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

Dr. Gregory Jack Hardin, MD

Individual provider Hospitalist Physician · NPI 1457677213

Dr. Gregory Jack Hardin, MD is an Internal Medicine in Louisville, Kentucky. Graduated from University of Kentucky College of Medicine in 2010, 16 years ago. Practices with Signal Health Inc, a 6-clinician group and accepts Medicare assignment. Licensed in Kentucky and New York.

Years since qualifying
16
Trained at
University of Kentucky College of Medicine
Licensed in
KY, NY
In the registry since
2010
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

312 S 4th St Ste 700
Louisville, KY 40202-3046
Phone: (502) 804-5495
Fax: (833) 563-1715
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 59143 (KY)
Hospitalist Physician Taxonomy 208M00000X · Licence 271063 (NY)

Record details

NPI number1457677213
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 19, 2010
Last updated in NPPESJanuary 30, 2026
Certification dateJanuary 30, 2026

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolUNIVERSITY OF KENTUCKY COLLEGE OF MEDICINE
Graduated 2010 (16 years in practice)
Group practice Signal Health Inc — 6 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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