MR. AARON LEN MARQUARDT M.D.
NPI 1538349733
Hospitalist in West Monroe, LA
About Mr. Aaron Len Marquardt M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MR. AARON LEN MARQUARDT M.D. (NPI 1538349733) is an individual hospitalist provider in West Monroe, Louisiana, licensed in Louisiana (MD.204182) and active in the NPI registry since November 2007. He is enrolled in Medicare PECOS, is affiliated with Northern Louisiana Medical Center, and is a graduate of Other (2007).
NPPES Registry Identity
Specialties & Licenses 2
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Mr. Aaron Len Marquardt M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
8Medicare enrollment records show Aaron Marquardt reassigns Medicare billing to 8 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
West Monroe, LA 71291
- Reassigned Medicare billing, Louisiana enrollment
- 56 clinicians in this Medicare group
Ruston, LA 71270
- Reassigned Medicare billing, Louisiana enrollment
- 36 clinicians in this Medicare group
Ruston, LA 71270
- Reassigned Medicare billing, Louisiana enrollment
- 40 clinicians in this Medicare group
Ruston, LA 71270
- Reassigned Medicare billing, Louisiana enrollment
- 42 clinicians in this Medicare group
Minden, LA 71055
- Reassigned Medicare billing, Louisiana enrollment
- 83 clinicians in this Medicare group
Hattiesburg, MS 39402
- Reassigned Medicare billing, Louisiana enrollment
- 851 clinicians in this Medicare group
Humble, TX 77338
- Reassigned Medicare billing, Texas enrollment
- 2,009 clinicians in this Medicare group
Dallas, TX 75231
- Reassigned Medicare billing, Texas enrollment
- 1,208 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 7
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Northern Louisiana Medical Center
Acute Care Hospitals · Ruston, LAJackson Parish Hospital
Critical Access Hospitals · Jonesboro, LAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 71291 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Reported Quality Measures
Referred Medical Equipment & Supplies CMS DME claims 2
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Aaron Marquardt's NPI number?
The NPI number for Aaron Marquardt is 1538349733. It was assigned to this individual provider in the NPPES registry on November 6, 2007.
Where is Aaron Marquardt located?
Aaron Marquardt practices at 503 Mcmillan Rd, West Monroe, LA 71291. The listed phone number is (318) 329-4744.
What is Aaron Marquardt's specialty?
The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.
Is Aaron Marquardt enrolled in Medicare?
Yes. Aaron Marquardt is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Aaron Marquardt's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Aaron Marquardt reassigns Medicare benefits to 8 organizations: Hni Medical Services At Glenwood, LLC (West Monroe, LA), Green Clinic LLC (Ruston, LA), Clhg-Ruston LLC (Ruston, LA), Northern Louisiana Emergency Physicians LLP (Ruston, LA), Minden Physician Practices, LLC (Minden, LA) and 3 more organizations, listed in the Medicare section above. Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Aaron Marquardt's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Aaron Marquardt accept?
Health plans from Ambetter Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections, Ambetter from Superior HealthPlan and Blue Cross and Blue Shield of Texas and 2 other insurers list Aaron Marquardt as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Aaron Marquardt affiliated with any hospitals?
According to CMS data, Aaron Marquardt is affiliated with Northern Louisiana Medical Center and Jackson Parish Hospital.
When was this NPI record last updated?
The NPPES record for Aaron Marquardt was last updated on September 16, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Mr. Aaron Len Marquardt, M.D. · NPI 1538349733
Hospitalist physician in West Monroe, Louisiana. Individual provider, active in the CMS NPPES registry since November 6, 2007.
## Identity
- **NPI:** 1538349733 (Entity type: Individual)
- **Enumerated:** November 6, 2007
- **Primary specialty:** Hospitalist · taxonomy 208M00000X
- **State license:** MD.204182 (Louisiana)
- **Sole proprietor:** No
## Practice location
- **Address:** 503 MCMILLAN RD, West Monroe, LA 71291-5327
- **Phone:** (318) 329-4744 · **Fax:** (318) 329-4719
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 8 organizations under Medicare reassignment (form CMS-855R): Hni Medical Services At Glenwood, LLC (NPI 1669962064, West Monroe, LA); Green Clinic LLC (NPI 1578021093, Ruston, LA); Clhg-Ruston LLC (NPI 1821819665, Ruston, LA); Northern Louisiana Emergency Physicians LLP (NPI 1598995847, Ruston, LA); Minden Physician Practices, LLC (NPI 1699834473, Minden, LA); and 3 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2007
## Record status
- **NPPES last updated:** September 16, 2013
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Source: [NPI Profile](https://npiprofile.com/npi/1538349733) · Data from the CMS NPPES public registry.