NPI age
5 years
Enumerated 2021-01-04
● Active
Type 1 · Individual
John D Sadler, CLINICAL CHEMIST
Sadler is 1 of 30 pathology providers in Houston and 1 of 88 in Texas.
Primary specialty
Pathology
Licensed in
TX
1 state
Status
Active
No deactivations on record
Last NPPES update
2021-01-04
Source: monthly bulk 2026-05
Sole proprietor
Yes
Solo practice on file
How this provider compares
Across 88 active pathology providers in Texas.
NPI age
5 years
↓ 14 yr below median (19 yr)
State licenses
1 state
10% of peers hold multiple states
Subspecialties
0
30% of peers hold subspecialties
NPI lifetime · 2021 → 2026
2021-01Enumerated in NPPES
2021
2026
Where they practice
Practice location
4106 Tidewater Dr
Houston, TX 770454338
Mailing address
4106 Tidewater Dr
Houston, TX 770454338
Specialties
-
Pathology PrimaryA pathologist deals with the causes and nature of disease and contributes to diagnosis, prognosis and treatment through knowledge gained by the laboratory application of the biologic, chemical and physical sciences. A pathologist uses...
Practice context
Part of a multi-provider practice. 3 other active providers share this practice address in NPPES.
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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.
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