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Medical Staff

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Dr. Brandon Chase Osbon

Appleton Area Health is delighted to welcome Dr. Brandon Chase Osbon to the team! Dr. Osbon believes patients deserve the care they need when they need it, and wants to make it a priority to see sick patients when they need to be seen. He says Appleton Area Health already has a great team in place, and he hopes to be another physician that the patients of Appleton can trust.

Originally from Louisiana, Dr. Osbon now resides with his family in Montevideo. In 2022, Dr. Osbon started a physician group, Emergency Prime, to help with emergency room coverage of local rural hospitals.

In his freetime, Dr. Osbon enjoys golfing, cooking, and spending time with his family traveling and watching sports. Dr. Osbon looks forward to serving the Appleton community.

Dr. Osbon will begin seeing patients in January, 2024. He will provide care for patients of all ages!


Specialty:
Family Practice

Emergency Medicine


Education/Residency:

University of Mississippi

Ventura County Medical Center


 

Dr. Utpal Chakravorty

Welcome back Dr. Utpal Chakravorty! Dr. Chakravorty was previously with AAH and we are delighted that he has returned as he brings 50 years of knowledge and experience to the AAH team.

 

Dr. Chakravorty graduated from the Gauhati University in India in 1972. Following his graduation, his family moved to England where he practiced internal medicine and geriatric medicine for over 12 years. Following this he practiced in Saudi Arabia and England before moving to the United States. Dr. Chakravorty has experience in family medicine, internal medicine, gerontology, urgent care and more.

Dr. Chakravorty will be seeing patients for:

  • Preventative care and wellness exams for men and women

  • Well-child exams and immunizations

  • Acute/Urgent illnesses

  • Chronic care management of illnesses such as diabetes, high blood pressure, asthma, heart disease, and more!

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Dr. William Lee, FACS 

Dr. William Lee received his Bachelor’s degree at the University of South Dakota and attended medical school at the University of Iowa College of Medicine in Iowa City, Iowa. He also completed his surgical residency at the Kalamazoo Center for Medical Studies/Michigan State University in Kalamazoo, Michigan. He is certified by the American Board of Surgery.

Dr. Lee has worked as a general surgeon for over 25 years and has specialized in bariatric surgery for more than 15 years. He has practiced in Minnesota and South Dakota his entire career.

As a member of the American Board of Surgery, Dr. Lee performs a variety of surgical procedures and has had extensive experience in gastrointestinal and bariatrics and can perform a broad array of general surgical procedures.

Dr. Charles Keller 

Dr. Keller is a highly accomplished physician-leader who has a distinguished career specializing in family medicine, urgent care, and hospice care.

 

Dr. Keller comes to Appleton Area Health following several years in Iowa’s MercyOne medical system where he held several leadership roles. Dr. Keller is a graduate of the University of Iowa, and George Washington University School of Medicine. Dr. Keller is certified by the American Board of Family Medicine and is a fellow of the American Academy of Family Practice.

 

“I am delighted to have the opportunity to join the remarkable team at Appleton Area Health. My family and I are also excited to become a part of a wonderful community such as Appleton. Providing outstanding care to patients in their own backyard is vitally important to the overall health of rural Minnesota.” - Dr. Charles Keller

 

Away from his time at the hospital, Dr. Keller enjoys family time with his wife Stephanie and their three daughters.

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Elizabeth Charles APRN-CNP, FNP, CNM 

Philosophy of Care:
“I'm here to serve the people of the community by providing holistic care combined with continued education so they are able to live their best life. What I enjoy most about working in a rural clinic is getting to know my patients, their stories, and the opportunity to care for the whole family.”

Specialty:
Family Practice
Women’s Health
Midwifery
DOT Physicals

Education:
Indiana University of Pennsylvania
University of Cincinnati

Board Certifications & Memberships:
American Association of Nurse Practitioners
American College of Nurse-Midwifery
American Midwifery Certification

Tonya Diggins APRN-CNP, FNP, CNM

Philosophy of care:

"Every birth is an opportunity to make a connection.  Pregnancy can be a raw and vulnerable time and I believe in finding the best possible fit so that you feel confident and comfortable in your healthcare decisions.  My practice allows me the opportunity to build relationships based on communication, respect, and trust from birth throughout the entire lifespan!"

Specialty

Family Practice

Women’s Health

Midwifery

 

Education:
University of Minnesota

 

Board Certifications & Memberships:

American Nurses Credentialing Center

American Midwifery Certification

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Crystal Turner APRN-CNP, FNP

Philosophy of Care:

I believe in customizing care to respect my patient's individual 

beliefs, recognizing the importance of both physical and mental well-being. I believe in educating patients on maintaining their health and disease prevention to promote quality living.

My goal is that patients become a partner in their own care and be able to gain control and understanding of their own health and well-being.

 

Specialty:

Family Practice

 

Education

Chamberlain University

Frontier Nursing University

 

Board Certification

American Academy of Nurse Practitioners

Deb Colón APRN-CNP, FNP, PMHNP

 

Philosophy of Care: 

"I believe in treating the whole person by taking into account mental, physical, and social factors.  I am committed to working together to provide the best possible care for our patients.  Each patient is different, and I am passionate about treatment plans based on each person's needs, values, and beliefs because my primary role is to help you live your best life!"

 

Specialty:

Behavioral Health Medication Management and Therapy


Education:
North Dakota State University
University of Cincinnati


Board Certifications & Memberships:
American Nurses Credentialing Center
American Psychiatric Nurses Association
American Association of Nurse Practitioners

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Lesa Thielke APRN-CNP, FNP

 

Lesa received her Associate degree in nursing from MN West in 2017, her Bachelor of Science in Nursing degree in 2019, and completed her Master of Science in Nursing from Clarkson College in August 2022.

Lesa has worked at Appleton Area Health since 2019, and looks forward to continuing to serve the community she grew up in.  She has a variety of nursing knowledge ranging from surgery, dialysis, long-term care, wound care and ER.  She chose to further her nursing education as a family nurse practitioner to help others achieve and maintain their health by building a trusting relationship from the beginning to end of life. She has a passion for diabetes education and looks forward to offering these services to the community.  

 

Lesa grew up in Appleton. She resides in Holloway with her husband Rod and 3 sons Daniel, Landan, and Tyson.  In her free time, she enjoys camping, boating, fishing, and spending time with family and friends.

Lesa will begin seeing patients in early 2023.

Kelsey Tollefson MSW, LICSW

Philosophy of Care:

"I believe that mental and emotional health is just as important as physical health.  I'm dedicated to normalizing mental health treatment and reducing the stigma associated with mental health disorders!  I strive to provide treatment in a safe and comfortable setting to create a personalized treatment plan that addresses your concerns.  I understand the importance of integrated care where all providers work as a team to deliver exceptional care for every patient!" 


Specialty:

Cognitive Behavioral Therapy
Behavioral Health Therapy
Dialectical Behavior Therapy

Accelerated Resolution Therapy


Education:
South Dakota State University
Minnesota State University


Board Certifications & Memberships:
National Association of Social Workers

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Lisa deCathelineau MA, LMFT

Philosophy of Care:

"My career has been dedicated to assisting individuals and families through their personal and family unit struggles.  My passion is to create a safe environment for self-discovery and healing; walking alongside my clients to find the space they need to move forward through their unique challenges.  I find great value in using a holistic approach to treating mental, emotional and physical health by accessing and integrating services wherever possible." 


Specialty:

Cognitive Behavioral Therapy
Behavioral Health Therapy
Dialectical Behavior Therapy


Education:
University of Minnesota, Morris
Alfred Adler Graduate School


Board Certifications & Memberships:
Minnesota Board of Marriage and Family Therapy

American Association for Marriage and Family Therapy

Minnesota Association for Play Therapy

Brittany Hamann, PsyD, LPCC

 

Philosophy of Care:

“We are not meant to experience the world alone, yet we often expect ourselves to “work through” stressors like a solo mission. Therapy is a safe, confidential, and supportive way to learn and experience awareness of who you are as a beautiful and intelligent person.  Therapy teaches us about ourselves and alternative ways to think, feel, and be that make sense to each of us as individuals. This has the capacity to promote lifelong change. I find it a deep and true honor to join people on their missions for change.”

Specialty:

Cognitive Behavioral Therapy

Health Psychology 

Dialectical Behavior Therapy

Clinical Supervision

Health Psychology

Coping with Chronic Pain

Postpartum Changes / Women’s Health

Borderline Personality Disorder Assessment and Treatment

Specialty Therapy for individuals in: Law Enforcement, EMT, Labor Unions

Treatment for individuals participating in the MN Health Professionals Services Program (HPSP)

Cognitive-Behavior Therapy for Insomnia (CBT-I)

Therapy for the Therapist

 

Education:

University of Minnesota, Morris

The Minnesota School of Professional Psychology at Argosy University    

Saint Mary’s University of Minnesota Schools of Graduate and Professional Programs    

 

Board Certifications & Memberships:

Minnesota Board of Behavioral Health and Therapy 
Psi Chi—International Honor Society in Psychology  

Backing the Blue Line Therapist Member

Minnesota Firefighter Initiative (MnFIRE) Clinician

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