NPI age
15 years
Enumerated 2010-07-01
● Active
Type 1 · Individual
DR. Ewan Douglas Johnson, MD, PHD
Johnson is 1 of 41 internal medicine providers in Tomball and 1 of 12343 in Texas.
Primary specialty
Internal Medicine
Plus 2 subspecialties
Licensed in
TX
1 state
Status
Active
No deactivations on record
Last NPPES update
2021-06-11
Source: monthly bulk 2026-05
Sole proprietor
No
May be part of a larger org
How this provider compares
Across 12343 active internal medicine providers in Texas.
NPI age
15 years
↓ 2 yr below median (17 yr)
State licenses
1 state
12% of peers hold multiple states
Subspecialties
2
In the 33% of peers with subspecialties
NPI lifetime · 2010 → 2026
2010-07Enumerated in NPPES
2010
2026
Where they practice
Practice location
13414 Medical Complex Dr Ste 6
Tomball, TX 773753333
Mailing address
13414 Medical Complex Dr Ste 6
Tomball, TX 773753333
Additional practice locations
1 secondary location on file with NPPES.
Location 2
9359 Hwy 37 Suite D
Corpus Christi, TX 784097840
Specialties
-
Internal Medicine PrimaryA 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,...
-
Emergency MedicineAn emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department....
-
Internal MedicineAn internist who specializes in the diagnosis and treatment of all types of cancer and other benign and malignant tumors. This specialist decides on and administers therapy for these malignancies as well as consults with surgeons and...
Practice context
Part of a multi-provider practice. 1 other active provider shares this practice address in NPPES.
Recently enumerated nearby: 1 new internal medicine provider has been added in Tomball in the last 180 days.
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- Confirm the NPI on NPPES.The CMS registry is the system of record. Open NPPES →
- Check the state license is currently active.State licensing boards publish current status; NPPES does not.
- Confirm payer enrollment if billing.NPI presence does not guarantee active enrollment with Medicare, Medicaid, or commercial payers.