Lon Andrew Walder, D.O.
Cardiovascular Disease Physician · Eagle Pass, TX
Lon Andrew Walder, D.O. is a cardiovascular disease physician with a practice address in Eagle Pass, Texas, and NPI 1184674822, issued on May 11, 2006. Check the license (Texas J3931, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Lon Andrew Walder
- Credential
- D.O.
- Primary taxonomy
- Cardiovascular Disease Physician 207RC0000X
- License number
- J3931 TX
Self-reported in NPPES; status is on the state search - Practice location
- 4018 EL Indio Hwy, Eagle Pass, TX 78852
- Phone
- (830) 872-3460
- Enumerated
- May 11, 2006
- Record last updated
- Sep 11, 2024
- Fax
- (830) 872-3470
- Medicaid IDs
- 1360869-02 TX
136086909 TX
1360869-05 TX
1360869-11 TX - Medicare enrollment
- Enrolled (PECOS I20090609000302); accepts Medicare assignment
- Medical or professional school
- Oklahoma State University College Of Osteopathic Medicine, 1986
- Entity
- Type 1 · individual
8 nearest cardiovascular disease physician records → All 1,603 in Texas → Look up another NPI →
Also registered at 4018 EL Indio Hwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mayralexandra Barreda, FNPFamily Nurse Practitioner1487450185
- Janet Boone, MDPediatrics Physician1437133949
- Herman Castillo, NPFamily Nurse Practitioner1699427534
- Yvette GuerraFamily Nurse Practitioner1215598289
- Rosa Herrera, APRNFamily Nurse Practitioner1477305522
- Marie James, M.D.Obstetrics & Gynecology Physician1235113853
Verify Lon Andrew Walder in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license J3931Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
72% fewer Medicare Part D claims than the average cardiovascular disease physician in 2024
849 Medicare Part D claims for 240 beneficiaries, against an average of 3,078 among the 20,728 providers of this specialty who prescribed in Part D. Brand-name drugs were 7% of claims.
Most prescribed
- Hydralazine Hcl123 claims
- Losartan Potassium115 claims
- Amlodipine Besylate80 claims
- Atenolol65 claims
- Clonidine Hcl51 claims
- Doxazosin Mesylate45 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- United Medical CentersEagle Pass, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Lon Andrew Walder among 1,603 cardiovascular disease physician records in Texas
Lon Andrew Walder, D.O. is one of 1,603 cardiovascular disease physician records with a practice address in Texas. 88% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 20% of them.
- NPI issued2006 · 20% of these records are older, 42% newer
- In a Medicare fileYes · 88% of these records are
- In the CMS Doctors and Clinicians fileYes · 76% of these records are
- Graduated1986 · median 1998 among the 1,219 with a school on file
- Record last updated2024 · 47% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RC0000X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Cardiovascular Disease Physician providers in Texas
There are 1,603 cardiovascular disease physician records in Texas.
All 1,603 in Texas → Every provider in Eagle Pass → Cardiovascular Disease Physician nationwide →
The 8 cardiovascular disease physician records with the nearest ZIP codes
- James Galizia, M.D.Eagle Pass, TX 788521437105863
- Imad Alwan, MDDel Rio, TX 788401811931512
- Mohamad Nawar, M.D.Del Rio, TX 788401013065382
- Toung Van, MD FACCDel Rio, TX 788401578764395
- Jamil Bitar, M.D.Uvalde, TX 788011982633970
- Shawn Ragbir, M.D.Uvalde, TX 788011831350990
- William Bailey, MDLa Grange, TX 789451871595538
- Phillip Burket, MDLa Grange, TX 789451891831020
Common questions
What is Lon Andrew Walder, D.O.'s NPI number?
Lon Andrew Walder, D.O.'s National Provider Identifier (NPI) is 1184674822, issued on May 11, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Lon Andrew Walder, D.O. located?
The NPPES record lists a practice address at 4018 EL Indio Hwy, Eagle Pass, TX, 78852. Phone: (830) 872-3460. Providers update this record themselves, so call before visiting.
How can I verify Lon Andrew Walder, D.O.'s license?
NPPES lists Texas license number J3931, as entered by the provider. Search the Texas Medical Board at https://profile.tmb.state.tx.us/Search.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Lon Andrew Walder, D.O. prescribe under Medicare Part D?
In 2024, Lon Andrew Walder, D.O. had 849 Medicare Part D claims for 240 beneficiaries; the average among cardiovascular disease physician prescribers was 3,078. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.