DENNIS MICHAEL SULLIVAN M.D.
NPI 1861421265
Emergency Medicine in West Monroe, LA
About Dennis Michael Sullivan M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DENNIS MICHAEL SULLIVAN M.D. (NPI 1861421265) is an individual emergency medicine provider in West Monroe, Louisiana, licensed in Louisiana (017356) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS, is affiliated with Natchitoches Regional Medical Center, and is a graduate of Louisiana State University School Of Medicine In New Orleans (1983).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 3
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dennis Michael Sullivan M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
13Medicare enrollment records show Dennis Sullivan reassigns Medicare billing to 13 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Monroe, LA 71201
- Reassigned Medicare billing, Louisiana enrollment
- 67 clinicians in this Medicare group
Farmerville, LA 71241
- Reassigned Medicare billing, Louisiana enrollment
- 22 clinicians in this Medicare group
Ruston, LA 71270
- Reassigned Medicare billing, Louisiana enrollment
- 82 clinicians in this Medicare group
Rayville, LA 71269
- Reassigned Medicare billing, Louisiana enrollment
- 70 clinicians in this Medicare group
Winnsboro, LA 71295
- Reassigned Medicare billing, Louisiana enrollment
- 21 clinicians in this Medicare group
Winnsboro, LA 71295
- Reassigned Medicare billing, Louisiana enrollment
- 144 clinicians in this Medicare group
Minden, LA 71055
- Reassigned Medicare billing, Louisiana enrollment
- 61 clinicians in this Medicare group
Lake Providence, LA 71254
- Reassigned Medicare billing, Louisiana enrollment
- 78 clinicians in this Medicare group
Natchitoches, LA 71457
- Reassigned Medicare billing, Louisiana enrollment
- 17 clinicians in this Medicare group
Natchitoches, LA 71457
- Reassigned Medicare billing, Louisiana enrollment
- 68 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 5
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 4
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Natchitoches Regional Medical Center
Acute Care Hospitals · Natchitoches, LARichardson Medical Center
Acute Care Hospitals · Rayville, LAEast Carroll Parish Hospital
Acute Care Hospitals · Lake Providence, LAUnion General Hospital
Critical Access Hospitals · Farmerville, 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.
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 Dennis Sullivan's NPI number?
The NPI number for Dennis Sullivan is 1861421265. It was assigned to this individual provider in the NPPES registry on June 30, 2006.
Where is Dennis Sullivan located?
Dennis Sullivan practices at 703 Comanche Trl, West Monroe, LA 71291. The listed phone number is (318) 396-4828.
What is Dennis Sullivan's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Dennis Sullivan enrolled in Medicare?
Yes. Dennis Sullivan is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Dennis Sullivan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Dennis Sullivan reassigns Medicare benefits to 13 organizations: Monroe Emergency Physicians LLC (Monroe, LA), Union General Hospital (Farmerville, LA), Northern Louisiana Emergency Physicians, LLP (Ruston, LA), Richland Parish Hospital Service District No 1-B (Rayville, LA), Island Medical Winnsboro LLC (Winnsboro, LA) and 8 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 Dennis Sullivan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Dennis Sullivan accept?
Health plans from CHRISTUS Health Plan, HMO Louisiana and UnitedHealthcare list Dennis Sullivan 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 Dennis Sullivan affiliated with any hospitals?
According to CMS data, Dennis Sullivan is affiliated with Natchitoches Regional Medical Center, Richardson Medical Center, East Carroll Parish Hospital and Union General Hospital.
When was this NPI record last updated?
The NPPES record for Dennis Sullivan was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.
# Dennis Michael Sullivan, M.D. · NPI 1861421265
Emergency Medicine physician in West Monroe, Louisiana. Individual provider, active in the CMS NPPES registry since June 30, 2006.
## Identity
- **NPI:** 1861421265 (Entity type: Individual)
- **Enumerated:** June 30, 2006
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 017356 (Louisiana)
- **Sole proprietor:** No
## Practice location
- **Address:** 703 COMANCHE TRL, West Monroe, LA 71291-8117
- **Phone:** (318) 396-4828
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 13 organizations under Medicare reassignment (form CMS-855R): Monroe Emergency Physicians LLC (NPI 1386235331, Monroe, LA); Union General Hospital (NPI 1881678704, Farmerville, LA); Northern Louisiana Emergency Physicians, LLP (NPI 1588828172, Ruston, LA); Richland Parish Hospital Service District No 1-B (NPI 1497913016, Rayville, LA); Island Medical Winnsboro LLC (NPI 1538515135, Winnsboro, LA); and 8 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Louisiana State University School Of Medicine In New Orleans, class of 1983
## Record status
- **NPPES last updated:** July 8, 2007
- **Other identifiers:** Medicare UPIN B61732 (LA); Medicaid 1941549 (LA); Medicare ID-Type Unspecified E11536 (LA)
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Source: [NPI Profile](https://npiprofile.com/npi/1861421265) · Data from the CMS NPPES public registry.