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Ronald A Seff, MD, PA

Ophthalmology Physician in Baltimore, MD · enumerated 2007 · authorized official Ronald Seff, President.

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

National Provider Identifier

1285758532

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Registry record

Entity type Organization (Type 2)
Legal business name Ronald A Seff, MD, PA
Practice address 19 Fontana Ln, Suite 108, Baltimore, MD, 21237
Phone (410) 574-4040
Fax (410) 574-1255
Enumeration date Mar 19, 2007
Last updated in NPPES Mar 13, 2008

Taxonomy & classification

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License D16254 (MD) Primary
332H00000X Eyewear Supplier Suppliers · License D16254 (MD) Secondary

Authorized official

Name Ronald Seff
Title President
Phone (410) 574-4040

Other identifiers

Identifier Type State Issuer
938Q Other MD MEDICARE P TEN
3103013P0000 Medicaid MD -

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.

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Frequently asked questions

What is a Type 2 NPI?
A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.
What type of organization is Ronald A Seff, MD, PA?
Ronald A Seff, MD, PA is registered in NPPES as a Ophthalmology Physician (its primary provider taxonomy).

Providers at this address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-03-13.