Placeholder Photo for William J. Long, MD

As a cardiologist in Slidell, LA, Dr. William Long offers treatment plans for conditions affecting your heart & cardiovascular system, such as hypertension.

Reviews of Dr. Long
Dr. Long


See what patients are saying about Dr. Long.





  • Recommends
  • Available
  • On Time
  • Friendly
  • Professional
  • Knowledgeable
  • Nice Office
  • Understandable
  • Reachable

Dr Long spent a long time with me explaining my condition, options and outcomes. He was very personable and made me feel confident that I had chosen the right doctor for my surgery. The other patients in the waiting room were all discussing what a wonderful surgeon he is. The office is run in a professional, courteous manner.

Offices of Dr. Long See Insurance
of Dr. Long

Smh Professional Serv at Smh  

Accepting New Patients?

Yes, Dr. William J. Long is accepting new patients at this office.


(985) 643-0826


1001 Gause Boulevard, Slidell, LA 70458-2939

Office Details

Doctor Specialties Cardiology & Internal Medicine
Accepting New Patients? Yes
Practice Specialty Multi Specialty
Languages Spoken English

Cardiology Institute, Inc.  

Accepting New Patients?

Yes, Dr. William J. Long is accepting new patients at this office.


(985) 643-9808


1051 Gause Boulevard, Suite 320, Slidell, LA 70458-2988

Office Details

Doctor Specialties Cardiology & Internal Medicine
Accepting New Patients? Yes
Languages Spoken English

Insurance Accepted  

  • Medicare

About Dr. Long
Dr. Long


Dr. William Long graduated from Brown University Program In Medicine in 1982.

Dr. Long has two offices in Louisiana where he specializes in Cardiology and Internal Medicine.

Dr. Long works with eight doctors including Dr. Koteswara Pothineni and Dr. Marc Bernstein.


Education & Training  

Hospital Affiliations

  • Slidell Memorial Hospital
  • Forrest County General Hospital
  • Ochsner Clinic Foundation
  • Louisiana Medical Center & Heart Hospital
  • Ochsner Medical Center Northshore LLC

Languages Spoken  

  • English

Dr. Long's Medicare Fee‑for‑Service Data (2014)  

Please Note: The information displayed below is sourced from the 2014 Medicare Physician and Other Supplier National Provider Identifier (NPI) Aggregate Report. It's important to remember that the statistics below are not inclusive of all patients treated by Dr. Long, but only those who participate in Medicare.

  • Doctor participates in Medicare?: Yes 
  • Number of HCPCS Codes: 71 
  • Number of Services: 4098 
  • Medical Suppress Indicator:  
  • Number of HCPCS Associated With Medical Services: 65 
  • Number of Medical Services: 3803 
  • Number of Medicare Patients with Medical Services: 1073 
  Medicare Patient Demographics
  • Total Number of Medicare Patients: 1073 
  • Average Age of Medicare Patients: 73 
  • Number of Patients Under Age 65: 170 
  • Number of Patients Age 65 to 74: 406 
  • Number of Patients Age 75 to 84: 314 
  • Number of Patients Over Age 84: 183 
  • Number of Female Patients : 562 
  • Number of Male Patients: 511 
  • Number of Non-Hispanic White Patients: 908 
  • Number of Black or African American Patients: 125 
  • Number of Asian Pacific Islander Patients: 0 
  • Number of Hispanic Patients: 0 
  • Number of American Indian/Alaska Native Patients: 0 
  • Number of Patients with Race Not Elsewhere Classified: 0 
  • Number of Patients with Medicare Only Entitlement: 848 
  • Number of Patients with Medicare & Medicaid Entitlement: 225 
  Medicare Patient Condition Demographics
  • Percent of Patients with Atrial Fibrillation: 28% 
  • Percent of Patients with Alzheimer’s Disease or Dementia: 18% 
  • Percent of Patients with Asthma: 7% 
  • Percent of Patients with Cancer: 15% 
  • Percent of Patients with Heart Failure: 48% 
  • Percent of Patients with Chronic Kidney Disease: 43% 
  • Percent of Patients with Chronic Obstructive Pulmonary Disease: 33% 
  • Percent of Patients with Depression: 29% 
  • Percent of Patients with Diabetes: 46% 
  • Percent of Patients with Hyperlipidemia: 75% 
  • Percent of Patients with Hypertension (High Blood Pressure): 75% 
  • Percent of Patients with Ischemic Heart Disease: 73% 
  • Percent of Patients with Osteoporosis: 8% 
  • Percent of Patients with Rheumatoid Arthritis / Osteoarthritis: 44% 
  • Percent of Patients with Schizophrenia / Other Psychotic Disorders: 6% 
  • Percent of Patients with Stroke: 11% 
  Medicare Payments Data
  • Total Submitted Charge Amount: $785,483.00 
  • Total Medicare Allowed Amount: $278,835.58 
  • Total Medicare Payment Amount: $205,982.83 
  • Total Medicare Standardized Payment Amount: $221,880.68 
  • Total Medical Submitted Charge Amount: $753,703.00 
  • Total Medical Medicare Allowed Amount: $265,508.79 
  • Total Medical Medicare Payment Amount: $195,642.73 
  • Total Medical Medicare Standardized Payment Amount: $211,540.58 
  Medicare Prescription Drug Data
  • Drug Suppress Indicator: n/a 
  • Number of HCPCS Associated With Drug Services: 6 
  • Number of Drug Services: 295 
  • Number of Medicare Beneficiaries With Drug Services: 76 
  • Total Drug Submitted Charge Amount: $31,780.00 
  • Total Drug Medicare Allowed Amount: $13,326.79 
  • Total Drug Medicare Payment Amount: $10,340.10 
  • Total Drug Medicare Standardized Payment Amount: $10,340.10 

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