Torrance Dermatologist
23550 Hawthorne Blvd., Suite 200
Torrance, California 90505 US
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17 years experience
13 expert answers
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Board Certifications

Board-certified by the American Osteopathic Board of Dermatology

Hospital Privileges

Dr. Horowitz has hospital affiliations at Torrance Memorial Medical Center, Providence Little Company of Mary Medical Center, Pacific Hospital of Long Beach.


  • Undergraduate & Medical School

    Undergraduate: California State University, Los Angeles
    Medical: Nova Southeastern College of Osteopathic Medicine
  • Post-Medical School Training

    Internship: Internal Medicine
    Residency: Michigan State University

Treatments offered at Coast Dermatology Medical Associates

Most popular answers from Mark Horowitz, DO

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Can B12 Shots Cause Cystic Acne?

This sounds like a coincidence. There is no scientific evidence or medical studies that have shown that B12 can cause cystic acne. READ MORE

Bump on my Upper Eyelid?

There are many different lumps and bumps that can grow on the upper eyelids. Many are benign (non-cancerous), but some are malignant (cancer). It is... READ MORE

How Can I Increase Melanin Production in my Skin Safely?

Sorry to say, but we now know there is so such thing as a healthy tan. Tanning your skin is your bodies way of trying to protect you from ultraviolet... READ MORE

What Techniques, Drugs, Foods, or Supplements Have Been Shown to Dissolve Limpomas?

The most commonly used method of treating lipomas is surgical excision. Many times it is easy to make a small incision to remove a large lipoma. This... READ MORE

My Dermatologist is Asking for $6000 for Milila Removal and Says It Takes 1 Year?

My recommendation is to get a second opinion from another dermatologist. Milia removal is often covered by your health insurance. When something just... READ MORE

Increasing Vitamin D by Supplement?

Vitamin D is a vitamin that is produced from sun light hitting our skin. It can also be found in some foods. Vitamin D is important for our bones.... READ MORE

I'm on Oral Isotretinoin 10mg/day.Can I Do Salicylic Acid Peel?still W/ Lots of Closed Comedones!

I usually recommend my patients stay away from things like peels while they are on Isotretinoin. Your skin becomes much more sensitive and the... READ MORE

How Many Tablets Should I Be Taking, Accutane?

The dose of Accutane is often determined based on weight of the patient and the response to treatment. However, when ever there seems to be confusion... READ MORE

What Could This Be? How Do I Get Rid of It?

There are too many possibilities to give you an answer. I would recommend that you be seen by a physician as soon as possible. Lesions on the penis... READ MORE

Can I Do Pulsed Dye Laser(PDL) Treatment for Keloids While on Accutane?

Accutane can make your skin very sensitive to a variety of treatments. I would not recommend having any laser treatment performed while on accutane.... READ MORE

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*Your results may vary. Any specific claims or permanence length of results vary for each patient and are not guaranteed.