Khosrow Momtaz Phototherapy Center

Khosrow Momtaz Phototherapy Center

The Khosrow Momtaz Phototherapy Center at Massachusetts General Hospital has been at the forefront of ultraviolet radiation therapy for chronic skin conditions for more than 30 years.


For centuries, doctors have prescribed sun exposure as a treatment for many skin disorders. At the Khosrow Momtaz Phototherapy Center, our ultraviolet light therapies offer a safer alternative to sun exposure and use a variety of fluorescent light bulbs that are far more effective.

Each year, our center delivers more than 13,000 treatments for chronic skin diseases such as psoriasis, eczema and lymphoma. Our staff is always available to answer patient questions and address their needs.

During the first visit, we discuss the history, occupation, exposures and any pertinent information that might affect the patient's ability to begin light therapy. In addition, we try to address any issues that might arise and determine whether phototherapy is the best treatment course. If it is, our nurse spends the patient's second visit going over all of our safety precautions.

In most cases, patients receive treatment three times a week for up to three to five months. Because flexible scheduling is the key to successful treatment for many, we offer both scheduled and walk-in appointments.

Safety Is a Priority

Patients begin their treatment by spending as little as 15 to 25 seconds in the light box, an upright booth lined with bulbs. Dosage is gradually increased, typically by about 20 percent per visit. Depending on the treatment, time in the box could end up being anywhere from four to 20 minutes.

Our treatments are tailored to each patient. A darker-skinned patient or a patient with a more extensive disease might need a higher dose than one who has had little sun exposure.

We urge patients to wear the same undergarments for each session to lessen the chance of strip burns and to cover any body parts that are not to be exposed.

Treatment, Not a Cure

Many of our patients have already tried topical treatments and other means of care. Although we can help any patient who is willing to put in the time, phototherapy is considered a management treatment, not a cure. We expect to eradicate at least 75 percent of a patient's skin disorder before tapering off the treatment.

Our goal at the center is to improve our patients' skin, thereby improving their lives. Many patients are referred to us after trying topical creams and treatments that have not worked. We offer a quick, whole-body alternative that is often very successful.

Contact Us

Khosrow Momtaz Phototherapy Center
Massachusetts General Hospital
50 Staniford Street, Suite 230
Boston, MA 02114

About this Program

Founded in 1974, our center was the first of its kind in the United States. We deliver more than 13,000 outpatient ultraviolet radiation treatments each year for more than 30 skin disorders, including:


  • Psoriasis
  • Pruritus (itching)
  • Atopic eczema
  • Prurigo nodularis (picker's bumps disease)
  • Lymphoma
  • Polymorphic light eruption ("sun poisoning")
  • Vitiligo (loss of skin color)

Under the direction of Charles Taylor, MD, a board-certified dermatologist with over two decades of phototherapy experience, our center provides ultraviolet light therapies as well as counseling and education about our treatments.

Offering More Options in Phototherapy Technology

Our center was the first ultraviolet light facility in the United States to introduce narrowband UVB phototherapy, which delivers the substantial benefits of the sun's rays contained safely in an artificial light box.

We were also the first to offer psoralen ultraviolet A (PUVA), a treatment using the UVA tanning rays of the sun. One hour prior to treatment, patients take a medication called psoralen in order to better absorb these rays.

Today, we are one of only a few centers in the Western Hemisphere to offer ultraviolet A1 (UVA1). UVA-1 phototherapy can be used in treating diseases of the skin in which hardening occurs such as morphea.

Our center delivers all types of phototherapy, including

  • Broadband and narrowband UVB phototherapy for total body

  • Combination narrowband UVB with PUVA photochemotherapy
  • Directed narrowband phototherapy for hands and feet

  • Directed local or total body UVA1 phototherapy
  • Broadband UVA phototherapy
  • Photodynamic therapy with blue light and ALA for actinic keratoses (pre-skin cancers)
  • Combination broadband or narrowband
        UVA and UVB phototherapy
  • Oral PUVA photochemotherapy for total body

Testing Services for Allergic Reactions

Our center also provides broadband UVA, UVB and visible light testing along with photopatch testing services. These services try to pinpoint whether the cause of a patient's skin reaction is to the sun itself or to the sunscreens being used in tyring to protect oneself from the sun.

Contact Us

Khosrow Momtaz Phototherapy Center
Massachusetts General Hospital
50 Staniford Street, Suite 230
Boston, MA 02114

Conditions & Diseases

  • Actinic Keratosis

    Actinic keratosis, also known as a solar keratosis, is a scaly or crusty bump that arises on the skin surface.

  • Atopic Dermatitis (Eczema)

    Atopic dermatitis, also called eczema, is a hereditary and chronic skin disorder that causes a person’s skin to itch, turn red and flake. It mostly affects infants or very young children.

  • Cutaneous T-Cell Lymphoma

    Cutaneous T-cell lymphoma is a disease caused when T-lymphocytes become malignant and affect the skin. T-lymphocytes are the infection-fighting white blood cells in the lymph system that kill harmful bacteria in the body, among other things.

  • Psoriasis

    Psoriasis is a chronic skin condition characterized by inflamed, red, raised areas that often develop as silvery scales on the scalp, elbows, knees, and lower back.

  • Psoriatic Arthritis

    Psoriatic arthritis is a form of arthritis associated with psoriasis. The disease is similar to rheumatoid arthritis in symptoms, characterized by joint inflammation.

  • Scleroderma

    Scleroderma, also called systemic sclerosis, is a chronic, degenerative disease that affects the joints, skin, and internal organs.

Clinical Trials



Contact Us

Khosrow Momtaz Phototherapy Center

Massachusetts General Hospital

Suite 23050 Staniford Street Boston, MA 02114
  • Near Public Transit
  • Handicapped Accessible
  • Phone: 617-643-2688
  • Fax: 617-726-9133

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