NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. James A Knupp, MD

Ophthalmology Physician in Toledo, OH · enumerated 2006.

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

National Provider Identifier

1548211774

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Dr. James A Knupp
Credential MD
Sex Male
Practice address 1000 Regency Ct Ste 100, Toledo, OH, 43623
Phone (419) 882-0588
Fax (419) 885-3070
Enumeration date May 12, 2006
Last updated in NPPES Nov 19, 2025

Taxonomy & licenses

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License 35042466 (OH) Primary
207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License 036075866 (IL) Secondary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier Type State Issuer
0086973 Medicaid OH -
036075866 Medicaid IL -

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 James Knupp?
The National Provider Identifier (NPI) for James Knupp is 1548211774, a Type 1 (individual) record in the CMS NPPES registry.
Where does James Knupp practice?
The practice location on file with NPPES is in Toledo, OH. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-11-19.