Doctors and Staff

Dr. Ulmer, Dr. Sleep, and Dr. Reinstadler manage a dermatology practice in Long Beach that embodies the experience of excellence in all aspects of skin treatment.

Our focus is to treat people with skin disease effectively and completely. We strive to ensure that patients feel cared for from the moment they call for an appointment with a dermatologist, until their skin problem is resolved. Ulmer Dermatology has established a tradition of providing the highest standard of care while incorporating the newest technology and latest dermatologic research for the past 40 years. Our entire staff is committed to providing professional, knowledgeable and comprehensive service to each person who comes into our office.

His philosophy is simple: treat people with skin disease effectively and completely. Dr. Ulmer has established a tradition of providing the highest standard care, while incorporating the newest technology and latest dermatologic research into his protocols. Long-standing loyalty to his patients and staff has created a warm and comfortable office environment.

A key member of the Ulmer team is Dr Susan Sleep. Dr. Sleep has provided cosmetic dermatology services as well as medical dermatology in the Long Beach area for years. Board certified in both Internal and Aesthetic Medicine, Dr. Sleep combines her experience and expertise in excellent patient care with the goal of providing individualized and uniquely qualified skin care management.

Dr. Ulmer and Dr. Sleep are joined by Dr. Amy Reinstadler. She has extensive hands-on-experience in general dermatological areas as well as being an expert in many cosmetic procedures. Dr. Reinstadler makes every effort to serve her patients with the most comprehensive care available, guiding patients into improving all aspects of their skin.

Whether you visit our office for the medical care of skin cancer, psoriasis, acne, or cosmetic dermatology, we will make every effort to serve you as we have in the last four decades – with the most comprehensive care available.

Dr. Douglas K. Ulmer

  • Medical and Surgical Dermatology
  • Dermatopathology
  • Cosmetic and Laser Surgery

Memberships and Affiliations

  • The American Academy of Dermatology
  • The American Academy of Dermatopathology
  • American Society for dermatological Surgery Fellow
  • American Academy of Cosmetic Surgery Fellow
  • American Society of Cosmetic Dermatology & Aesthetic Surgery Fellow
  • American Society of Liposuction Surgery Member

Dr. Ulmer was born on March 13, 1945, in Fort Myers, Florida, and spent most of his youth in Akron and Toledo, Ohio. Before his senior year of high school, Dr. Ulmer and his family moved to California, where he attended Pasadena Polytechnic School.

Dr. Ulmer attended DePauw University in Indiana, where he was a double major in chemistry and pre-med. He graduated in 1967 and was elected to the honor society Phi Beta Kappa. After completing his undergraduate studies, Dr. Ulmer moved west once again, to pursue his medical degree at UCLA School of Medicine. He graduated with honors in 1971, and was elected to the Alpha Omega Alpha Honor Medical Society.

Dr. Ulmer conducted his internship at Los Angeles County Harbor General Hospital from 1971-1972, and completed his three-year residency program in dermatology in the UCLA-Harbor Dermatology Department in 1975.

He was board-certified by The American Academy of Dermatology (AAD) in 1976. Following additional training and coursework in dermatopathology, Dr. Ulmer became certified by the American Board of Pathology in 1981.

Dr. Ulmer has been practicing dermatology in Long Beach since 1975. His vast knowledge, coupled with his no-nonsense approach and excellent service, has made him one of the leading dermatologists in Southern California. His philosophy is simple: Treat people with skin disease effectively and completely. Over the last three and a half decades, Dr. Ulmer has established a tradition of providing the highest standard of care.

The popularity of cosmetic and laser treatments has surged in recent years, and dermatology is constantly being modified to accommodate the newest research and technology. Dr. Ulmer keeps abreast of the latest changes in the field of dermatology by continuing his education and regularly attending conferences given by The American Academy of Dermatology and the American Academy of Cosmetic Surgery. He strives to add appropriate new procedures to his arsenal of treatments and therapies.

With the opening of the doctorULMER Cosmetic & Laser Surgery Center in 2005, Dr. Ulmer has been able to serve the latest demands of his field. However, even while utilizing the up-and-coming skin treatments, Dr. Ulmer still enjoys the challenge of seeing his traditional dermatology patients with their large spectrum of skin conditions.

Dr. Ulmer’s hobbies include golf, spear fishing, and boating. He resides in Long Beach with his wife, Jeanne.


Dr. Zena H. Gabriel

  • Medical and Surgical Dermatology
  • Cosmetic and Laser Surgery
  • Mohs Micrographic Surgery

Memberships and Affiliations

  • The American Academy of Dermatology
  • American Society for Mohs Surgery
  • American Society of dermatological Surgery

Dr. Gabriel is pleased to be practicing medicine in Long Beach, where she was born. A lifelong Californian, she graduated from Huntington Beach High School before moving north to attend the University of California, Berkeley. She graduated from Berkeley with high distinction and earned a Bachelor of Arts degree in Political Science and a minor in Education.

After her undergraduate work, Dr. Gabriel went on to assist with clinical research trials in the Department of Rheumatology at UCLA Medical Center. At UCLA, she gained knowledge and a sense of appreciation for the immune system and its effect on other organs systems, including the skin.

She went on to study medicine at the University of California, San Diego, where she was awarded several scholarships and senior medical student awards upon graduation. She was the recipient of the Fretom Research Award which is given to one outstanding student each year.

After medical school, Dr. Gabriel completed an internship in Internal Medicine at the University of California, San Diego Medical Center. She then moved to Los Angeles, where she joined the USC Department of Dermatology for 3 years and completed her dermatology residency. While in residency, she enjoyed teaching and mentoring medical students. She served as Chief Resident during her senior year and was also a medical student instructor for the Pathology of the Skin course at the USC School of Medicine. She is currently on the medical staff at Saint Mary Medical Center and lectures and teaches the training doctors in dermatology.
Dr. Gabriel has a minimalist approach to helping her patients achieve natural, beautiful skin. Her philosophy is to provide procedures and treatments that leave them with the most natural look possible so that even the most discerning eye cannot tell they have had something done.

Dr. Gabriel has been featured as the medical expert in two syndicated Neutrogena commercials as a dermatology expert.

Dr. Gabriel has been practicing at Ulmer Dermatology for over 5 years and has added a youthful, enthusiastic and professional presence to the office. She is extremely loyal to her patients and goes above and beyond in educating and guiding her patients in achieving radiant and healthy skin.

Find Zena H. Gabriel on Google +

Dr. Amy Reinstadler

A dermatologist and cosmetic surgeon offering a full spectrum of medical and cosmetic dermatologic care, Dr. Reinstadler is a lifelong Californian who graduated with an undergraduate degree in Microbiology, Immunology, and Molecular Genetics from the University of California, Los Angeles. While at UCLA, Dr. Reinstadler graduated with honors, including Magna cum laude and Pi Beta Kappa.

Upon graduation from UCLA, Dr. Reinstadler attended the Keck school of Medicine at the University of Southern California. During her time at USC, Dr. Reinstadler was elected as a member of the Alpha Omega Alpha Honor Medical Society. She also received numerous scholarships and awards, including the American Medical Association Education and Research Foundation Fund Clinical Award, which is given to the top graduating student each year.

Dr. Reinstadler completed her dermatology residency training at the University of California, Irvine. In the general dermatology area she has excellent hands-on-experience in several areas including dermatitis, acne, eczema, psoriasis, rosacea, skin cancer detection and removal, hair loss, and vitiligo. She is an expert in many cosmetic procedures, including injectable fillers and volumizers, Botox, lasers, chemical peels, and sclerotherapy.

Whether treating medical, surgical, or cosmetic dermatology patients, Dr. Reinstadler provides the highest standard of care, while incorporating the newest technology and latest dermatologic research into her treatment protocols. She makes every effort to serve her patients with the most comprehensive care available, guiding patients into improving all aspects of their skin.

Marie Gazeley

Marie is a lifelong resident of San Pedro. She graduated from San Pedro High School and attended Harbor Community College for two years, before joining Dr. Ulmer’s staff in 1983, more than 30 years ago!

Marie spent one year working in the front office, before moving to her longtime current position in the “back office”. She assists with general dermatologic procedures and cosmetic procedures such as dermabrasion, eyelid surgery, and scar repair.

Marie was so intrigued by the dermatological knowledge she acquired working with Dr. Ulmer, that she was inspired to continue her education. In 2005, she attended cosmetology school in Torrance, and, upon graduation, began offering her services to patients of the office.

Dr. Ulmer has found the skin care Marie provides to be extremely beneficial to our patients, especially those working around school and work schedules. With a focus on skin rejuvenation, Marie uses acne extractions, chemical peels, microdermabrasion and various masks in her arsenal of treatments, designed to treat those patients with everything from acne to hyperpigmentation.

Marie lives in San Pedro, and has two children.

Dawn Kruger

Dawn received her A.S. degree from Cypress College in 1980. She then went on to earn her RDA and CDA, and worked for six years in dentistry with Dr. William Ralston of Fullerton.

Dawn has worked at Ulmer Dermatology for over 25 years. She worked for 20 years as a medical and surgical assistant to Dr. Ulmer, before moving to the Laser Center, where she currently serves as co-director.

Dawn is the primary office contact for Mohs Micrographic Surgery, supporting patients throughout the entire process. She educates the patient about the procedure during the initial consultation, arranges the surgery date and pre-operative care, assists with the surgery, and maintains contact with each patient throughout his or her postoperative care. Dawn also serves as a Laser and Cosmetic consultant, where she informs patients about Photodynamic Therapy (PDT), Photofacials (IPL), Botox, Fillers, Fractionated CO2 Resurfacing, Dermabrasion, and eyelid surgery.

Dawn lives in Long Beach with her husband Jim, and is actively involved in the community.

Bridget Zinger, RN

Bridget received her R.N. from the Long Beach City College School of Nursing in 1985. Throughout her 28-year career as a nurse, she has worked at Long Beach Memorial in Labor & Delivery, where she continues to work today.

Bridget joined the Ulmer Dermatology staff in February 2006 and brought with her 21 years of nursing experience. She lives in Cypress with her husband Ted, and has three sons.

Bridget is an integral part of our team and administers the following treatments in our Laser Center:

  • Patient Consultations
  • Photodynamic Therapy (PDT™)
  • Intense Pulse Light (IPL™)
  • Laser Hair Removal
  • Superficial Facial Peels
  • Acne Surgery
  • Clear100XL™
  • BOTOX, Dysport
  • Sculptra
  • Juvederm, Restylane, Perlane
  • Fractionated CO2 Resurfacing
  • Sclerotherapy
  • Varilite

Sarah Baca

PA-C, MMS – Physician Assistant

Sarah is a Southern California native. She obtained her undergraduate degree from the University of California, Los Angeles, then went on to complete her physician assistant training at Stanford University School of Medicine while concurrently completing a Master of Medical Science degree from the University of Saint Francis. Sarah is a board certified Physician Assistant with over seven years of clinical experience. She has completed specialty training in medical, surgical and cosmetic dermatology with Dr. Amy Reinstadler and Dr. Douglas Ulmer. Sarah enjoys treating patients of all ages and is passionate about Dermatology. She is thrilled to be a provider at Ulmer Dermatology and looks forward to helping patients achieve healthy, beautiful skin.

Sarah is a member of the American Academy of Physician Assistants, the California Academy of Physician Assistants, and the Society of Dermatology Physician Assistants.

Sarah lives in Newport Beach with her husband and Labrador Retriever. She enjoys traveling, music and the beach lifestyle.

Dr. Susan Sleep

Board Certified Internal Medicine and Certified Aesthetic Medicine

    • Dermatology
    • Internal and Aesthetic Medicine

Memberships & Affiliations

  • American Academy of Aesthetic Medicine, Board Certified
  • American Board of Internal Medicine, Board Certified
  • Pacific Dermatology Association
  • Cancer Support Community Board Member
  • Cancer Support Community Physician Advisory Board Member
  • American Medical Women’s Association – Former President
  • American Board of Aesthetic Medicine
  • American College of Physicians

As an internist with a medical and cosmetic dermatology emphasis, Dr. Sleep has been serving the greater Long Beach area since 1991. Being born and raised in Long Beach, Dr. Sleep’s ties to the community run deep. Dr. Sleep graduated from Millikan High School in 1979 and her daughter Savanna Sleep from Wilson High School in 2011 and USC in 2015. Dr. Sleep went on to graduate Phi Beta Kappa with a BS in Psychobiology, an honors degree, from University of Southern California. She was then granted an early decision admission to the Keck School of Medicine at USC and graduated in 1988 with honors in medicine and dermatology. Dr Sleep followed with an internship and completed her residency training program at St Mary Medical Center/Harbor-UCLA.

Dr Susan Sleep has received advanced dermatology education, laser, radio-frequency and high intensity focused ultrasound training. She has provided cosmetic dermatology services as well as medical dermatology for many years, and recently increased her services and offerings to include non-melanoma skin cancer training in Superficial Radio-Therapy. As a Cancer Support Community Physician and Board Member, Dr. Sleep is uniquely qualified in this area of expertise.

Dr Sleep is pleased to be part of the Ulmer team. Dr. Sleep is Board Certified in Internal Medicine and Certified by the American Academy of Aesthetic Medicine. This allows Dr. Sleep the unique capability of being able to combine her experience and expertise in excellent patient care while providing individualized and uniquely qualified skin care treatment and management.