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

Individual provider Emergency Medicine Physician · NPI 1407010358

Dr. Mackenzie David Hay, MD is an Emergency Medicine in Knoxville, Tennessee. Graduated from University of Illinois College of Med (CHI/PEOR/ROCK/Chm-Urb) in 2006, 20 years ago. Practices with Sussex Emergency Associates LLC, a 7-clinician group and accepts Medicare assignment. Licensed in Tennessee.

Years since qualifying
20
Trained at
University of Illinois College of Med (CHI/PEOR/ROCK/Chm-Urb)
Licensed in
TN
In the registry since
2008
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

900 E Oak Hill Ave
Knoxville, TN 37917-4505
Phone: (865) 545-7573
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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 46388 (TN)
Family Medicine Physician Taxonomy 207Q00000X · Licence 46388 (TN)

Record details

NPI number1407010358
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 10, 2008
Last updated in NPPESMay 10, 2013

Medicare enrollment

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

Medicare specialtyEMERGENCY MEDICINE
Medical schoolUNIVERSITY OF ILLINOIS COLLEGE OF MED (CHI/PEOR/ROCK/CHM-URB)
Graduated 2006 (20 years in practice)
Group practice Sussex Emergency Associates Llc — 7 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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