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

Dr. Sergio A Diaz, MD

Individual provider Internal Medicine Physician · NPI 1417138439

Dr. Sergio A Diaz, MD is an Internal Medicine in Johnson City, Tennessee. Qualified in 1997, 29 years ago. Practices with State of Franklin Healthcare Associates, PLLC, a 265-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Tennessee.

Years since qualifying
29
Licensed in
TN
In the registry since
2007
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

301 Med Tech Pkwy Ste 240
Johnson City, TN 37604-2641
Phone: (423) 794-5520
Fax: (423) 282-6940
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 444 Clinchfield St Ste 201, Kingsport, TN 37660-3863 — (423) 230-2100

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 43908 (TN)

Record details

NPI number1417138439
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedNovember 19, 2007
Last updated in NPPESFebruary 14, 2025
Certification dateFebruary 14, 2025
Mailing addressPo Box 632476, Cincinnati, OH 45263-2476

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 1997 (29 years in practice)
Group practice State Of Franklin Healthcare Associates, Pllc — 265 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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