Northeast Florida
Internal Medicine
Personalized internal medicine in Jacksonville — specializing in Lyme disease, weight loss, hormone replacement, and ADHD. In office or by telemedicine.
★★★★★ 4.8 Google Rating | 30+ Years in Practice | Telemedicine in 6 States
Patient Portal
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About Northeast Florida Internal Medicine
Internal Medicine & Integrative Wellness Clinic in Jacksonville, FL
Northeast Florida Internal Medicine is a Jacksonville-based practice with a reputation for catering to the comprehensive, individual needs of every patient. In practice for 30 years, Dr. Blissenbach leads an experienced team — most of whom have been with the practice for more than a decade.
Every patient is seen as part of our family, with the time and dedication to be fully involved in decisions about their care. For convenience, we offer telemedicine visits across Florida, Georgia, Alabama, South Carolina, North Carolina, and Virginia.
In-Office Diagnostics & Services
- Echo, Carotid Doppler & Renal Ultrasound
- ANS, Metabolic Rate & Bone Density (DXA) testing
- IV Vitamin & Glutathione infusions
- Immunizations & in-office blood draws
- Telemedicine & in-office visits
Care That Centers on You
Five focused specialties, one dedicated team — in office at Herschel Street or by telemedicine.

Lyme Disease
Lyme-literate diagnosis & treatment for tick-borne illness, led by an ILADS-member physician.

Weight Loss Management
Medically supervised weight-loss management tailored to your metabolism and goals.

Hormone Replacement Therapy
HRT for women and men, including pellet therapy, guided by careful lab work.

ADHD
Thoughtful evaluation and ongoing management for adults with ADD/ADHD.

Internal Medicine
Comprehensive primary care, preventative health, and in-office diagnostics.
"At NEFIM we take on medical issues with complete dedication and commitment to meeting every patient’s expectations"
Our Team
Dr. Elyssa Blissenbach
Founder & Internal Medicine Physician
Dana Whray
Patient Care Coordinator
Lauren Wick
Office Administrator
Casandra Branch
Medical Billing Coordinator
Lea-Anne Griffis
APRN
Kristine Hendryx
MA
We Accept Most Insurance Providers
Questions about your coverage? Contact us for additional information.
Jacksonville
2065 Herschel Street, Jacksonville, FL 32204
Mon–Thu 8:00 AM – 4:00 PM
Friday 8:00 AM – 3:00 PM
Sat–Sun Closed