NPI age
19 years
Enumerated 2007-01-03
● Active
Type 1 · Individual
DR. Donald Ray Lazarus JR., MD
Lazarus is 1 of 247 internal medicine providers in Houston and 1 of 1318 in Texas.
Primary specialty
Internal Medicine
Plus 2 subspecialties
Licensed in
TX
1 state
Status
Active
No deactivations on record
Last NPPES update
2014-06-18
Source: monthly bulk 2026-05
Sole proprietor
No
May be part of a larger org
How this provider compares
Across 1318 active internal medicine providers in Texas.
NPI age
19 years
≈ at median (18 yr)
State licenses
1 state
15% of peers hold multiple states
Subspecialties
2
In the 57% of peers with subspecialties
NPI lifetime · 2007 → 2026
2007-01Enumerated in NPPES
2007
2026
Where they practice
Practice location
6620 Main St Ste 1225, Baylor Clinic
Houston, TX 770302331
Mailing address
6620 Main St Ste 11c.08, Baylor College Of Medicine
Houston, TX 770302348
Specialties
-
Internal Medicine PrimaryAn internist who treats diseases of the lungs and airways. The pulmonologist diagnoses and treats cancer, pneumonia, pleurisy, asthma, occupational and environmental diseases, bronchitis, sleep disorders, emphysema and other complex...
-
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,...
-
Internal MedicineAn internist who diagnoses, treats and supports patients with multiple organ dysfunction. This specialist may have administrative responsibilities for intensive care units and may also facilitate and coordinate patient care among the...
Practice context
Part of a multi-provider practice. 5 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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