Dennis M. Sullivan, MD

Medicare activity in 2024

Official CMS public-use data for Dennis M. Sullivan, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.

Most frequent services

1. Emergency department visit with high level of medical decision making (99285)160 services
2. Emergency department visit with moderate level of medical decision making (99284)131 services
3. Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)70 services
4. Critical care, first 30-74 minutes (99291)24 services
5. Emergency department visit with low level of medical decision making (99283)23 services

Chronic conditions among these patients

Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).

• High blood pressure75%
• High cholesterol71%
• Arthritis58%
• Diabetes45%
• Ischemic heart disease43%
• Heart failure38%

Hospitals where Dennis M. Sullivan works

Medicare's Facility Affiliation Data lists Dennis M. Sullivan at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.

• East Carroll Parish HospitalLake Providence, LA · Acute Care Hospital · Emergency services: listed by Medicare · CCN 190208
• Natchitoches Regional Medical CenterNatchitoches, LA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 190007
• Richardson Medical CenterRayville, LA · Acute Care Hospital · Emergency services: listed by Medicare · CCN 190151
• Union General HospitalFarmerville, LA · Critical Access Hospital · Emergency services: listed by Medicare · CCN 191301

Practice locations

Addresses where Dennis M. Sullivan is enrolled with Medicare (CMS data updated October 2, 2026).

• 254 Hwy 3048Rayville, LA 71269 (318) 728‑4181
• 336 N Hood StLake Providence, LA 71254 (318) 559‑4023

Group practices

Medicare enrollment lists Dennis M. Sullivan as a member of these groups (CMS data updated October 2, 2026).

• Richland Parish Hospital Service District No 1-B40 clinicians in the group
• East Carroll Parish Hospital38 clinicians in the group

Specialties

• Emergency Medicineprimary

Find other Emergency Medicine doctors in Louisiana →

Other emergency medicine doctors in Rayville

Clinicians with the same Medicare primary specialty in Rayville, LA — not a recommendation.

• John T. Santogrossi, MD
• Michael D. Proctor, MD
• Kevin M. Carlisle, MD

All emergency medicine doctors in Rayville →

Other clinicians in Richland Parish Hospital Service District No 1-B

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

• John T. Santogrossi, MD
• Emily M. Stansbury, NP
• Jennifer G. Bennett, NP
• Michael D. Proctor, MD
• Michael B. Sims, CNA
• Virginia Y. Gonzalez, MD

Clinician information

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
6. Medicare Care Compare — official Medicare tool to look up clinicians