Magan Medical Clinic, Inc.


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 Ė 5:30 pm)
(626) 251-1552 Fax


Dermatology Staff
Dermatology staff including Charles Chiang M.D., F.A.A.D. (center) &
Louis Bauman M.D., F.A.C.P (2nd from left)


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
  • Hair disorders (esp. thinning, shedding, and alopecia areata)
  • Phototherapy (we have a nbUVB booth)
  • Hives
  • Itching (pruritus)
  • Nail disorders
  • Topical therapy for photoaging and sun damage

If you have hair thinning or psoriasis, 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 for PPO insurance plans. Please call (626) 331-6411. We look forward to serving you!


"Whatís New in..."

A monthly column by Dr. Chiang


October 2015

Whatís New in Nonmelanoma Skin Cancer

What's new in Nonmelanoma Skin Cancer

Patients frequently tell me they wish to use supplements in addition to medical treatment for their skin diseases. For patients at high risk for nonmelanoma skin cancer (one definition used by a recent study was having 2 or more nonmelanoma skin cancers in the past 5 years), nicotinamide 500 mg twice daily (synonym for niacinamide) has been shown to reduce their risk to develop another nonmelanoma skin cancer by ~25%. Two quick notes. This supplement is not to be confused with niacin (nicotinic acid), which has side effects many patients consider intolerable (flushing, headache, etc). Also, the investigator Dr. Damian does not recommend it currently for the general population, only for those who have a history of nonmelanoma skin cancer.

Two main things are holding me back from strongly recommending this to my patients. One, the research is currently only published in abstract (summarized) form and I am awaiting the full data to be published. Two, the effect was seen after subjects took the supplement twice daily for a year. Practically speaking, itís difficult for most people to be consistent about taking a twice daily medication for so long. Third, while not studied, it is likely that the benefit would be lost once subjects stopped taking the supplement. As difficult as it is to take a pill twice daily, taking a pills indefinitely would be even tougher.

If you have a lesion worrisome for skin cancer or have any other questions, please make an appointment for dermatology consultation at (626) 331-6411

Charles Chiang, MD, FAAD
Board Certified Dermatologist


- Martin AJ, et al. Oral nicotinamide to reduce actinic cancer: A phase 3 double-blind randomized controlled trial. J Clin Oncol 33, 2015 (suppl; abstr 9000)
- London S. Nicotinamide cuts nonmelanoma skin cancers. Dermatology News 2015
- Surjana D, et al. Nicotinamide enhances repair of ultraviolet radiation-induced DNA damage in human keratinocytes and ex vivo skin. Carcinogenesis 2013

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