Specialty: Family Practice

Prairie Ridge Health Clinic - Columbus
1515 Park Avenue
Columbus, WI 53925
920-623-1200

Bridget Sharkey graduated with her Bachelor of Science in Nursing at the University of Wisconsin-Oshkosh. She later received her Masters of Science in Nursing-Family Nurse Practitioner at Bradley University in Peoria, Illinois. She has been part of our Prairie Ridge team for many years and completed a variety of her clinical rotations with our primary care and specialty providers. Bridget is certified in Family Practice with the American Nurses Credentialing Center. In her free time, she enjoys traveling, spending time with friends and family, and outdoor adventures with her husband and labrador.

  • Specialty Family Medicine
Specialty: Family Medicine, Obstetrics - COMING MARCH 2021
Prairie Ridge Health Clinic - Columbus
1515 Park Avenue
Columbus, WI 53925
920-623-1200

Dr. Bryan received her Bachelor of Science from the University of Illinois College of Liberal Arts and Sciences and her MD from the Rush University College of Medicine. She completed her residency at the University of Michigan Hospital and is certified by the American Board of Family Medicine. 





  • Specialty Family Medicine, Obstetrics

Specialty: Obstetrics and Gynecological Services (OB/GYN) 
Prairie Ridge Health Clinic – Beaver Dam and Columbus

1511 Park Avenue
Columbus, WI 53925
920-623-1200

118 W Maple Avenue 
Beaver Dam, WI 53916
920-356-1000

Dr. Katheryn Kaldor wants her patients to feel that the patient, her patient’s family and she are a team. Whether you are navigating a new pregnancy or preparing to have surgery, Dr. Kaldor wants you to feel confident that she is with you every step of the way. Her philosophy with patients is the same as her philosophy in life: always do the right thing. Dr. Kaldor received her Bachelor of Arts from the Kansas State University in  Manhattan, KS and her DO from the Kansas City University of Medicine And Biosciences, MO. She completed her residency at the Philadelphia College of Osteopathic Medicine, PA. She is a Fellow of the American Congress of Obstetrics & Gynecology (FACOOG) and is certified by the American Osteopathic Board of Obstetrics and Gynecology.

  • Specialty Gynecology, Obstetrics

Specialty: Orthopedics
Prairie Ridge Health Clinic – Beaver Dam and Columbus

1515 Park Avenue
Columbus, WI 53925           
920-623-1200

118 W Maple Avenue 
Beaver Dam, WI 53916
920-356-1000

As a physician assistant, Mandy provides care to orthopedic patients in both clinic locations. She graduated from the University of Dayton, Ohio, Physician Assistant Program and also earned her B.A. from Edgewood College in Madison WI. Mandy is a valued member of the orthopedic team, specializing in preoperative and postoperative care as well as osteoarthritis. She enjoys working with patients one-on-one to provide a more individualized care experience.

  • Specialty Orthopedics

Specialty: General Surgery
Prairie Ridge Health Clinic – Beaver Dam and Columbus

1515 Park Avenue
Columbus, WI 53925           
920-623-1200

118 W Maple Avenue
Beaver Dam, WI 53916
920-356-1000

Dr. Robb Whinney specializes in general surgery and is fellowship trained in surgical critical care and trauma surgery. He received his Bachelor of Science from Wilkes University in Wilkes-Barre PA and his DO from Philadelphia College of Osteopathic Medicine in Philadelphia, PA. He completed his residency in general surgery at Wyckoff Heights Medical Center in Brooklyn, NY where he served as Chief Resident. Dr. Whinney completed his fellowship training at Jackson Memorial Medical Center/ Ryder Trauma Center Miami, FL. He was an Associate Professor at Yale University and Washington University in St. Louis, covering the sections of Burn, Trauma, and Critical Care. Dr. Whinney is a board certified general surgeon by the Fellow American College of Osteopathic Surgeons and the American College of Surgeons. Dr. Whinney sees patients at the Columbus clinic location.

  • Specialty General Surgery

Specialty: Orthopedics
Prairie Ridge Health Clinic – Beaver Dam and Columbus

1515 Park Avenue
Columbus, WI 53925           
920-623-1200

118 W Maple Avenue 
Beaver Dam, WI 53916
920-356-1000

As a physician assistant, Andrew Tratar provides care to orthopedic patients in both clinic locations. He graduated from the UW-Madison Physician Assistant Program and also earned his B.A. in Biology from Ripon College.

  • Specialty Orthopedics

Fellowship Trained Hip and Knee Replacement Specialist
Specialty: Hip, Knee and Shoulder Replacement, Orthopedic Surgery
Prairie Ridge Health Clinic – Beaver Dam and Columbus

1515 Park Avenue
Columbus, WI 53925           
920-623-1200

118 W Maple Avenue 
Beaver Dam, WI 53916
920-356-1000

Dr. Niesen is one of only a handful of surgeons in the state who holds the distinction of being fellowship-trained in orthopedic joint replacement surgery; specializing in hip, knee and shoulder replacement. He received his Bachelor of Science from the University of Wisconsin-Madison and his MD from the University of Wisconsin School of Medicine. He completed his residency at the University of California, Los Angeles, where he served as Chief Resident and was honored with the Longmire Surgical Society Research Award. He completed an additional fellowship in joint replacement at the Mayo Clinic and is certified by the American Board of Orthopedic Surgery. Dr. Niesen sees patients at both clinic locations.

  • Specialty Orthopedics

Specialty: Family Medicine, Obstetrics
Prairie Ridge Health Clinic - Columbus
1515 Park Avenue
Columbus, WI 53925
920-623-1200

Dr. Minier received her medical degree from Loma Linda University School of Medicine Loma Linda, CA. She completed her residency at Kern Medical Center Bakersfield, CA and is certified by the American Board of Family Medicine. Her special interests are obstetrics, including waterbirths, and pediatrics, but she sees patients of all ages, birth to over 100 years old.  She is also certified in performing DOT physicals, placing Nexplanons and IUDs. 



  • Specialty Family Medicine, Obstetrics

Specialty: Internal Medicine 
Prairie Ridge Health Clinic - Columbus
1515 Park Avenue
Columbus, WI 53925
920-623-1200

 

Dr. Asghar Marwat graduated from Shifa College of Medicine in Pakistan. He completed his Internal Medicine residency at Conemaugh Memorial Medical Center in Johnstown, Pennsylvania. Asghar's scope of practice includes inpatient and outpatient general Internal Medicine. He enjoys taking care of and developing relationships with his patients, being part of the community, and successful partnerships.

Outside of work, Dr. Marwat enjoys traveling, new experiences and trying out different cuisines. He also likes the outdoors, reading, and exercising. In the summer, he loves to BBQ. 

  • Specialty Internal Medicine

Specialty: Rheumatology, Osteoporosis, and Musculoskeletal Ultrasound 
Prairie Ridge Health Clinic – Columbus
1515 Park Avenue
Columbus, WI 53925
920-623-1200


Please verify your insurance when you schedule your appointment.


Dr. Dan Malone specializes in all aspects of Rheumatology, which is the diagnosis and treatment of arthritis and related autoimmune conditions.  He has special expertise in diagnostic musculoskeletal ultrasound and ultrasound-guided procedures, and he is recognized as one of the leading Rheumatology ultrasonographer practitioners and teachers in the nation.  He earned his MD from the University of Illinois Abraham Lincoln School of Medicine in Chicago and did a fellowship in basic scientific immunology research at the National Institutes of Health in Bethesda, MD.  He was on the faculty of the University of Wisconsin, Madison, for 23 years and then chose to join the private sector.  He is the current president of the Wisconsin Rheumatology Association, the state-wide scientific Rheumatology Organization.

  • Specialty Rheumatology
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