Dr. Michael Heffernan, Dr. Joseph Diehl, Cheryl Ketelsen PA-C. and Lacey Kalinen, PA-C, are accepting new patients. Please call the office at (805) 541-2650 to schedule your new patient appointment today! All of our San Luis Dermatology providers are contracted with Medicare only. Although we’re out of network providers we do accept all patients and can bill most all PPO plans as a courtesy.
San Luis Dermatology, Inc.
State-of-the-art skin care services, serving the San Luis Obispo area since 1977.
Now Accepting New Patients. Our providers accept Medicare.

Welcome to San Luis Dermatology
San Luis Dermatology has been serving the San Luis Obispo area, led by Dr. Jeffrey Herten, since 1977. From a single doctor, nurse, and front office staff member, the clinic has grown to include four physicians, two Physician Assistants, and twenty-five support staff, with three office locations in San Luis Obispo County.
Services

General Treatment
San Luis Dermatology has the experience and capacity to treat a wide range of common skin conditions. We look forward to helping you!

Skin Cancer
Successful treatment of skin cancer requires early detection, comprehensive examination and professional guidance.
Our team

Michael P. Heffernan
M.D., FAAD

Charles B. Fishman
M.D.

Joseph Diehl
M.D., FACMS, FAAD

Cheryl Ketelsen
Diplomate Fellow, SDPA

Lacey Kalinen
P.A.
Patient Reviews
Company News

Welcoming New Provider to North County!
Dr. Heffernan interviewed by The Dermatology Times
Dr. Heffernan authors article in The Lancet
Get In Touch
15 Santa Rosa St.
San Luis Obispo, CA. 93401
805.541.2650
1551 Bishop St. Ste. 410
San Luis Obispo, CA. 93401
805.541.4180
Send Us A Message:
Please keep in mind that communications via email over the internet are not secure. Although it is unlikely, there is a possibility that information you include in an email can be intercepted and read by other parties besides the person to whom it is addressed.
Please do not include personal identifying information such as your birth date, or personal medical information in any emails you send to us. No one can diagnose your condition from email or other written communications, and communication via our website cannot replace the relationship you have with a physician or another healthcare practitioner.
We don’t accept photos via this portal or email. All conditions must be looked at in person.
Please call the office directly for all scheduling inquires and/or urgent medical questions.
Thank you.