Keeping Your Skin Healthy For over
30 years.

When it comes to treating your skin, it is important to
choose a specialist who knows skin inside and out.


The mission of Mary Louise Lenahan, MD is to provide outstanding medical and aesthetic dermatology to people of all ages.


We pride ourselves on innovative thinking, constantly striving for advanced education and utilization of the latest technology to achieve the best possible results.

With the expertise of Dr. Lenahan, a board certified dermatologist for over 25 years, we are able to provide the full spectrum of medical and cosmetic treatments with the most comprehensive care. Although we are committed to being on the cutting edge, we carefully evaluate every new technology and procedure for safety and efficacy before offering them to our patients.  We have developed a team of highly-trained, dedicated health care professionals that work together to provide consistent care throughout the office.



(716) 689-4378


(716) 689-4843


6507 Transit Road
East Amherst, NY 14051


Monday-Thursday 7:30a–5:30p
Friday 7:30a–4:00p


The Doctor's Desk

The world of skin care is ever expanding, tune in here for news about our office and skin care! 


Thank you For Attending

Thank you to all those who came to our free cancer screening this Saturday. We will keep you updated on more events coming soon. 

Who We Are

Mary Louise Lenahan, MD

Dr. Mary Louise Lenahan is a Buffalo native and third generation doctor. She graduated from medical school in 1979, and completed her residency in dermatology at SUNY Buffalo. In 1985, Dr. Lenahan opened her private practice in Buffalo and has been treating patients with care for the past 26 years. She is currently the Chief of Dermatology for the Catholic Health System, a fellow of the American Academy of Dermatology, and a member of the Buffalo-Rochester Dermatology Society. Dr. Lenahan has always prided herself in being an honest, hardworking dermatologist whose main concern is her patient’s wellbeing. As an experienced dermatological surgeon, she performs procedures daily on benign, pre-cancerous and cancerous lesions. Whether it is examining every mole on a patient, or meticulously performing cosmetic procedures, patients can be certain that Dr. Lenahan continually strives for perfection.

Katie Koch, RPA-C

Katie is a 2006 graduate of the University at Buffalo with a Bachelors degree in biochemical pharmacology and 2009 graduate of Daemen College with a Masters degree in physician assistant studies. She has been working alongside Dr. Lenahan since September 2010. 


Jennifer May, RPA-C

Jen graduated from UB with a degree in biology, followed by a masters in in Physician Assistant Studies at Daemen. She has been working alongside Dr. Lenahan since 2012.

Juliana Moshier, Physician Assistant

Juliana is a graduate of Daemen College with a BS/MS in Physician Assistant Studies. She has worked with Dr. Lenahan since 2014.

Jennifer Trillizio-Smith, Physician Assistant

Jennifer is a graduate of UB's Exercise Science bachelor's program, and holds a MS in Physician Assistant Studies from Daemen College. She has spent the past 3.5 years working as a Physician Assistant.

Medical ServiceS

It can be difficult to obtain and maintain healthy skin due to a variety of factors, including sun exposure and genetics. Utilizing highly detailed exams and one-on-one consultations, Dr. Lenahan takes a comprehensive and detail oriented approach to diagnose and properly treat medical issues relating to the skin. She and her staff can help keep your skin healthy and glowing for years to come.

Treatments Offered


New Patient Form  

HIPAA Consent Form

Office Financial Policy

Medical Record Release Form To Us

Medical Record Release Form From Us


At Lenahan Dermatology, we know our patients have many options when choosing a dermatologist. We would like to express our appreciation for having the chance to be yours! We truly enjoy having you as a part of our practice.

We hope your experience at Lenahan Dermatology has exceeded your expectations and would appreciate receiving your feedback about the care provided in our office. In an effort to improve our service, please take a few moments and complete this satisfaction survey. Your responses are very important to us. Thank you!


Cosmetic Services


Radiesse is a volumizing filler that immediately provides the volume and lift needed to diminish the signs of aging.  Radiesse acts as a scaffold under the skin to provide structure and stimulate your own natural collagen growth.


Sculptra is a filler that gradually replaces lost collagen and provides structure that allows your new look to emerge more discreetly. Sculptra gives you natural-looking results that last up to 2 years.


Restylane/Perlane work to instantly smooth away facial wrinkles. These products add volume and fullness to the skin to correct moderate to severe facial wrinkles and creases.


These products are used to temporarily alleviate the look of fine lines in the “11’s”, on the forehead and around the eyes.


Multiderm is a gentle form of dermabrasion that exfoliates the stratum corneum layer of the skin. This gives the skin a brighter glow and allows products to penetrate the skin more effectively. There is almost no downtime with this mild, but effective treatment.

Chemical Peels

Keep your skin looking clear and promote a healthy looking glow with our chemical peels. We offer a variety of peels that target a wide array of cosmetic concerns including fine lines and wrinkles, pigmentation, scarring, acne, rosacea and solar damage. Peels can be performed on the face, chest, back, hands and eyes. They are a relatively fast procedure with minimal downtime and side effects.

  • Glycolic 30/50/70%: Glycolic peels help to reduce fine lines and wrinkles, combat mild aging, resurface the skin, and reduce mild hyperpigmentation.


  • Salicylic 30%: Salicylic peels are perfect for acne patients. They help to reduce oily, blemish-prone skin through exfoliation and cleansing of the pores.


  • Pyruvic 50%: Pyruvic peels help to reduce symptoms of aging such as fine lines, age spots and moderate hyperpigmentation. Pyruvic peels also target acne blemishes, reduce pore size and smooth the skin.


  • Jesner 20% Lactic/15% Salicylic/14% Resorcinol: Jesner peels combat moderate hyperpigmentation and help to tone and lighten the skin. Additionally, the help to target signs of aging such as fine lines and creases.


  • Mandelic 40%: Mandelic peels target sensitive, redness-prone skin by improving skin tone and texture and reducing pore size.



For the best possible service, please schedule a cosmetic consultation. By combining in-office procedures and products for use at home, we can create a personalized plan to help you get the best results possible


The Avene line is specifically developed for sensitive skin. Made from thermal spring water in Avene, France, this product line suits all of your cosmetic needs in a gentle, yet effective manner.

These products help to treat extremely dry, sensitive skin, rosacea, acne prone skin, fine lines and wrinkles, pigmentation, and post procedure redness or irritated skin.

Jan Marini



Jan Marini Skin Care Research is a recognized leader and innovator in skin care that is committed to continually expanding and improving the professional skin care market. JMSR's two primary focuses are to provide innovative technologies that deliver proven measurable results and an unwavering commitment to the ongoing success of our customers. These products focus on acne, anti-aging, pigmentation and rosacea.


If you have any questions or would like to leave a comment please fill out the form. For help finding our office click on the map. We look forward to hearing from you!

Lenahan Dermatology

6507 Transit Road
East Amherst, NY 14051

Phone: 716.689.4378
Fax 716.689.4843

Name *