Dr. Jason Aaron Hannegan, MD
- Medicare services, 2024
- 305
- Medicare patients, 2024
- 140
- Part D claims, 2024
- 478
- Hospital affiliations
- 1
- Industry payments
- $3,066
- Practice address
- 5000 Hennessy Blvd, Baton Rouge, LA 70808
- Practice phone
- Call (225) 765-6565
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Hannegan's professional email, personal email and mobile number
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Dr. Jason Aaron Hannegan is an internist in Baton Rouge, Louisiana
Dr. Hannegan practices at Our Lady of the Lake Regional Medical Center in Baton Rouge, Louisiana, part of Franciscan Missionaries of Our Lady.
Dr. Hannegan's NPI, 1104846104, was assigned on July 20, 2006. Dr. Hannegan graduated from Louisiana State University School of Medicine in New Orleans in 1999. Dr. Hannegan holds Louisiana license 025460.
- NPI
- 1104846104NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6406851161
- NPI enumeration date
- July 20, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (225) 765-6565
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 53
- Medical school graduation
- 1999
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Jason Aaron Hannegan practices at Our Lady of the Lake Regional Medical Center in Baton Rouge, Louisiana
Dr. Hannegan's primary practice is Our Lady of the Lake Regional Medical Center, at 5000 Hennessy Blvd, Baton Rouge, LA 70808 in E. Baton Rouge Parish. The practice phone is (225) 765-6565.
- Our Lady of the Lake Regional Medical Center5000 Hennessy Blvd, Baton Rouge, LA 70808 · E. Baton Rouge ParishPhone(225) 765-6565
Source: Dmand AI Affiliation Data
Dr. Jason Aaron Hannegan is affiliated with 1 site of care and 1 medical group
Dr. Hannegan's primary practice is Our Lady of the Lake Regional Medical Center in Baton Rouge, Louisiana, part of Franciscan Missionaries of Our Lady. The medical group on file is Our Lady of the Lake Physician Group.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Jason Aaron Hannegan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Hannegan practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Our Lady of the Lake Regional Medical Center | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Franciscan Missionaries of Our Lady and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Jason Aaron Hannegan is one of 1,571 internists in Louisiana
Internal medicine is Dr. Hannegan's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Hannegan is licensed in Louisiana.
Specialties and state licenses
- Internal medicine, LouisianaPrimary
Internists near Dr. Hannegan
Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Jason Aaron Hannegan billed Medicare for 305 services in 2024
CMS data shows 305 Medicare services from Dr. Hannegan across 4 procedure codes in 2024, for 140 Medicare patients. Medicare paid $24,208 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Hannegan's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 2522024: 30521%
Dr. Hannegan compared with the Louisiana median for internists, 2024
- Dr. Hannegan
- Louisiana median
- Medicare services
- 305vs 42128% below
- Medicare patients
- 140vs 16013% below
- Part D claims
- 198vs 40851% below
Medians across 1,561 internists in Louisiana with Dmand AI profiles that report each measure.
Dr. Hannegan's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Hannegan and other internists in Louisiana.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Jason Aaron Hannegan treated 140 Medicare patients in 2024, average age 73
CMS counts 140 Medicare patients who saw Dr. Hannegan in 2024. The largest group is 75 to 84, with 53 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 39% are also on Medicaid. Their average risk score is 2.56, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Hannegan's median patient age at 65, with 55% women.
Dr. Hannegan's Medicare patients by age, 2024
Dr. Hannegan's Medicare patients by sex, 2024
- Women6849%
- Men7251%
Chronic conditions among Dr. Hannegan's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis51%
- Chronic kidney disease49%
- Mood disorders46%
- Diabetes44%
- Ischemic heart disease44%
- Anxiety43%
Share of Medicare patients with each condition. A patient can have several.
Dr. Hannegan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 65
Patient panel by sex, all payers
- Women55%
- Men45%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Jason Aaron Hannegan wrote 478 Medicare Part D claims in 2024
In 2024, Dr. Hannegan wrote 478 Medicare Part D claims for 217 patients. 85% of them were for generic drugs. CMS names the drug for 198 of them, across 9 drugs with 11 or more claims each, at $28,704 in total drug cost. In 2023, CMS named 115 claims across 7 drugs.
Dr. Hannegan's Part D claims by kind of drug, 2024
- Generic405 claims85%
- Brand-name73 claims15%
Dr. Hannegan's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Hannegan's Part D claims, 2024
- Opioids3%16 of 478 claims
- Antibiotics19%92 of 478 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1152024: 19872%
Drugs named by CMS: 9 in 2024, 7 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Jason Aaron Hannegan takes part in Medicare
Dr. Hannegan accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Jason Aaron Hannegan received $3,066 in industry payments from 2016 to 2025
CMS Open Payments shows 153 general payments to Dr. Hannegan from 24 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Janssen Pharmaceuticals, Inc paid the most, $653.
General payments to Dr. Hannegan by program year, 2016 to 2025
Companies that paid Dr. Hannegan the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Jason Aaron Hannegan graduated from Louisiana State University School of Medicine in New Orleans
Dr. Hannegan graduated from Louisiana State University School of Medicine in New Orleans in 1999.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Jason Aaron Hannegan's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Jason Aaron Hannegan
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Jason Aaron Hannegan's NPI number?
Dr. Jason Aaron Hannegan's NPI number is 1104846104. It was assigned on July 20, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Jason Aaron Hannegan?
Dr. Jason Aaron Hannegan is an internist in Baton Rouge, Louisiana. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Jason Aaron Hannegan practice?
Dr. Hannegan practices at 5000 Hennessy Blvd, Baton Rouge, LA 70808. Dr. Hannegan's primary practice is Our Lady of the Lake Regional Medical Center in Baton Rouge, Louisiana, part of Franciscan Missionaries of Our Lady.
What is Dr. Jason Aaron Hannegan's office phone number?
The practice phone on file for Dr. Hannegan is (225) 765-6565.
What is Dr. Jason Aaron Hannegan's medical license number?
Dr. Hannegan holds Louisiana license 025460.
Which hospitals is Dr. Jason Aaron Hannegan affiliated with?
Dr. Hannegan practices at Our Lady of the Lake Regional Medical Center in Baton Rouge, Louisiana.
What medical group is Dr. Jason Aaron Hannegan part of?
Dr. Hannegan is linked to Our Lady of the Lake Physician Group.
Does Dr. Jason Aaron Hannegan accept Medicare?
Yes. CMS data shows Dr. Hannegan billed Medicare for 305 services in 2024, and Dr. Hannegan accepts Medicare assignment.
How many Medicare patients does Dr. Jason Aaron Hannegan see?
CMS counts 140 Medicare patients who saw Dr. Hannegan in 2024, with an average age of 73.
What services does Dr. Jason Aaron Hannegan bill to Medicare?
In 2024, Dr. Hannegan's most billed Medicare services were hospital inpatient care (99232), hospital inpatient care (99239) and hospital inpatient care (99223).
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Where did Dr. Jason Aaron Hannegan go to medical school?
Dr. Hannegan graduated from Louisiana State University School of Medicine in New Orleans in 1999.
What drugs does Dr. Jason Aaron Hannegan prescribe most?
In 2024 Medicare Part D data, Dr. Hannegan's most prescribed drugs by claims were Spironolactone, Cefdinir and Jardiance.
Has Dr. Jason Aaron Hannegan received payments from drug or device companies?
CMS Open Payments shows $3,066 in general payments to Dr. Hannegan from 24 companies from 2016 to 2025. The largest total came from Janssen Pharmaceuticals, Inc.
How long has Dr. Jason Aaron Hannegan been practicing?
Dr. Hannegan graduated from medical school in 1999, 27 years ago.
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