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 (Appointment Desk open M-F, 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


November 2017

What's New in Eczema (atopic dermatitis)

What's new in Eczema (atopic dermatitis)

There have been helpful pediatric (less than age 18) studies of patients with eczema (atopic dermatitis), ie sensitive skin. The parents of pediatric patients often ask what non-prescription products can improve their child’s itching. While I almost always review gentle skin care products, studies have shown that oral melatonin can be helpful with a “really safe” safety profile. This is because patients with itchy skin often have difficulty falling asleep. This may result in additional time scratching while in bed, less healing time while asleep, and potential increased itching during the daytime due to being less well rested.

A recent study showed that the worse the skin was doing, the worse the sleep disturbances. Studies have varied in showing whether patients with sensitive skin have decreased or increased melatonin. However, a study of 72 pediatric patients with atopic dermatitis by Chang et al showed that increased melatonin levels are correlated with improved sleep efficiency. Then a follow-up randomized clinical trial of 73 pediatric patients (age ranging from 1.8 to 17 yrs, median 7 yrs) also by Chang et al found that melatonin 3 mg/day improved their atopic dermatitis by about 20% (as defined by a scoring system called SCORAD) and the onset of sleep occurred about 20 minutes faster. No adverse events were reported.

Melatonin has traditionally been used to manage insomnia and jet lag. It seems to have “immunomodulatory, anti-inflammatory, and antioxidative effects, which might improve the skin inflammation.”

Safety-wise, melatonin is overall considered quite safe. A British Medical Journal publication stating “17 randomised [sic] controlled trials with 651 participants showed no evidence of adverse effects of melatonin with short term use (three months or less).” The study by Chang et al above used a 4 week timeframe which I consider reasonable given the evidence we have so far. There is no evidence I am aware of to guide how often this 4 week timeframe can be repeated and would be up to the treating physician’s experience and intuition. Studies of melatonin have included both pediatric and adult studies. However, the youngest patient treated in the study above was 1.8 years of age.

If you have eczema, itchy skin, or other skin issues, please make an appointment for dermatology consultation at (626) 331-6411 to discuss your options.

Charles Chiang, MD, FAAD
Board Certified Dermatologist


- Kronemyer B. Impact of childhood AD. Dermatology Times 2017
- Chang YS, et al. Melatonin Supplementation for Children With Atopic Dermatitis and Sleep Disturbance: A Randomized Clinical Trial. JAMA Pediatr 2016
- Chang YS, et al. Atopic dermatitis, melatonin, and sleep disturbance. Pediatrics 2014
- Marseglia L, et al. Melatonin and atopy: role in atopic dermatitis and asthma. Int J Mol Sci 2014
- Rossignol DA, et al. Melatonin in autism spectrum disorders: a systematic review and meta-analysis. Dev Med Child Neurol 2011
- Buscemi N, et al. Efficacy and safety of exogenous melatonin for secondary sleep disorders and sleep disorders accompanying sleep restriction: meta-analysis. BMJ 2006

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