Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Diane D Gerwin, R PH

Pharmacist in Cincinnati, OH · enumerated 2006.

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

National Provider Identifier

1841393220

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Registry record

Entity type Individual (Type 1)

Name Ms. Diane D Gerwin

Credential R PH

Sex Female

Practice address 2136 W 8th St, Cincinnati, OH, 45204

Phone (513) 357-2700

Fax (513) 357-2750

Enumeration date Sep 7, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

183500000X Pharmacist Pharmacy Service Providers · License 03-1-10861 (OH) Primary

RPH · Registered Pharmacist: A licensed pharmacist registered with a state board of pharmacy. About the RPH 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

How do I verify Diane Gerwin's NPI record?

Cross-check NPI 1841393220 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1841393220 active?

Yes, as of the latest NPPES snapshot, NPI 1841393220 is active (record last updated 2007-07-08).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.