Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. John Tilynn Thompson, M.D.

Ophthalmology Physician in Baltimore, MD · enumerated 2006.

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

National Provider Identifier

1073584439

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Registry record

Entity type Individual (Type 1)

Name Dr. John Tilynn Thompson

Credential M.D.

Sex Male

Practice address 6569 N Charles St Ste 605, Baltimore, MD, 21204

Phone (410) 296-9700

Fax (410) 296-9705

Enumeration date Feb 1, 2006

Last updated in NPPES Jan 22, 2016

Taxonomy & licenses

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License D0025547 (MD) Primary

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
640487101	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.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1073584439 active?

Yes, as of the latest NPPES snapshot, NPI 1073584439 is active (record last updated 2016-01-22).

How do I verify John Thompson's NPI record?

Cross-check NPI 1073584439 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

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David Baranano Ophthalmology Physician · Baltimore, MD NPI 1407992050

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-01-22.