Individual (Type 1)

Name Dr. Timothy Unterreiner

Credential DNP

Sex Male

Practice address Montgomery, OH, 45242

Phone (513) 865-1111

Enumeration date May 30, 2025

Last updated in NPPES May 30, 2025

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

Taxonomy & licenses

367500000X Certified Registered Nurse Anesthetist Physician Assistants & Advanced Practice Nursing Providers · License APRN.CRNA.0021331 (OH) Primary

DNP · Doctor of Nursing Practice: A clinical doctorate for advanced practice nurses. About the DNP 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 is the NPI number for Timothy Unterreiner?

The National Provider Identifier (NPI) for Timothy Unterreiner is 1154214096, a Type 1 (individual) record in the CMS NPPES registry.

Where does Timothy Unterreiner practice?

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

Other providers at this practice address

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Larissa Kahle Physician Assistant · Cincinnati, OH NPI 1386647261 Anesthesia Group Practice, Inc Anesthesiology Physician · Montgomery, OH NPI 1417951948 Michael Rudemiller Hospitalist Physician · Cincinnati, OH NPI 1396742516 Ann Tuttle Anesthesiology Physician · Cincinnati, OH NPI 1679571137 Pamela Webb Anesthesiology Physician · Cincinnati, OH NPI 1801894274 Kathryn Binder Certified Registered Nurse Anesthetist · Cincinnati, OH NPI 1326046392 Susan Dolph Certified Registered Nurse Anesthetist · Cincinnati, OH NPI 1316945397 Cynthia Rodriguez Certified Registered Nurse Anesthetist · Cincinnati, OH NPI 1164420022

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-05-30.