NPI age
18 years
Enumerated 2007-06-12
● Active
Type 1 · Individual
DR. Smith L Johnston III, M.D.
Johnston is 1 of 17 preventive medicine providers in Houston and 1 of 73 in Texas.
Primary specialty
Preventive Medicine
Licensed in
TX
1 state
Status
Active
No deactivations on record
Last NPPES update
2007-07-08
Source: monthly bulk 2026-05
Sole proprietor
Yes
Solo practice on file
How this provider compares
Across 73 active preventive medicine providers in Texas.
NPI age
18 years
≈ at median (19 yr)
State licenses
1 state
12% of peers hold multiple states
Subspecialties
0
50% of peers hold subspecialties
NPI lifetime · 2007 → 2026
2007-06Enumerated in NPPES
2007
2026
Where they practice
Practice location
2101 Nasa Pkwy, Mail Code Sd26
Houston, TX 770583607
Mailing address
1402 Redway Ln
Houston, TX 770625411
Specialties
-
Preventive Medicine PrimaryAerospace medicine focuses on the clinical care, research, and operational support of the health, safety, and performance of crewmembers and passengers of air and space vehicles, together with the support personnel who assist operation...
Identifiers
| Type | Value | Notes |
|---|---|---|
| 01 (TX) | J3823 | TEXAS MEDICAL BOARD ID |
Practice context
Part of a multi-provider practice. 21 other active providers share this practice address in NPPES.
Recently enumerated nearby: 1 new preventive medicine provider has been added in Houston in the last 180 days.
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Request a quote →How to verify this provider
- 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.