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) 251-1500. We look forward to serving you!


"What's New in..."

A monthly column by Dr. Chiang


June 2019

What's New in Psoriasis

What's new in Psoriasis

Psoriasis is a common disease seen in dermatology. Numerous studies have shown an association between psoriasis and obesity. However, it was unclear whether psoriasis caused obesity, obesity caused psoriasis, or both. Now a study has shown that obesity causes psoriasis and not vice versa. The study utilized a United Kingdom genetic database encompassing about 6700 psoriasis patients. They utilized mendelian randomization and found a statistically significant "about an 8% increase in odds of psoriasis per 1 unit higher BMI." There was "no strong evidence for a causal effect of the genetic risk of psoriasis on BMI" and "that the majority of the relationship is due to a causal effect of BMI on psoriasis, rather than the other way around."

BMI Classification
< 18.5 Underweight
18.5 to 24.9 Normal
25 to 29.9 Overweight
>= 30 Obease

BMI calculator:

Example: A 210 lb 5'9" patient has a BMI of 31 who is medically diagnosed as obese (Note: This is not stated as an insult against the patient. Obesity is a medical term that is defined as a BMI of at least 30.) By losing 7 lb (becoming 203 lb), the patient would have a BMI of 30 and an 8% decrease in odds of psoriasis.

This gives a strong incentive for patients with psoriasis to lose weight to potentially improve their diseases. This also encourages those with a family history of psoriasis to lose weight if overweight to potentially decrease their risk of developing psoriasis.

If you have psoriasis or another skin condition, consider making an appointment for dermatology consultation at (626) 251-1500 to discuss your options.

Charles Chiang, MD, FAAD
Board Certified Dermatologist

-Budu-Aggrey A, et al. Evidence of a causal relationship between body mass index and psoriasis: A mendelian randomization study. PLoS Med 2019

-Does Obesity Causally Influence Psoriasis Risk? The Dermatologist 2019

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