Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

John P Ferrell, OD

Optometrist in Webster City, IA · enumerated 2005 · practices at Wolfe Clinic Eye Centers, Lc.

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

National Provider Identifier

1831181668

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name John P Ferrell

Credential OD

Sex Male

Practice address 1620 Superior St, Unit 3, Webster City, IA, 50595

Phone (515) 832-2401

Enumeration date Aug 18, 2005

Last updated in NPPES Mar 6, 2020

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License 02089 (IA) Primary

OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses. About the OD credential

Other identifiers

Identifier	Type	State	Issuer
410047715	Other	IA	RAILROAD MEDICARE

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 specialty is John Ferrell?

John Ferrell is registered in NPPES with the primary taxonomy of Optometrist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

Other providers at this practice address

Browse all →

Wolfe Clinic Eye Centers, Lc Optometrist · Webster City, IA NPI 1740249978

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-03-06.