NPI age
20 years
Enumerated 2006-05-11
● Active
Type 1 · Individual
Lon Andrew Walder, D.O.
Walder is 1 of 5 internal medicine providers in Eagle Pass and 1 of 2301 in Texas.
Primary specialty
Internal Medicine
Plus 1 subspecialty
Licensed in
TX
1 state
Status
Active
No deactivations on record
Last NPPES update
2024-09-11
Source: monthly bulk 2026-05
Sole proprietor
No
May be part of a larger org
How this provider compares
Across 2301 active internal medicine providers in Texas.
NPI age
20 years
≈ at median (19 yr)
State licenses
1 state
11% of peers hold multiple states
Subspecialties
1
In the 37% of peers with subspecialties
NPI lifetime · 2006 → 2026
2006-05Enumerated in NPPES
2006
2026
Where they practice
Practice location
4018 El Indio Hwy
Eagle Pass, TX 788526690
Mailing address
2525 N Veterans Blvd
Eagle Pass, TX 788523302
Specialties
-
Internal Medicine PrimaryAn internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threatening, abnormal heartbeat rhythms.
-
Internal MedicineAn area of medicine within the subspecialty of cardiology, which uses specialized imaging and other diagnostic techniques to evaluate blood flow and pressure in the coronary arteries and chambers of the heart and uses technical...
Identifiers
| Type | Value | Notes |
|---|---|---|
| 05 (TX) | 1360869-02 | |
| 01 (TX) | 4376993 | AETNA PROVIDER ID |
| 05 (TX) | 136086909 | |
| 05 (TX) | 1360869-05 | |
| 05 (TX) | 1360869-11 | |
| 01 (TX) | 86462K | BCBS |
Practice context
Part of a multi-provider practice. 10 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.
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