Dr. Cano & Staff

Dr. Francisco J. Cano Asthma, Allergy, and Immunology Specialist

Dr. Francisco J. Cano

Dr. Cano is a Board Certified Allergy Immunology specialist and sees adult and pediatric patients. An allergist/immunologist is a physician specially trained to manage and treat diseases such as asthma, allergic rhinitis, food allergies, immune deficiencies, drug allergies, and urticaria. Allergist / Immunologists complete an additional two years of training or fellowship after a pediatric or internal medicine residency prior to becoming eligible to be Board Certified in allergy and immunology.

Barbara L. Varga RN, MSN, FNP-BC

Barbara L. Varga

Barbara has practiced professional nursing since 1991. Mrs. Varga has a variety of nursing experience including: adult and pediatric emergency room, step down telemetry and medical/surgical units. She graduated with her Bachelor of Science in Nursing from Youngstown State University and continued to receive her Master of Science in Nursing from Youngstown State University Spring of 2013 with a Family Practitioner degree. She is certified as an FNP and is granted the ability to practice as a FNP in the states of Ohio and Pennsylvania.

Donna M. Barretta CRNP

Donna M. Barretta

Donna graduated from Clarion University in 1997 with an ASN and in 2003 with a BSN. She received her Master of Science in Nursing from Clarion University in 2008. She is a certified family nurse practitioner. As a CRNP, she has worked in rural health clinics, hospice and palliative care. Mrs. Barretta has worked in family medicine for eight years and works with pediatric to geriatric patients. She has experience working with many chronic and acute health conditions. As an RN, she worked in home health, school and private practice. She works mainly in our Meadville and Greenville offices.

Missy RN


Missy graduated from Sharon Hospital School of Nursing and has been at our office since 1992. Having been with Dr. Cano for the longest duration, Missy specializes in all areas of our office, as she is very familiar with every aspect. Over the years, she has enjoyed watching our younger patients as they grow, and she has enjoyed witnessing our patients when their symptoms improve.

Angie RN


Angie graduated in 1981 from Sharon Hospital School of Nursing and has been at our office since 2002. Angie has a special interest in food allergies. She has a “wonderful way” of caring for our patients and enjoys working closely with patients, as well as their families.

Melissa MA


Melissa graduated from Sharon Business Institute of PA with an Associate’s Degree in Medical Assisting. She came to our office in 2001. Melissa specializes in the approval and administration of Xolair, which is a slightly different type of allergy/asthma treatment. She is a great addition to our team and enjoys seeing our patients progress.

Natalie ST


Natalie graduated from the School of Surgical Technology in Pittsburgh and joined our office staff in 2005, bringing with her 5 years of Dermatology experience. Her dermatology background is an asset to our office and she enjoys working with the doctor, caring for and educating our patients.

Donna RN


Donna graduated from Excelsior College in Albany, NY with an Associate’s Degree in Nursing and joined our office staff in 2007. Previously, she worked as an LPN for 18 years and her kind spirit has been a plus when caring for our patients. She enjoys working with patients of all ages.

Sue RN


Sue graduated from Meadville City Hospital School of Nursing. She worked over 40 years at Greenville Hospital/UPMC Horizon in various nursing specialties, retiring in 2015. She missed nursing and found joining our team was the perfect fit for enjoying a day with patients and colleagues. Her smile and caring personality make her a wonderful addition to our nursing team!

Robin Billing/Registration


Robin joined our staff in September of 2006. She specializes in scheduling, registration, and patient accounts. She brings with her many years of medical record experience. Robin is one of our main contacts with any billing questions or concerns.

Chris LPN


Chris also joined our team in January of 2013. She graduated from Choffin Practical Nursing Program in 1992. She works mainly in our Ohio offices at this time. Chris brings with her many years of allergy and asthma experience and also worked for Dr. Krishna- Rao before he relocated last year.

Kathy MA


Kathy came to work with us in January 2013 when her previous employer, Allergist, Dr Krishna-Rao relocated. You will find Kathy in the injection room on most days and many of our Warren patients have known her for 20+ years.

Diane MA, Billing/Registration


Diane is a graduate of J.H. Thompson Academy. In the past, she worked at Greenville Medical Center and as a freelance medical transcriptionist for 14 years before joining our staff in 2012. Diane brings with her a wealth of knowledge and experience in the medical field.

Donna M. Registration

Donna M.

Donna joined our staff in 2013, with the opening of our Warren office. She brings with her 23 years of office management experience. Before joining us, she worked for another allergist, Dr. Krishna-Rao at his Boardman office as his office manager. She also has many years of previous billing experience.

Jamie K. Billing Specialist/Registration

Jamie K.

Jamie attended Thiel College and has over 25 years Medical Billing experience. Previously she worked at Greenville Medical Center and she also worked for several local physicians prior to joining our staff. Jamie would be happy to assist you with any billing or insurance concerns.

Jessica Marketing & Registration


Jessica joined our staff in 2016, bringing with her 10 years medical office and marketing experience. She has worked for local doctors, as well as a top surgeon in North Carolina. She enjoys meeting all of our patients, and hopes to make every visit a fun and welcoming experience.

Beth Registration/Accounting


Beth graduated from Penn State Shenango with an Associate Degree in Business Administration. She joined our staff in 2016. She brings with her 19 years of accounting, payroll and business experience. She usually works behind the scenes, but occasionally you will catch her in registration and answering phone calls.

Check out our patient portal!

The Patient Portal Provides you with SECURE online access to portions of your medical records and EASY convenient online communication with our office! The Portal also allows you to:

  • Request refill prescriptions online
  • Send and receive secure non urgent messages with our staff
  • Print office documents, testing results and patient education
  • Print medication and allergy lists
  • Make changes/update your personal information
  • View previous and upcoming appointments
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Injection hours are subject to change.

MAIN OFFICE 59 West Main Street
Greenville, PA 16125

INJECTION HOURS: 12pm-5pm Thursday


136 Westchester Drive
Youngstown, OH 44515

INJECTION HOURS: 12pm-5pm Wednesday


735 Niles Cortland Rd SE
Warren, OH 44484

INJECTION HOURS: 10am-5pm Tuesday


105 Mead Avenue Suite C
Meadville, PA 16335

INJECTION HOURS: 12pm-5pm Tuesday

New Castle

26 Nesbitt Road
New Castle, PA 16105

INJECTION HOURS: 12pm-4pm Wednesdays


Linden Pointe Development
3100 Innovation Way
Hermitage, PA 16148

INJECTION HOURS: 10am-5pm Monday