NPI age
20 years
Enumerated 2006-05-09
● Active
Type 1 · Individual
Joseph M Zasik, DO
Zasik is 1 of 18 internal medicine providers in Tyler and 1 of 479 in Texas.
Primary specialty
Internal Medicine
Plus 1 subspecialty
Licensed in
TX, PA
2 states
Status
Active
No deactivations on record
Last NPPES update
2023-02-03
Source: monthly bulk 2026-05
Sole proprietor
No
May be part of a larger org
How this provider compares
Across 479 active internal medicine providers in Texas.
NPI age
20 years
↑ 4 yr above median (16 yr)
State licenses
2 states
Top 67% — 32% of peers are multi-state
Subspecialties
1
In the 79% of peers with subspecialties
NPI lifetime · 2006 → 2026
2006-05Enumerated in NPPES
2006
2026
Where they practice
Practice location
619 S Fleishel Ave
Tyler, TX 757012004
Mailing address
Po Box 846098
Dallas, TX 752846098
Additional practice locations
3 secondary locations on file with NPPES.
Location 2
2026 S Jackson St
Jacksonville, TX 757665822
Location 3
18780 Interstate 20
Canton, TX 751033593
Location 4
800 E Dawson St
Tyler, TX 757012036
Specialties
-
Internal Medicine PrimaryAn 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...
-
Internal MedicineAn 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...
Identifiers
| Type | Value | Notes |
|---|---|---|
| 01 (TX) | 752616977180 | TRICARE |
| 01 (TX) | 75-2616977-123 | TRICARE |
| 01 | 290001397 | PALMETTO GBA |
| 01 (PA) | 01238401 | CAPITAL BLUE CROSS |
| 01 (TX) | 8BC074 | BCBS OF TEXAS |
| 05 (PA) | 0010727100003 | |
| 01 (PA) | 067826 | HIGHMARK BLUE SHIELD |
Multi-state credentialing: Licensed in 2 states. Useful context for credentialers building cross-state provider networks.
Practice context
Part of a multi-provider practice. 19 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.
- Confirm payer enrollment if billing.NPI presence does not guarantee active enrollment with Medicare, Medicaid, or commercial payers.