Welcome to Northeast Florida Internal Medicine
Providing the highest quality of care and acquiring the best technology as the practice of medicine has changed
Northeast Florida Internal Medicine is the premiere outpatient internal medicine practice in the region. Created by Dr. Elyssa Blissenbach over 15 years ago, NEFIM has consistently remained committed to the highest quality of care and acquiring the best technology as the practice of medicine has changed. NEFIM is the only practice in the region that has true one stop capabilities for all your medical needs, from routine preventive care to advanced management of complex disease.
Dr. Elyssa Blissenbach is passionate about her patients and providing cutting edge care. As the only board certified internist and obesity medicine physician in the region, Dr. Blissenbach takes care of her patients with total commitment to solving the most complex of medical problems. What distinguishes Dr. Blissenbach, however, is her genuine compassion and as our patients point out, the feeling of being a part of the NEFIM family. Dr. Blissenbach expertly treats each of her patients with the highest quality supported by the best technology, and always with utmost respect and compassion. While patients seek her out for her medical expertise, they remain in her practice for her kindness.
An expert in general internal medicine, Dr. Blissenbach is particularly interested in obesity medicine, Lyme disease, metabolic disease and osteoporosis. Sought as an expert in the most challenging and complex cases, come see Dr. Blissenbach and join the NEFIM family of patients.
Concerned you may have Lyme disease or want to get tested for Lyme disease? Lyme disease is transmitted via an infected tick’s bite and bacteria, causing extreme exhaustion, achy muscles, chills/fever, headaches, and sometimes a rash. If you believe you may have been infected or come into contact with any of these symptoms after spending time outdoors, it’s essential that you get tested as soon as possible. Lyme disease has some potentially harmful long-term effects if not treated right away. Come to our office in Jacksonville for discrete testing and treatment options customized specifically for YOU.
Our staff who will provide you with extraordinary care
Dr Elyssa Blissenbach, MD, PA
Dr. Elyssa Blissenbach is the sole Board Certified doctor specializing in Internal and Obesity Medicine in Jacksonville. She created the Northeast Florida Internal Medicine practice with a focus on giving the highest quality of care focusing on the areas of internal and obesity medicine. As the only board certified doctor in Internal and Obesity medicine in Jacksonville, she is the expert in the region. Sought as an expert in the most challenging and complex cases, she is truly the best in the business. Schedule an appointment with Dr. Blissenbach, and feel secure knowing your health is her top priority.
Lea-Anne Griffis, APRN
Lea-Anne joined the practice in 2021 and is an Advanced Practice Registered Nurse. Lea-Anne has been in the medical field for over 20 years and has held a wide array of positions throughout the Jacksonville area. She has experience in Preventative Medicine, Geriatric Medicine, Internal Medicine, and the OR.
Kristine Hendryx, Medical Assistant
Kristine has been a medical assistant for 13 years and has worked at NEFIM since April 2010. As a medical assistant, Kristine takes a caring and supportive approach when drawing labs and preparing patients for their visit. Kristine’s ability to relate to patient’s needs ensures that their visit is a positive experience.
Lauren Wick, Medical Assistant/BMO
Lauren has been a part of Northeast Florida Internal Medicine since September 2011. As a Medical Assistant and Licensed BMO she provides quality care for our patients by performing routine bone density exams and preparing patients for the providers. With her attention to detail and extensive knowledge in bone health and internal medicine she is able to assist the providers with the care of our patients.
Casandra Branch, Medical Billing Coordinator
Casandra has been in the medical billing field for 22 years. She is a billing expert, medical biller and revenue cycle specialist who thrives on analyzing and increasing revenue for the practice. She takes control of the practice revenue and generating income such a way that inspires, impresses, and at times, re-builds confidence in the physician’s decision to make the huge commitment to their medical field. Casandra is very diligent in auditing claims, submitting claims and performing follow-up functions till everything is paid in full. As a medical biller Casandra has one mission, get physicians the full reimbursement that is due.
Dana Whray, Patient Care Coordinator
Dana joined Northeast Florida Internal Medicine in January 2007. Her role in this office has changed many times but her commitment to patient care and satisfaction never has. As the patient care coordinator she handles delicate family issues and offers guidance and support to our elderly patients. The goal with her position is to make our patients feel like family while maintaining a professional atmosphere.
Kristen Sampson, Medical Billing Assistant
Kristen joined the practice May 2018 and is a billing specialist. Kristen has been in the medical field for 14 years and has also worked as a medical assistant. Kristen is knowledgeable in all aspects of a medical office.
Pam Popa, Front Desk
Pam has been the front office check-in specialist since May 2014. She looks forward to greeting our patients when they visit our office. The patients are the top priority and she strives to make them feel welcome, make them smile, and let them know the office staff truly cares.
The prevention and treatment of illnesses and patients is our primary goal here at Northeast Florida Internal Medicine. The nature of our treatment is a secondary goal that drives our success, as we focus on treating our patients in a uniquely personalized manner. In addition to coordinating care for our patients with other medical specialists, we treat common illnesses as well as chronic conditions.
* Diagnosing of COVID with rapid and PCR testing * Labs drawn to determine response to vaccines with antibody levels * COVID vaccines for initial and boosters * Treatment of COVID including use of Ivermectin, Hydroxychloroquine, steroids and referrals for Monoclonal antibody therapy
A pre-operative clearance is required to assess your health before many surgeries. This process usually includes an office visit designed to address any medical issues that may need to be managed prior to the surgery as well those that may exist during the recovery period following the surgery. It also gives you a chance to learn about life after the surgery.
Preventive Health Care
Preventive Health Care
Being one step ahead is vital to providing the highest quality care to our patients and their well-being. The best way to accomplish this is a proactive preventive health care program. By establishing patient’s medical history, our providers work to customize a personal preventive health care treatment plan developed just for you.
Annual physicals are one of the best prevention methods for serious disease or illness. Annual physicals provide us with the opportunity to identify or “catch” potential issues early on, rather than after they become apparent. This allows us to start treatment earlier in the process and may even result in preventing a particular condition altogether.
Full laboratory testing is at the disposal of our patients, with the ease and peace of mind knowing they are not required to travel to separate laboratory facilities. We draw and/or gather all of the samples/specimens needed while you’re present in conduct the appropriate tests so we can provide you with a detailed analysis to discuss with one of our providers.
Obesity is an issue that can cause life threatening illnesses. Numerous illnesses are caused by obesity, but can be treated with expert care. Our team of experts are highly experienced in the diagnosing and treatment of diabetes, HTN, heart disease, asthma, hypercholesterolemia, cancer and joint destruction. It is this training that allows our patients to get the safest and most effective treatment.
Lab drawing in office
Lab drawing in office
Lyme Disease testing and treatment
Lyme Disease testing and treatment
We do Echocardiography, Renal Ultrasound, Carotid Dopplers, Pulmonary Function Tests, and Autonomic testing