Phone: 207-942-0669
Fax: 207-947-3143


Dr. Orville Hartford, MD

Dr. Hartford is the owner and supervising physician of Penobscot Valley Dermatology. He is a board certified dermatologist.  He attended Dartmouth Medical School and completed his dermatology residency at the University of Vermont.

He joined Penobscot Valley Dermatology in 2009.  He is a native of Calais, Maine.

All nurse practitioners see patients under the direct supervision of the physicians at Penobscot Valley Dermatology We have a team approach to patient care as we all strive to provide expert dermatologic services for our patients.


Dr. Faith Whalen, MD

Faith WhalenA native of northeastern Pennsylvania, Dr. Whalen graduated summa cum laude from the University of Scranton with a BS in Biology. She obtained her M.D. from Temple University School of Medicine, followed by an internship at Crozer-Chester

Medical Center outside of Philadelphia.

She completed her Dermatology residency at Geisinger Medical Center in Danville, PA where she served as chief resident followed by a Mohs/Procedural Dermatology fellowship, also at Geisinger. Dr. Whalen is board certified by the American Board of Dermatology and a certified member of the American College of Mohs Surgery.

She has several publications in peer-reviewed journals, with a focus on skin cancer research. She currently resides in Dedham, ME with her husband.

Click here for More About Mohs Surgery - American College of Mohs Surgery


Amy Sim, FNP

Faith WhalenAmy Sim received her Bachelor’s of Science Degree in Nursing from Boston University in 1982.  She began her varied career in bedside nursing and transitioned to a number of clinical settings including medical surgical, neurology and cardiology. 

She relocated with her family to Maine in 1999 and fulfilled a desire for advanced practice education by enrolling at the University of Maine where she received her Master’s degree in Nursing in 2007.  Thereafter, she was engaged in clinical research projects for a specialty practice.  She sought an opportunity for increased hand-on patient care and joined Penobscot Valley Dermatology in 2011.


Samantha Mitchell , FNP

Samantha MitchellSamantha Mitchell is a native of Sherman Mills, Maine. She received her Bachelor's of Science in Nursing from Husson College in 2006 and began her career at Eastern Maine Medical Center. 

In May of 2012, Samantha completed her Master's degree in Nursing from the Family Nurse Practitioner program at Husson University. Samantha received her certification through the American Academy of Nurse Practitioners and joined Penobscot Valley Dermatology in June 2012.

She currently resides in Hermon, Maine with her husband and three children. 


Holly Haeberlein, FNP

Holly HaeberleinHolly Haeberlein is a native of Maine and grew up in Bangor. She received her Bachelor’s degree in Biology from the College of Charleston in South Carolina and engaged in several challenging research projects.  

Eager to return to her hometown and pursue a patient-care career, Holly enrolled in the University of Southern Maine's Family Nurse Practitioner program and graduated in 2013 with a Master's degree in Nursing. Holly received her certification through the American Academy of Nurse Practitioners and joined Penobscot Valley Dermatology in October of 2013.  

With a strong background in dermatology both as a patient and a clinician, Holly looks forward to establishing her practice as a member of the PVD team.


Dr. Jeffrey Pittis, MD

Dr. Jeffrey Pittis, MD, the founding physician of Penobscot Valley Dermatology retired in November 2012. His wife Mrs. Deborah Pittis, NP retired from the practice in the spring of 2012. We thank them for their many years of service and caring for patients and staff. Enjoy!