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Meet Our Staff

Jason Biederman, D.O., F.A.C.O.I., F.A.S.N.

Jason Biederman, D.O., F.A.C.O.I., F.A.S.N.

Dr. Jason Biederman was raised in Farmington Hills, MI. He earned his Doctorate in Osteopathic Medicine from Michigan State University after having completed his science bachelorate at the Massachusetts Institute of Technology. Dr. Biederman completed his Internal Medicine Residency at Botsford General Hospital where he was chosen as Intern of the Year. He continued his Nephrology & Hypertension subspecialty training at Henry Ford Hospital. Dr. Biederman has authored numerous research publications pertaining to the effects of diabetes on the kidney. He has been recognized as a fellow of the American Society of Nephrology and the American College of Osteopathic Medicine. Dr. Biederman is the Medical Director of Fresenius Medical Services’ Livonia and Garden City hemodialysis units. Dr. Biederman continues with his passion of delivering the most advanced medical treatments available with Hypertension Nephrology Associates.
“I am committed to providing my patients with timely, quality nephrology care.”

Kal Ismail, M.D.

Kal Ismail, M.D.

Dr. Kal Ismail was born in Lansing, Michigan and is a Graduate of Wayne State University School of Medicine where he earned his medical degree with High Honors. He completed his residency in Internal Medicine at Henry Ford Hospital where he was awarded both Intern of the Year and Junior Resident of the Year and was subsequently chosen as a Chief Resident. Dr. Ismail continued at Henry Ford Hospital for his Nephrology subspecialty training where he also became Chief Nephrology Fellow. During his training Dr. Ismail was appointed to the Residency Review Committee for Internal Medicine; a committee of 20 members which is responsible for regulating the education of medical doctors nationwide. Dr. Ismail remains dedicated to compassionate, first-rate patient care and medical education through Hypertension Nephrology Associates. He currently serves as the Vice Chief of Staff at Henry Ford Hospital Macomb, and is the Medical Director of Fresenius Medical Services’ Warren and Madison Heights hemodialysis units.
“I have the most rewarding job in the world. Being a Nephrologist allows me to develop close relationships with my patients as I assist them in understanding their condition and treatment options.”

Michael Keefe, D.O., F.A.C.O.I.

Michael Keefe, D.O., F.A.C.O.I.

Dr. Michael Keefe, a native Detroiter, graduated from the University of Detroit High School and the University of Detroit before obtaining his professional degree with highest honors from the Chicago College of Osteopathic Medicine. His postgraduate training in Internal medicine was interrupted by three and a half years in the United States Army Medical Corps where he achieved the rank of Major. After completing his Internal Medicine training at Detroit Osteopathic Hospital, he continued his Nephrology sub-specialty training there and subsequently at the Cleveland Clinic. He is currently Medical Director at several dialysis units, Director of Nephrology Education at Botsford Hospital, and a Clinical Professor of Medicine at Michigan State University College of Osteopathic Medicine. Dr. Keefe, one of the original Hypertension Nephrology Associates, believes in patient oriented personal medical care and education to ensure that they are co-directors in the medical decision making process. 
“I feel fortunate in having a position that I love that is exciting, rewarding, and allows me to help people in need.”

Stacy Z. Ker, D.O.

Stacy Z. Ker, D.O.

Dr. Stacy Zwick Ker was born in Orrville, Ohio and is a graduate of Ohio University College of Osteopathic Medicine (OUCOM). Dr. Ker is a member of the National Osteopathic Honor Society which is an honor given to those showing a high degree of scholarship and service to their college and/or profession. Dr. Ker completed both her internship and residency in Internal Medicine at Botsford Hospital, located in Farmington Hills, Michigan. She then continued at Botsford Hospital to complete her Nephrology subspecialty program and was named Chief Nephrology Fellow in her final year of training. Currently, Dr. Ker is a member of the National Kidney Foundation (NKF), American Society of Nephrology (ASN) and the American Osteopathic Association (AOA). Dr. Ker is very passionate about management of Chronic Kidney Disease and Hypertension. She is the first physician in Hypertension Nephrology Associates to be certified as a “Specialist in Clinical Hypertension” by the American Society of Hypertension.
“I believe in educating patients about hypertension and working as their partner to achieve better health outcomes. There is more to hypertension than just treating it with a medication, and helping patients understand this, in an effort to improve their health, is important to me”.

Mark Marrone, M.D.

Mark Marrone, M.D.

Dr. Mark Marrone was born in New York, New York and grew up in Northern New Jersey. He completed his undergraduate degree at Boston College, and earned his Medical Degree at American University of the Caribbean. Subsequently he performed his Internship at University of Wisconsin in Milwaukee and completed his medical residency at St John’s Hospital in Detroit. He proceeded in obtaining and completing a Fellowship in the field of Nephrology at Wayne State University. In his final year of Fellowship training he was named Chief Nephrology Fellow. Dr Marrone is very active in the teaching program at Botsford General Hospital where he has proudly been the recipient of four Teacher of the Year awards. He was a member of the Scientific Advisory Board of the National Kidney Foundation from 2000-2003. Currently he is a member of the National Kidney Foundation (NKF), American College of Physician (ACP) and American Medical Association (AMA). He is the Chief of Nephrology at Botsford Hospital and Medical Director of Fresenius Medical Services Botsford Dialysis Center in Farmington Hills, Michigan. Dr. Marrone’s greatest joy is sharing the knowledge and experience that he has developed over the years with the medical students, interns, residents and fellows.
“I believe you need to give back what was given to you during your training.”

Crystal Martin, M.D.

Crystal Martin, M.D.

Dr. Crystal R. Martin was born and raised in Detroit, Michigan. She graduated from University of Illinois at Chicago Medical School and completed her Internal Medicine residency at University of Illinois Hospital. She returned to Michigan in 1998 to complete her Nephrology subspecialty training at the University of Michigan. Dr. Martin joined Hypertension Nephrology Associates in 2000 and has been a dedicated to improving medical care in the Detroit metropolitan area. She served as member and chairperson of the St. John Detroit Riverview Hospital Internal Medicine/Family Practice Quality Assurance Committee, chairperson of Medical Care Evaluation Committee, and member of Medical Executive Board. She is presently the Medical Director of Fresenius Medical Services University, Bewick, and Conner hemodialysis units. She has remained active in the teaching services at several hospitals and participates in community education through various community health fairs and service projects. Her special interests include Hypertension, Chronic Kidney Disease, and Lupus.
“I believe the doctor-patient relationship is a partnership. I believe in fully educating my patients on their disease and we work together to prevent or slow disease progression. Early preparation for future options, including kidney transplantation, is essential.”

Kelly Mercier, DO

Kelly Mercier, DO

Kelly Mercier, DO received both her undergraduate and medical degrees from Michigan State University. Throughout these years, she maintained her commitment to assisting the community and fellow classmates, often involved in educational services. She completed medical school as a member of Sigma Sigma Phi Honor Society. Dr. Mercier completed her Internal Medicine residency training at Botsford Hospital, located in Farmington Hills, Michigan. Her subspecialty training in Nephrology was performed at Botsford Hospital as well. During her final year of training, she was named the Chief Nephrology Fellow for her program. Currently, Dr. Mercier is a member of the American Society of Nephrology (ASN), the American College of Osteopathic Internists (ACOI), and the American Osteopathic Association (AOA). Her dedication to health maintenance and to her patients has continued to grow throughout her training. “One of the most important things that we as physicians can do is listen to our patients. We need to work together in order to determine the best and most effective method to achieve both our goals of improved health and well-being.”

Michael S. Misuraca D.O.

Michael S. Misuraca D.O.

Dr. Michael Misuraca was born in Fort Lauderdale, Florida and is a graduate of Nova Southeastern University, School of Medicine. Dr. Misuraca is a member of the National Osteopathic Honor Society, having graduated in the top 25 of his class. Dr. Misuraca completed his internship and residency in Internal Medicine at Botsford Hospital in Farmington Hills, Michigan. Dr. Misuraca used the knowledge base and experience from that training to go forward and complete a fellowship in Nephrology at Botsford Hospital. As the first Nephrology fellow in Botsford Hospital’s long prestigious history, Dr. Misuraca has forged a path for future Nephrology fellows to follow. Presently with Hypertension Nephrology Associates, Dr. Misuraca practices the art of Nephrology with the utmost passion and dedication.
“I not only enjoy taking care of patients medically, but I also enjoy providing education as it pertains to patients personally”.

Alison Allor, PA-C

Alison Allor, PA-C

Alison is a board certified Physician Assistant who joined HNA from DMC Harper University Hospital. She is a native Michigander, born in Port Austin, MI (at the tip of the thumb)! She graduated valedictorian from high school and in the top 10% of her class at the University of Detroit Mercy in Detroit, where she obtained both her Bachelor and Master of Science degrees. Alison has completed formal training at Beaumont, St. John, DMC, and Garden City hosptials. Since graduation, she has worked as a PA in Southeast Michigan. “I’ve wanted to work in medicine since I was a little kid, but I didn’t like blood. So funny that I work in a field that is all about cleansing the blood! The delicate balance between the kidneys and our other organs interests me. Plus, I like developing relationships with my patients that will provide insight into their healthcare that a list of labs and vitals cannot.”

Sharon Lewandoski M.S.N., F.N.P., P.C.

Sharon Lewandoski M.S.N., F.N.P., P.C.

Sharon Lewandoski, RN, MSN, FNP-BC is certified by ANCC as a Family Nurse Practitioner. She earned her Bachelors of Science in Nursing from Oakland University in 1994, and her Masters of Science in Nursing and Family Nurse Practitioner from Oakland University in 2004, graduating with honors. Sharon has had the privilege of working in nephrology since 1994, and joined Hypertension Nephrology Associates in 2004 as a Nurse Practitioner. She earned a Nephrology Nurse Certification (CNN) in 1996, and is a current member of American Nephrology Nurses Association.

Karen Loftus M.S.N., A.N.P., B.C.

Karen Loftus M.S.N., A.N.P., B.C.

Karen Loftus, RN, MSN, ANP, BC is certified by the American Nurses Credentialing Center as an adult nurse practitioner. She earned an Associate Degree in Nursing from Henry Ford Community College in 1982 and a Bachelor of Science in Nursing from the University of Phoenix in 2000. In 2008 Karen earned her Masters of Science in Nursing from Madonna University with High Honors. Karen joined Hypertension Nephrology Associates in June of 2008 to pursue her career as a nurse practitioner in nephrology. She is a member of the Michigan Council of Nurse Practitioners, and the American Nephrology Nurses Association.