Lon Walder, D.O.
NPI 1184674822 · Cardiovascular Disease Physician · Eagle Pass, TX
Enrolled with Medicare as Practitioner - Interventional Cardiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Lon Walder, D.O. is a Cardiovascular Disease Physician provider in Eagle Pass, TX (NPI 1184674822).
Provider details
- NPI number
- 1184674822
- Entity type
- Individual
- Primary specialty
- Cardiovascular Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- No
- License
- J3931 (TX)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
145 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 55 | $8 |
| Ultrasound of Heart With Color-Depicted Blood Flow, Rate, Direction and Valve Function93306 | 37 | $65 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 32 | $165 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 21 | $113 |
Typical Medicare-allowed amounts for these services range $8–$165 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 15 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Hydralazine Hcl | 123 | 51 |
| Losartan Potassium | 115 | 49 |
| Amlodipine Besylate | 80 | 35 |
| Atenolol | 65 | 26 |
| Clonidine Hcl | 51 | 18 |
| Doxazosin Mesylate | 45 | 26 |
| Carvedilol | 40 | 19 |
| Metoprolol Succinate |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-05-11
- Last updated
- 2024-09-11
- Certified
- 2024-09-11
Frequently asked questions
- What is Lon Walder's NPI number?
- Lon Walder's National Provider Identifier (NPI) is 1184674822, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Lon Walder's specialty?
- Lon Walder is listed in the NPPES registry with a primary specialty of Cardiovascular Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Lon Walder located?
- Lon Walder's practice location on file with NPPES is 4018 El Indio Hwy, Eagle Pass, TX 78852-6690.
- What is Lon Walder's phone number?
- The practice phone number listed in the NPPES registry for Lon Walder is (830) 872-3460.
- Does Lon Walder accept Medicare?
- Lon Walder is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Lon Walder's NPI active?
- Yes — Lon Walder's NPI (1184674822) is active in the NPPES registry as of the last update on 2024-09-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.