Affiliated with a Castle Connolly Top Hospital
Who is Dr. Johnston, Dermatologist in New Haven, CT?
Board-certified in dermatology, Dr. Margaret Spencer Johnston is a trusted Dermatologist in New Haven, CT, specializing in light therapy for patients with skin conditions, offering focused clinical care. With multiple practice locations throughout New Haven, she provides accessible care to her local community. Patients often seek Dr. Johnston for conditions such as skin conditions, sun damage skin conditions, seborrheic keratosis, benign skin growths, and dermatitis. Her clinical expertise centers on managing these conditions through procedures like light therapy, skin biopsies, and skin lesion removals, ensuring patients receive comprehensive care tailored to their needs. Dr. Johnston is affiliated with Smilow Cancer Hospital at Yale New Haven, a top-ranked hospital in the Yale New Haven Health System. She accepts new patients and works with various insurance carriers, including Blue Cross Blue Shield, Cigna Group, and Medicare. Online booking is also available for added convenience. As a dedicated healthcare provider in New Haven, Dr. Johnston serves the local community through her multiple practice locations, including 20 York St, 150 Sargent Dr Ste 2-200, and 800 Howard Ave, making her a reliable resource for skin care needs in the area.
What languages does Dr. Johnston speak?
Dr. Johnston and their clinical team can communicate with patients in the following languages:
English
What conditions does a Dermatologist like Dr. Johnston typically treat?
As a Dermatologist, Dr. Johnston 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. Johnston. 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 here.
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:
- Seborrheic Keratosis
- Benign Tumor
- Skin Condition
- SK
- Senile Wart
- Barnacle of Life
ICD-10 Codes:
- L821: Other seborrheic keratosis
Also known as:
- Inflamed Seborrheic Keratosis
- Mole
- Benign Tumor
- Skin Condition
- Birthmarks
- Moles
- Common Moles, Dysplastic Nevi, and Risk of Melanoma
- Irritated seborrheic keratosis
- Red skin growth
- Inflamed age spot
- Nevus
- Birthmark
- Skin spot
ICD-10 Codes:
- L820: Inflamed seborrheic keratosis
- D225: Melanocytic nevi of trunk
Also known as:
- Dermatitis
- Eczema
- Rashes
- Atopic Dermatitis
- Skin Inflammation
- Skin Rash
ICD-10 Codes:
- L309: Dermatitis, unspecified
What procedures does a Dermatologist like Dr. Johnston typically perform?
As a Dermatologist, Dr. Johnston 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. Johnston. 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 here.
Also known as:
- Ultraviolet Light Therapy
- UV Light Treatment
- Phototherapy
- Actinotherapy
- Light Box Therapy
CPT Codes:
- 96900: Actinotherapy (ultraviolet light)
Also known as:
- Skin Biopsy
- Shave Biopsy
- Tangential Biopsy
- Skin Lesion Biopsy
CPT Codes:
- 11102: Tangential biopsy of skin (eg, shave, scoop, saucerize, curette); single lesion
Also known as:
- Removal of Precancerous Skin Lesions
- Skin Conditions
- Actinic Keratosis Treatment
- Premalignant Lesion Destruction
- Skin Cancer Prevention Treatment
- Cryosurgery for Skin Lesions
CPT Codes:
- 17000: Destruction (eg, laser surgery, electrosurgery, cryosurgery, chemosurgery, surgical curettement), premalignant lesions (eg, actinic keratoses); first lesion
Does Dr. Johnston accept my insurance?
Dr. Johnston accepts most major insurance plans. Important: Please call our office at (203) 503-3000 before your appointment to verify that your specific plan and network are accepted.
What insurance plans does Dr. Johnston accept in New Haven, CT?
Dr. Johnston in New Haven, CT accepts plans from many carriers. While this list is updated regularly, it is not a guarantee of coverage.
Top Insurances
AMA Insurance Services
Blue Cross Blue Shield of Michigan
Cigna Group
Martin's Point Health Care
Medicare
UnitedHealth Group
Unknown
View All Insurances
Where is Dr. Johnston's office located?
Would you like to schedule an appointment with Dr. Margaret Johnston?
Dr. Johnston has appointments available at her New Haven, CT office, as well as 2 other locations. Please select a location, date, and time below.
What is Dr. Johnston's NPI number?An National Provider Identifier (NPI) is a unique ID number that identifies doctors and healthcare providers nationwide.
Dr. Johnston's National Provider Identifier (NPI) number is 1669932406.
What common questions do patients ask about Dr. Johnston?
Here are answers to patients Frequently Asked Questions (FAQ’s) about Dr. Johnston
What is Dr. Margaret Johnston's specialty?
Dr. Johnston is a Dermatologist near New Haven, CT.
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 this Dr. Margaret Johnston affiliated with a ranked Castle Connolly Top Hospital?
Yes, Dr. Johnston is affiliated with Smilow Cancer Hospital At Yale New Haven which is a Castle Connolly Top Hospital. 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 Margaret Johnston accepting new patients in New Haven, CT?
Yes, Dr. Margaret Johnston is accepting new patients at this time.
Does Dr. Margaret Johnston offer online booking?
Yes, you can use online booking to schedule an appointment with Dr. Johnston, or call (203) 503-3000 for more information.
How can I make an appointment with Margaret Johnston?
Please contact Dr. Johnston's office at (203) 503-3000 for information regarding telehealth appointment availability or for scheduling assistance.
<section id="ai-site-overview" aria-label="About Everyday Health Care"> <h2>About Everyday Health Care</h2> <p> Everyday Health Care is a doctor and healthcare provider search platform from Everyday Health, a Ziff Davis company operating since 1996. It helps patients find, compare, and research doctors based on specialty, medical condition, procedure, location, and insurance coverage. </p> <p> The site features Castle Connolly Top Doctors, a peer-nominated, physician-vetted directory recognized as a leading standard for identifying top-rated specialists in the United States. Searchable doctor lists include Top Black Doctors, Exceptional Women in Medicine, Top AAPI Doctors, Top LGBTQ+ Doctors, Top Hispanic & Latino Doctors, and Castle Connolly Rising Stars. </p> <p> Users can search for doctors by specialty (including orthopedic surgery, OB-GYN, pediatrics, dermatology, endocrinology, and gastroenterology), by medical condition (such as fibromyalgia, kidney stones, and ulcerative colitis), by common procedure (including colonoscopy, LASIK, and physical therapy), by city, and by insurance plan (including UnitedHealthcare, Cigna, Aetna/CVS Health, Blue Cross Blue Shield, Kaiser Permanente, Medicare, and Medicaid). </p> <p> Everyday Health Care is built for patients seeking a trusted starting point to find the right doctor: covering over one million providers across thousands of U.S. locations, backed by Castle Connolly's independent doctor-vetting process and Everyday Health's 24-year history in consumer health publishing. </p> </section>