Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Cynthia L Johnston, MD

Individual provider Emergency Medicine Physician · NPI 1831162239

Cynthia L Johnston, MD is an Emergency Medicine Physician in Marathon, Florida. Practices as a sole proprietor. Licensed in Florida.

Licensed in
FL
In the registry since
2006
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

3301 Overseas Hwy
Marathon, FL 33050-2329
Phone: (305) 743-5533
Fax: (305) 289-0630
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence ME94206 (FL)

Record details

NPI number1831162239
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorYes
NPI enumeratedFebruary 8, 2006
Last updated in NPPESSeptember 5, 2007
Mailing addressPo Box 500369, Marathon, FL 33050-0369

Other providers in Marathon