NPI age
6 years
Enumerated 2020-03-24
● Active
Type 1 · Individual
Zachary Jon Haag, DO
Haag is 1 of 504 radiology providers in Dallas and 1 of 3776 in Texas.
Primary specialty
Radiology
Licensed in
TX
1 state
Status
Active
No deactivations on record
Last NPPES update
2026-01-30
Source: monthly bulk 2026-05
Sole proprietor
No
May be part of a larger org
How this provider compares
Across 3776 active radiology providers in Texas.
NPI age
6 years
↓ 13 yr below median (19 yr)
State licenses
1 state
18% of peers hold multiple states
Subspecialties
0
36% of peers hold subspecialties
NPI lifetime · 2020 → 2026
2020-03Enumerated in NPPES
2020
2026
Where they practice
Practice location
3500 Gaston Ave
Dallas, TX 752462017
Mailing address
Po Box 678253
Dallas, TX 752678253
Specialties
-
Radiology PrimaryA radiologist who utilizes x-ray, radionuclides, ultrasound and electromagnetic radiation to diagnose and treat disease.
Practice context
Part of a multi-provider practice. 812 other active providers share this practice address in NPPES.
Recently enumerated nearby: 2 new radiology providers have been added in Dallas in the last 180 days.
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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.