NPI age
10 years
Enumerated 2016-04-01
● Active
Type 1 · Individual
DR. Justin Arunthamakun, M.D
Arunthamakun is 1 of 7 internal medicine providers in McKinney and 1 of 309 in Texas.
Primary specialty
Internal Medicine
Plus 2 subspecialties
Licensed in
TX, IN
2 states
Status
Active
No deactivations on record
Last NPPES update
2025-09-08
Source: monthly bulk 2026-05
Sole proprietor
Yes
Solo practice on file
How this provider compares
Across 309 active internal medicine providers in Texas.
NPI age
10 years
↓ 8 yr below median (18 yr)
State licenses
2 states
Top 79% — 20% of peers are multi-state
Subspecialties
1
In the 72% of peers with subspecialties
NPI lifetime · 2016 → 2026
2016-04Enumerated in NPPES
2016
2026
Where they practice
Practice location
5236 W University Dr Ste 4900
McKinney, TX 750718185
Mailing address
8414 Naab Rd
Indianapolis, IN 462601972
Additional practice locations
2 secondary locations on file with NPPES.
Location 2
1 Baylor Plz
Houston, TX 770303411
Location 3
8414 Naab Rd
Indianapolis, IN 462601972
Specialties
-
Internal Medicine PrimaryA field of special interest within the subspecialty of cardiovascular disease, specialty of Internal Medicine, which involves intricate technical procedures to evaluate heart rhythms and determine appropriate treatment for them.
-
Internal MedicineA physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer,...
Practice context
Solo or small practice. No other active providers share this practice address in NPPES. This provider is listed as a sole proprietor.
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- Confirm the NPI on NPPES.The CMS registry is the system of record. Open NPPES →
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