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Our Team

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All of our providers are very experienced and offer at least 20 years of experience each! They specialize in internal medicine to provide the best care for prevention, evaluation and disease management services. They all work closely together as a team to bring the best comprehensive care.

“Our passion has always been to treat patients, We take our time to get to know each patient and treat them with compassion and respect”.

Bestcare Providers and Staff


Barbara Bialowolska-Romaniuk, MD


Dr. Barbara Bialowolska-Romaniuk has been a physician for the last 30 years. She was born in Poland, She finished Medical Academy in Warsaw in 1979. She specialized in internal medicine and has practiced in various settings from hospitals to solo practice. Dr.Romaniuk currently lives in the Phoenix area and is in private practice in Surprise. She believes in homeopathic remedies and the use of supplements to improve health. Areas of clinical interests are disease prevention, health maintenance, women’s health, geriatrics and nutrition. Dr. Romaniuk’s interests outside of work are spending time with her family which includes 2 children Marcus and Magdalena and 3 grandchildren Michal, Maciek and latest edition in 2010 little Melania. She also loves to go hiking, dancing and swimming.


Catherine Krings, FNP-C

Nurse Practitioner

Catherine Krings is Arizona Board licensed Family Nurse Practitioner (FNP-C). She is originally from the Philippines where, as a Kellogg Scholar she earned her undergraduate in Psychology and her subsequent medical degree at the University of the Philippines. She then completed her residency in Family Medicine. She has a  broad clinical background, specializes in internal medicine and has over 20 years of clinical experience. As a internal medicine nurse practitioner, Catherine Krings focuses on all areas of Internal Medicine as well as Medical Weight loss and Hormone Replacement Therapy. She has incorporated into her practice preventive and continuing health care, as well as Integrative Medicine. Catherine is coming froman Internal Medicine practice located in Sun City, where she worked as a Internal Medicine nurse practitioner for the last 7 years and is very familiar with our specialists, hospitals and services. Along side Dr. Barbara, they will work closely together as as team to bring you the best comprehensive care.


Izabela Musial, MD


Izabela Musial, MD.  has over 24 years of experience in the medical field. She graduated from Jagiellonian University, Collegium Medicum, Faculty of Medicine in 1998. She completed her residency at the Swedish Covenant Hospital in 2002. Since this time, she has practiced in the Phoenix area in various settings from hospitalist to solo practitioner. Her focus is internal medicine, women's health, hormones, and regenerative medicine. Dr. Musial is a highly respected physician, provides excellent care, and has excellent rapport with patients.


Lorraine Stevens, PA-C

Physician Assistant

Lorraine is a certified physician assistant with over 30 years of clinical experience. She came to Arizona in 2011 from New York where she attended Long Island University and graduated in 1987 as a physician assistant. She practiced in outpatient and inpatient settings in New York and Arizona primary focusing on family and internal medicine. Lorraine is dedicated, passionate and thorough.


Magdalena Fit

Practice Administrator

Magdalena has been managing Bestcare Internal Medicine since 2009. She is passionate about patient care and making sure the practice is operating smoothly. She ensures practice is operating efficiently through the planning, coordinating and implementing of goals, objectives, procedures and systems inclusive of front end duties such as scheduling and registration, clinical functions such as direct care. Magdalena also is in charge of back end processes such as medical record management, charge entry, billing and reconciliation processes. When is is not managing the practice, she spends time with her 3 wonderful children and loves working out.

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