NPI age
20 years
Enumerated 2005-09-07
● Active
Type 1 · Individual
Mark M Hayden, MD
Hayden is 1 of 10 emergency medicine providers in Harlingen and 1 of 421 in Texas.
Primary specialty
Emergency Medicine
Licensed in
TX
1 state
Status
Active
No deactivations on record
Last NPPES update
2007-07-08
Source: monthly bulk 2026-05
Sole proprietor
No
May be part of a larger org
How this provider compares
Across 421 active emergency medicine providers in Texas.
NPI age
20 years
≈ at median (19 yr)
State licenses
1 state
6% of peers hold multiple states
Subspecialties
0
30% of peers hold subspecialties
NPI lifetime · 2005 → 2026
2005-09Enumerated in NPPES
2005
2026
Where they practice
Practice location
2101 Pease St
Harlingen, TX 785508307
Mailing address
Po Box 5357
Norman, OK 730705357
Specialties
-
Emergency Medicine PrimaryAn emergency medicine physician who specializes in non-hospital based emergency medical services (e.g., disaster site, accident scene, transport vehicle, etc.) to provide pre-hospital assessment, treatment, and transport patients.
Practice context
Part of a multi-provider practice. 185 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.