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

Dr. Mark Louis Merlin, MD

Individual provider Specialist · NPI 1033193800

Dr. Mark Louis Merlin, MD is a Radiation Oncology in Decatur, Georgia. Graduated from Louisiana State University School of Medicine in New Orleans in 1993, 33 years ago. Practices with North Atlanta Professional Services LLC, a 423-clinician group and accepts Medicare assignment. Licensed in Georgia.

Years since qualifying
33
Trained at
Louisiana State University School of Medicine in New Orleans
Licensed in
GA
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

2349 Lawrenceville Hwy
Decatur, GA 30033-3143
Phone: (404) 320-1550
Fax: (404) 728-1081
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Radiation Oncology Physician (primary) Taxonomy 2085R0001X · Licence 39178 (GA)
Specialist Taxonomy 174400000X · Licence 039178 (GA)

Record details

NPI number1033193800
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedDecember 5, 2005
Last updated in NPPESNovember 3, 2015

Medicare enrollment

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

Medicare specialtyRADIATION ONCOLOGY
Medical schoolLOUISIANA STATE UNIVERSITY SCHOOL OF MEDICINE IN NEW ORLEANS
Graduated 1993 (33 years in practice)
Group practice North Atlanta Professional Services Llc — 423 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations5 on file with Medicare

Other providers in Decatur