Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Dr. John Louis Ryan, MD

Individual provider Infectious Disease Physician · NPI 1821046095

Dr. John Louis Ryan, MD is an Infectious Disease Physician in New York, New York. Practices as a sole proprietor. Licensed in Massachusetts and New York.

Licensed in
MA, NY
In the registry since
2006
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

450 E 29th St Kadmon Corporation Llc
New York, NY 10016-8367
Phone: (212) 308-6000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Infectious Disease Physician (primary) Taxonomy 207RI0200X · Licence 268115 (NY)
Infectious Disease Physician Taxonomy 207RI0200X · Licence 82080 (MA)

Record details

NPI number1821046095
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedMay 4, 2006
Last updated in NPPESJuly 22, 2014

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