Joseph W Diehl, MD

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1551 Bishop St Ste 410 Bldg D
San Luis Obispo, CA 93401

San Luis Dermatology, Inc. is a state-of-the-art skin care clinic that has been serving the San Luis Obispo area since 1977. With a team of experienced physicians, including Dr. Jeffrey Herten, Dr. Michael Heffernan, Dr. Joseph Diehl, and Cheryl Ketelsen PA-C, they offer a wide range of general treatments and laser procedures to address various skin conditions. From acne to skin cancer, their comprehensive services ensure early detection, thorough examination, and professional guidance for successful treatment.

With three office locations in San Luis Obispo County, San Luis Dermatology has grown from a small practice to a team of four physicians, one Physician Assistant, and twenty-five support staff. They are dedicated to providing high-quality care and accept new patients, offering Medicare acceptance and billing most PPO plans as a courtesy. Committed to staying at the forefront of dermatology, they also engage in clinical research and participate in medical conferences to bring the latest advancements in skin care to their patients.

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Reviews

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4.57 reviews
Piper B.
7/25/2025

Thank you San Luis Dermatology providers. Dr. Deihl on Bishop and Sarah on Santa Rosa. I feel better for the first time since May. You wouldn't think that a skin problem could change your life,...

Marilyn M.
1/23/2025

I have been a patient of Joe Diehl Dermatologist for about 4 years now. His interest in my care is questionable. I am changing doctors because his primary medical interests lie in surgery. He...

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Tina Jo O.
7/15/2023

Super communicative. Spot on meds prescribed, got results. The method on line "doc in a box" was super easy and convenient. They have a very effective diagnostic method, and efficient mailing.

Maureen S.
12/13/2022

I am impressed with Dr. Diehl and his entire staff, for taking the time & effort to direct my care in finding a diagnosis and facilitating a course of treatment and referrals to form a team of...

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Nancy D.
10/3/2018

My husband and I have been seeing Dr. Diehl for over a year now and are very pleased with his work. We were patients of Dr Fishman for almost 25 years and were really sorry to hear he was cutting...

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United StatesCaliforniaSan Luis ObispoJoseph W Diehl, MD