About
Dr. David Lange knew early in life that medicine was his calling. He attended the University of Minnesota for medical school, spending his third year in Bemidji through the University's Rural Physician Associate Program (RPAP). That groundbreaking rural training program shaped his decision to pursue family medicine in smaller communities. He completed his Family Medicine residency at the University of Wisconsin-Fox Valley Residency Program in 1995.
Dr. Lange spent his early career at Marshfield Clinic in Merrill, Wisconsin, practicing full-spectrum family medicine that included obstetrics. He transferred to the Weston Clinic in 2005 when St. Clare's Hospital opened, then contributed to clinic development in Wittenberg. He later served as Primary Care Medical Director with Ministry Health Care, overseeing all primary care providers across Central Wisconsin. After a final tenure at Aspirus Medford Clinic, he founded Genesis Primary Care to practice fully on his own terms. He carries 27 years of experience treating patients across nearly every medical specialty area. He holds a particular interest in sleep apnea diagnosis and management. He remains comfortable caring for pregnant women for non-obstetric needs.
Education & Training
Undergraduate
University of Minnesota
Medical School
University of Minnesota (with third year at Bemidji, MN via Rural Physician Associate Program)
Residency
Family Medicine, University of Wisconsin-Fox Valley Residency Program (completed 1995)
Conditions Treated
Who is Dr. Lange right for?
Dr. Lange serves patients of all ages, from newborns through older adults managing complex chronic conditions. He treats a broad range of concerns spanning primary care, orthopedics, GI, respiratory, neurology, psychiatry, and more. Patients dealing with sleep apnea, hypertension, anxiety, COPD, or arthritis find his depth of experience especially useful. He also cares for pregnant women who need non-obstetric primary care support. Those who want a physician they can reach directly, without insurance barriers, fit well at Genesis Primary Care.
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Frequently Asked Questions
Dr. Lange treats conditions across a wide range of specialties. His clinical scope includes hypertension, diabetes, COPD, asthma, depression, anxiety, ADHD, arthritis, thyroid disorders, kidney infections, and many more. He also manages neurological conditions such as headaches, neuropathy, and Parkinson's disease. His 27 years of experience allow him to handle complex and multi-system patients effectively.
Dr. Lange has a strong interest in sleep apnea. He tests and manages sleep apnea directly within the practice. He is also a prescriber of low dose naltrexone (LDN) for a variety of conditions. His interest in medical technology informs how he approaches diagnostics and patient care.
Dr. Lange practices family medicine and completed his residency at the University of Wisconsin-Fox Valley Residency Program in 1995. He brings 27 years of broad clinical experience in family medicine settings across Central Wisconsin.
Yes. Dr. Lange sees patients of all ages, including newborns. He performs well-child exams, addresses childhood illnesses, and answers developmental and behavioral questions. Families with members across multiple age groups can all receive care under one membership.
Dr. Lange no longer practices obstetrics. He does remain comfortable providing non-obstetric primary care for pregnant women. For obstetric needs, he refers patients to the appropriate specialists.
Dr. Lange performs a range of procedures at Genesis Primary Care. These include mole removal, skin tag removal, cryotherapy, ingrown toenail excision, laceration repair, and joint, bursa, tendon sheath, and trigger point injections. He also conducts sleep apnea testing and manages treatment in-office.
Dr. Lange has 27 years of clinical experience. He has practiced across multiple health systems in Central Wisconsin, including Marshfield Clinic, Ministry Health Care, and Aspirus. He served as Primary Care Medical Director overseeing all primary care providers across Central Wisconsin during his time with Ministry Health Care.
Yes. Dr. Lange manages depression, anxiety, and ADHD at Genesis Primary Care. He does not prescribe controlled substances for psychiatric conditions. Patients needing medications outside that scope receive referrals to appropriate specialists.
During medical school at the University of Minnesota, Dr. Lange spent his third year in Bemidji, Minnesota through the Rural Physician Associate Program (RPAP). He describes the program as groundbreaking. That training shaped his path toward family medicine in rural and community settings.
Doctor profile last updated April 11, 2026