Jason A. Hannegan, MD

Medicare activity in 2024

Official CMS public-use data for Jason A. Hannegan, 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. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)141 services
2. Hospital discharge day management, more than 30 minutes (99239)87 services
3. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)56 services
4. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)21 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 cholesterol75%
• Arthritis51%
• Chronic kidney disease49%
• Diabetes44%
• Ischemic heart disease44%

Hospitals where Jason A. Hannegan works

Medicare's Facility Affiliation Data lists Jason A. Hannegan 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.

• Fmol Health | Our Lady of the LakeBaton Rouge, LA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 190064

Practice locations

Addresses where Jason A. Hannegan is enrolled with Medicare (CMS data updated October 2, 2026).

• 1125 W Hwy 30Gonzales, LA 70737 (225) 621‑2975
• 5000 Hennessy BlvdBaton Rouge, LA 70808
• 7777 Hennessy BlvdBaton Rouge, LA 70808

Group practices

Medicare enrollment lists Jason A. Hannegan as a member of this group (CMS data updated October 2, 2026).

• Our Lady of the Lake Physician Group LLC644 clinicians in the group

Specialties

• Internal Medicineprimary

Find other Internal Medicine doctors in Louisiana →

Other internal medicine doctors in Gonzales

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

• James R. Westerfield, MD
• Brian G. Gouri, MD
• Libertad Raibstein, NP
• Michael C. Adamek, MD
• Neil Patel, MD
• Christina A. Patterson, DO
• Richie Rose T. Diaz, MD
• Treyvon B. Holt, MD

All internal medicine doctors in Gonzales →

Other clinicians in Our Lady of the Lake Physician Group LLC

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

• Whitney M. Townsend, PA
• Kenndrica C. Bailey, NP
• Emily C. Kemp, PA
• Jared L. Braud, MD
• Gabrielle M. Brewer, DO
• Taralynn Johnson

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