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.

Dr. Hartford joined PVD in 2009, and is a native of Calais, Maine.


Dr. Carolyn Ellis, DO

Dr. Ellis is a Board Certified Dermatologist and fellow of the American Academy of Dermatology. She earned her BA from Colby College in Waterville and her DO at the University of New England in Biddeford.

She completed her dermatology residency at Michigan State University - St. Joseph Mercy Hospital in Ann Arbor, where she served as Chief Dermatology Resident.

Dr. Ellis is a native of Connecticut, but has many family ties in Midcoast and Central Maine. She and her husband are happy to be back in Maine with their daughter and golden retriever.


Alana Silverman

Alana grew up in Oakland, Maine. She went to school at the University of Maine in Orono and graduated in 2015 with a major in biology and minors in Chemistry and Equiine Studies. She attended the physician assistant program at Drexel University in Philadelphia and received a Masters in Health Science in 2017.

Alana previously worked in Neurosurgery for 4 years prior to coming to dermatology and enjoys horseback riding where she competes in hunter-jumper. She has 3 dogs and is married, no children, and is 1 of 5 siblings.


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. She is currently fulfilling her service requirement to become certified in dermatology.

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.


Douglas Rhoda, PA-C

Douglas Rhoda is a native of East Millinocket, Maine. He received a BS in Chemistry from Gordon College in Wenham. MA and went on to receive a Masters of Health Professions and Physician Assistant Certificate from Northeastern University in Boston, MA. He has had a long-standing interest in dermatology  and chose the specialty for his elective rotation..

After completing his training, Doug moved back to Maine and worked in the Emergency Department at the hospital where he was born. He maintains an interest in medical missions and has participated in two trips to Guatemala with a team that provides medical care to residents of remote mountain villages.

After being a patient of PVD for several years, he was excited to join the team in March of 2020 as a Provider.


Denae Hudson, PA-C

Denae Hudson, PA-C graduated with a Bachelors Degree in Zoology from the University of Maine in 2017. She pursued a Master’s in Physician Assistant Studies at Faulkner University, which she completed in 2023. During her PA training, Denae explored her passion for Dermatology, completing an elective rotation at PVD in December 2023.

After accompanying her Air National Guard husband on a four-year active duty tour in Alabama, Denae has recently returned to her hometown in Maine. She is thrilled to be back home serving her community, hopefully for many years to come.

Outside of her professional pursuits, Denae treasures moments spent with her husband, daughter, and their three dogs, creating lasting memories together.


Cally Mountain, RN

Catherina (Cally) Mountain was born and raised in Maine, growing up in Dexter. She has an older sister and as well as a twin and enjoys spending time with her family. She is newly engaged—congrats, Cally!

Cally received her Bachelor of Science in Nursing from Husson University in 2014. During her ten years as a Registered Nurse, she provided care to patients in hospital, outpatient, corrections, and homecare settings. She developed a special interest in wound care and has spent the past eight years caring for patients with difficult wound issues.

With a strong desire to further her education, Cally pursued Nurse Practitioner studies and graduated from Husson University with her Master of Science in Nursing in 2023. She joined the PVD team in February, 2024. She is very excited to continue her career in the field of Dermatology.




What does DCNP mean?

All PVDs NPs are either Dermatology Certified Nurse Practitioners (DCNP) or working towards advanced certification in dermatology. Becoming a Dermatology Certified Nurse Practitioner (DCNP) requires a Masters degree in nursing, a current NP licensure, a national certification as a NP, a Minimum 3,000 hours of dermatology practice, and passing the dermatology nurse practitioner certification exam. Working towards and obtaining this special dermatology certification demonstrates a commitment to ongoing learning to help provide the best care possible to our patients. In addition to this certification all providers at PVD regularly attend educational conferences to remain up to date with the latest advances in the diagnosis and treatment of dermatologic conditions.


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.