KT
Accepting patients
Affiliated with a Castle Connolly Top Hospital
Who is Dr. Thomas, Dermatologist in Elmhurst, IL?
Board-certified by the American Board of Dermatology, Dr. Kathryn Marie Thomas MD is a trusted Dermatologist in Elmhurst, IL. Specializing in light therapy for patients with skin conditions, she offers focused clinical care to her community. With affiliations to top-ranked hospitals such as Endeavor Health Elmhurst Hospital and Northwestern Medicine Delnor Hospital, she brings comprehensive expertise to her practice. Specializing in the treatment of various skin conditions, including skin damage from sun exposure, moles, acne, and psoriasis, Dr. Thomas utilizes light therapy to address these concerns. Her clinical expertise centers on managing skin conditions, ensuring patients receive effective treatment. By combining her knowledge of dermatology with a patient-centered approach, she helps individuals achieve healthier skin. Dr. Thomas's training includes a residency at McGaw Med Center Northwestern University and an internship at University Hosps, both completed in 1993. She also has a background in internal medicine from Univ Hosp Of Cleveland. As a dermatologist who speaks Spanish, she is well-equipped to serve a diverse patient population. Her practice accepts major insurance carriers, including Blue Cross Blue Shield of Michigan, Cigna Group, and Medicare. New patients can schedule a visit with Dr. Thomas at her Elmhurst office or at one of her other locations in Lombard. She is accepting new patients and is committed to providing accessible care to her community.
Where did Dr. Thomas go to medical school and complete their residency?
Residency: Univ Hosp Of Cleveland, Internal Medicine | McGaw Med Center Northwestern University
Is Dr. Thomas board certified as a Dermatologist?
Yes, Dr. Kathryn Thomas, MD is board certified by the American Board of Dermatology
What languages does Dr. Thomas speak?
Dr. Thomas and their clinical team can communicate with patients in the following languages:
English
Spanish
What conditions does a Dermatologist like Dr. Thomas typically treat?
As a Dermatologist, Dr. Thomas diagnoses, treats, and manages a wide range of conditions. This condition information is derived from anonymized insurance claims and highlights the medical conditions most commonly treated by Dr. Thomas. It provides insight into the doctor’s areas of experience and expertise based on real-world patient encounters from the past two years, updated quarterly. Learn more about our claims-based healthcare methodology.
Also known as:
- Skin Tumor of Uncertain Behavior
- Skin Condition
- Skin Neoplasm
- Skin Growth
- Uncertain Skin Lesion
ICD-10 Codes:
- D485: Neoplasm of uncertain behavior of skin
Also known as:
- Actinic Keratosis
- Skin Condition
- Sun Exposure
- Skin Cancer Treatment (PDQ®)
- Solar keratosis
- Precancerous skin lesion
- Rough sun spots
ICD-10 Codes:
- L570: Actinic keratosis
Also known as:
- Moles
- Birthmarks
- Common Moles, Dysplastic Nevi, and Risk of Melanoma
- Nevi
- Beauty marks
- Skin spots
ICD-10 Codes:
- D229: Melanocytic nevi, unspecified
Also known as:
- Acne Vulgaris
- Acne
- Common acne
- Pimples
- Breakouts
ICD-10 Codes:
- L700: Acne vulgaris
Also known as:
- Plaque Psoriasis
- Psoriasis
- Common psoriasis
- Chronic plaque psoriasis
- Psoriasis of the skin
- Scaly Skin Condition
- Chronic Skin Disease
- Autoimmune Skin Disorder
ICD-10 Codes:
- L400: Psoriasis vulgaris
- L409: Psoriasis, unspecified
What procedures does a Dermatologist like Dr. Thomas typically perform?
As a Dermatologist, Dr. Thomas performs a variety of medical procedures. This procedure information is derived from anonymized insurance claims and highlights the medical procedures most commonly performed by Dr. Thomas. It provides insight into the doctor’s areas of experience and expertise based on real-world patient encounters from the past two years, updated quarterly. Learn more about our claims-based healthcare methodology.
Also known as:
- Ultraviolet Light Therapy
- UV Light Treatment
- Phototherapy
- Actinotherapy
- Light Box Therapy
CPT Codes:
- 96900: Actinotherapy (ultraviolet light)
Does Dr. Thomas accept my insurance?
Dr. Thomas accepts most major insurance plans. Important: Please call our office at (630) 941-2619 before your appointment to verify that your specific plan and network are accepted.
What insurance plans does Dr. Thomas accept in Elmhurst, IL?
Dr. Thomas in Elmhurst, IL accepts plans from many carriers. While this list is updated regularly, it is not a guarantee of coverage.
Top Insurances
Blue Cross Blue Shield of Michigan
Cigna Group
Medicare
UnitedHealth Group
View All Insurances
Where is Dr. Thomas' office located?
What hospitals are Dr. Thomas affiliated with?
Castle Connolly Top Hospital
This doctor is affiliated with a Castle Connolly Top Hospital.
Dr. Thomas has admitting privileges at the following hospitals:
Endeavor Health Edward Hospital,Naperville, IL
Ranked in 3 Specialties

Ranked in 6 Procedures

Endeavor Health Edward Hospital,Naperville, IL
Ranked in 3 Specialties
Ranked in 6 Procedures
Endeavor Health Elmhurst Hospital,Elmhurst, IL
Ranked in 2 Specialties

Ranked in 4 Procedures

Endeavor Health Elmhurst Hospital,Elmhurst, IL
Ranked in 2 Specialties
Ranked in 4 Procedures
Northwestern Medicine Delnor Hospital,Geneva, IL
Gold Standard Top Hospital

Ranked in 3 Specialties

Ranked in 4 Procedures

Northwestern Medicine Delnor Hospital,Geneva, IL
Gold Standard Top Hospital
Ranked in 3 Specialties
Ranked in 4 Procedures
What is Dr. Thomas's NPI number?A National Provider Identifier (NPI) is a unique ID number that identifies doctors and healthcare providers nationwide.
Dr. Thomas's National Provider Identifier (NPI) number is 1528019692.
What common questions do patients ask about Dr. Thomas?
Here are answers to patients Frequently Asked Questions (FAQ’s) about Dr. Thomas
What is Dr. Kathryn Thomas's specialty?
Dr. Thomas is a Dermatologist near Elmhurst, IL.
What does a Dermatologist do?
Dermatologists are medical professionals trained to diagnose and treat a wide range of skin conditions in both children and adults, including skin cancers, melanomas, and other tumors. They also manage disorders of the mouth, external genitalia, hair, and nails, and are skilled in treating conditions like dermatitis, allergic reactions, and skin manifestations of systemic diseases. Dermatologists receive specialized training in dermatopathology and dermatologic surgical techniques, and address cosmetic issues such as hair loss and scarring. Additionally, they use laboratory methods to diagnose immune-related skin disorders, often collaborating with immunohematologists for expert consultation and targeted therapies.
Is Dr. Kathryn Thomas affiliated with a ranked Castle Connolly Top Hospital?
Yes, Dr. Thomas is affiliated with Endeavor Health Edward Hospital, Endeavor Health Elmhurst Hospital, Northwestern Medicine Delnor Hospital which are a Castle Connolly Top Hospitals. Castle Connolly Top Hospitals are healthcare institutions recognized for their excellence in specific medical procedures and overall patient care. They are identified through a rigorous peer nomination process, evaluating factors like patient outcomes, quality of care, and expertise. The list recognizes hospitals that excel in 20 or more specific medical procedures, representing the top 25% nationwide. Castle Connolly Top Hospitals
When to see a Dermatologist?: Guides for symptoms, conditions, and treatments
Understand your symptoms and know when it’s time to see a Dermatologist. Explore insights from trusted medical experts on EverydayHealth.com, where you'll find the most relevant content and helpful condition guides for up-to date information about symptoms, causes, diagnosis, treatment and more. See all our health guides to find trusted information on medical conditions from our experts at Everyday Health.
Is Dr. Kathryn Thomas accepting new patients in Elmhurst, IL?
Yes, Dr. Kathryn Thomas is accepting new patients at this time.
Does Dr. Kathryn Thomas offer online booking?
Please contact Dr. Thomas' office at (630) 941-2619 for information about online booking, telehealth, or to schedule an appointment.
How can I make an appointment with Dr. Kathryn Thomas?
Please contact Dr. Thomas' office at (630) 941-2619 to schedule an appointment.
Where is Dr. Thomas' office located?
Dr. Thomas' offices are located in Elmhurst, IL and Lombard, IL.
Which board certifications does Dr. Kathryn Thomas have?
Dr. Kathryn Thomas is certified by the American Board of Dermatology.
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