NPI age
12 years
Enumerated 2013-06-10
● Active
Type 1 · Individual
John David Andersen, D.O.
Andersen is 1 of 416 pathology providers in Houston and 1 of 1597 in Texas.
Primary specialty
Pathology
Plus 1 subspecialty
Licensed in
TX, MD
2 states
Status
Active
No deactivations on record
Last NPPES update
2025-06-16
Source: monthly bulk 2026-05
Sole proprietor
No
May be part of a larger org
How this provider compares
Across 1597 active pathology providers in Texas.
NPI age
12 years
↓ 7 yr below median (19 yr)
State licenses
2 states
Top 83% — 16% of peers are multi-state
Subspecialties
0
37% of peers hold subspecialties
NPI lifetime · 2013 → 2026
2013-06Enumerated in NPPES
2013
2026
Where they practice
Practice location
6720 Bertner Ave
Houston, TX 770302604
Mailing address
6201 Greenleigh Ave
Middle River, MD 212202004
Additional practice locations
1 secondary location on file with NPPES.
Location 2
600 N Wolfe St
Baltimore, MD 212870005
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. 423 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 →
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