Magan Medical Clinic, Inc.
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Magan Medical Clinic, Dermatology
420 W Rowland St, 2nd Floor
Covina, CA 91723

(626) 331-6411 Phone – General line
(626) 251-1500 Phone – Appointments (Open Mon-Fri, 7:30 am-5:30 pm)
(626) 251-1552 Fax


Dermatology Staff
Our wonderful dermatology staff. Board certified dermatologist
 Charles Chiang, M.D., F.A.A.D. is in the center


We provide quality dermatology care with compassion. Our specialty is medical dermatology, including:

  • Acne (both teenage and adult onset; we are enrolled in iPledge if Accutane is needed)
  • Eczema / atopic dermatitis (in both children and adults)
  • Psoriasis
  • Skin cancer / skin exams
  • Moles
  • Warts / molluscum
  • Rosacea
  • Pigmentation disorders
  • Alopecia areata (autoimmune non-scarring hair loss)
  • Scarring hair loss (autoinflammatory scarring hair loss)
  • Phototherapy (we have a nbUVB booth and Dr. Chiang completed a phototherapy fellowship at UCSF)
  • Hives
  • Itching (pruritus)
  • Nail disorders

  • Note: Cosmetic treatments are not performed in Dermatology but instead by Magan’s Medical Aesthetics Laser Center.

If you have psoriasis or hair questions, Dr. Chiang possesses special expertise. He completed fellowships in both fields at University of California, San Francisco where he saw a wide spectrum of patients (including the most severe), performed clinical trials, and published research.

We take pleasure in serving our community including Covina, West Covina, San Dimas, Rancho Cucamonga, Baldwin Park, Azusa, Glendora, Upland, El Monte, Duarte, Monrovia, Arcadia, La Puente, and Diamond Bar.

Same day appointments often available. No referral is necessary if you have PPO insurance. We accept a wide range of insurance plans (unfortunately, we do not accept Medi-Cal as primary insurance, only as secondary insurance).

For appointments, please call (626) 331-6411. We look forward to serving you!


"What’s New in..."

A monthly column by Dr. Chiang


May 2018

What's New in Contact dermatitis

What's new in dermatitis

I’m seeing an increasing number of patients with rashes behind their ears. As a dermatologist, my first thought is either a contact dermatitis (irritation or allergy) due to shampoo or conditioner versus seborrheic dermatitis (“dandruff”). The rest of the physical exam can usually point toward one of these diagnoses.

For patients I diagnose with a contact dermatitis, the chemical is often the official 2017 “Allergen of the Year” (voted yearly by the American Contact Dermatitis Society) of alkyl glucosides (ie, anything on the ingredients label that has the word “glucoside”). It is in many shampoos, conditioners, and cleansers. While overall allergy rates are about 2%, this is of course much higher in patients who see the doctor and have a rash behind the ears. Unfortunately, there is currently no widely available test to confirm the allergy as the most common test performed by allergists called the T.R.U.E. test does not include this compound. The allergen can be specially ordered and tested for, but this is uncommonly done by private allergists. I do not do this test and usually simply recommend avoidance and re-evaluation as the practical test.

The most common rash occurs behind the ears where the shampoo or conditioner drips from the thicker scalp skin to the thinner behind the ear skin. Dermatologists can treat the rash but the main potential cure is stopping the irritating shampoos and conditioners. Unfortunately, this is hard to do. The gentlest over the counter shampoo I recommend has tar which some people do not like the smell of. Regarding conditioners, due to the way they work, I do not know one that is reliably gentle.

If you have sensitive skin or other skin issues, please make an appointment for dermatology consultation at (626) 251-1500 to discuss your options.

Charles Chiang, MD, FAAD
Board Certified Dermatologist


- Boyd, et al. Update on Alkyl Gluocsides. The Dermatologist 2017
- - Sasseville D. Alkyl Glucosides: 2017 “Allergen of the Year.” Dermatitis 2017

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