Aaron Len Marquardt, M.D.
Hospitalist Physician · West Monroe, LA
Aaron Len Marquardt, M.D. is a hospitalist physician with a practice address in West Monroe, Louisiana, and NPI 1538349733, issued on Nov 6, 2007. Check the license (Louisiana MD.204182, as entered in NPPES) on the Louisiana State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Aaron Len Marquardt
- Credential
- M.D.
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License number
- MD.204182 LA
Self-reported in NPPES; status is on the state search - Practice location
- 503 Mcmillan RD, West Monroe, LA 71291
- Phone
- (318) 329-4744
- Enumerated
- Nov 6, 2007
- Record last updated
- Sep 16, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (318) 329-4719
- Medicare enrollment
- Enrolled (PECOS I20110316000598); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 340 in Louisiana → Look up another NPI →
Also registered at 503 Mcmillan RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- William Alexander, MDHospitalist Physician1194736447
- Clara Allen, CRNACertified Registered Nurse Anesthetist1710209994
- James Atchison, MDDiagnostic Radiology Physician1881622397
- Ashley Barmore, COTAOccupational Therapy Assistant1780468124
- Stanley Bienasz, M.D.Anesthesiology Physician1023105996
Verify Aaron Len Marquardt in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersLouisiana State Board of Medical Examiners
Search for license MD.204182Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
8% more Medicare Part D claims than the average hospitalist physician in 2024
562 Medicare Part D claims for 155 beneficiaries, against an average of 521 among the 21,613 providers of this specialty who prescribed in Part D. Brand-name drugs were 20% of claims. 32 claims were for opioids.
Most prescribed
- Eliquis39 claims
- Entresto25 claims
- Metoprolol Tartrate24 claims
- Atorvastatin Calcium23 claims
- Carvedilol22 claims
- Albuterol Sulfate Hfa19 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
- Northern Louisiana Emergency Physicians, LLPRuston, LA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Aaron Len Marquardt among 340 hospitalist physician records in Louisiana
Aaron Len Marquardt, M.D. is one of 340 hospitalist physician records with a practice address in Louisiana. 91% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 14% of them.
- NPI issued2007 · 14% of these records are older, 77% newer
- In a Medicare fileYes · 91% of these records are
- In the CMS Doctors and Clinicians fileYes · 80% of these records are
- Graduated2007 · median 2014 among the 271 with a school on file
- Record last updated2013 · 44% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a Louisiana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hospitalist Physician providers in Louisiana
There are 340 hospitalist physician records in Louisiana.
All 340 in Louisiana → Every provider in West Monroe → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- William Alexander, MDWest Monroe, LA 712911194736447
- Mark Boersma, M.D.West Monroe, LA 712911518104439
- Glenn Figueroa, M.D.West Monroe, LA 712911437149408
- Robert Garcia, MDWest Monroe, LA 712911548226418
- Stephen Horne, MDWest Monroe, LA 712911083625313
- Matthew Lacaze, NPCalhoun, LA 712251568380061
- Andy Tran, M.D.Bastrop, LA 712201982890836
- Gajendra Chaudhary, M.D.Monroe, LA 712011487387916
Common questions
What is Aaron Len Marquardt, M.D.'s NPI number?
Aaron Len Marquardt, M.D.'s National Provider Identifier (NPI) is 1538349733, issued on Nov 6, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Aaron Len Marquardt, M.D. located?
The NPPES record lists a practice address at 503 Mcmillan RD, West Monroe, LA, 71291. Phone: (318) 329-4744. Providers update this record themselves, so call before visiting.
How can I verify Aaron Len Marquardt, M.D.'s license?
NPPES lists Louisiana license number MD.204182, as entered by the provider. Search the Louisiana State Board of Medical Examiners at https://www.lsbme.la.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Aaron Len Marquardt, M.D. prescribe under Medicare Part D?
In 2024, Aaron Len Marquardt, M.D. had 562 Medicare Part D claims for 155 beneficiaries; the average among hospitalist physician prescribers was 521. 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.