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

Dr. Don Ryan Duff, MD

Individual provider Internal Medicine Physician · NPI 1154325900

Dr. Don Ryan Duff, MD is an Internal Medicine in Louisville, Kentucky. Graduated from University of Louisville School of Medicine in 1986, 40 years ago. Practices with Bluegrass Kidney Consultants PSC, a 19-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Kentucky.

Years since qualifying
40
Trained at
University of Louisville School of Medicine
Licensed in
KY
In the registry since
2005
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

3999 Dutchmans Ln Ste 4A
Louisville, KY 40207-4745
Phone: (502) 365-2655
Fax: (502) 365-2770
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 727 Mount Tabor Rd Ste A, New Albany, IN 47150-6951 — (812) 981-3111

Specialties & licences

Nephrology Physician (primary) Taxonomy 207RN0300X · Licence 25228 (KY)
Internal Medicine Physician Taxonomy 207R00000X · Licence 25228 (KY)

Record details

NPI number1154325900
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 9, 2005
Last updated in NPPESAugust 27, 2024
Certification dateAugust 27, 2024

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolUNIVERSITY OF LOUISVILLE SCHOOL OF MEDICINE
Graduated 1986 (40 years in practice)
Group practice Bluegrass Kidney Consultants Psc — 19 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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