MJ
Accepting patients
Affiliated with a Castle Connolly Top Hospital
Who is Dr. Johnston, Dermatologist in New Haven, CT?
Dr. Margaret Johnston is a Dermatologist, who primarily practices in New Haven, CT with 2 additional practice locations. She is board certified. Dr. Johnston is fluent in English, and is currently seeing new patients. Dr. Johnston’s practice accepts Medicare, UnitedHealthcare and other major insurance plans. To book an appointment or to confirm insurance options, please call Dr. Johnston’s office at (203) 503-3000.
What languages does Dr. Johnston speak?
Dr. Johnston and their clinical team can communicate with patients in the following languages:
English
What conditions does Dr. Johnston 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.
Also known as:
- Skin Tumor of Uncertain Behavior
- Skin Rash
- Skin Condition
- Rashes
- Skin Neoplasm
- Skin Growth
- Uncertain Skin Lesion
- Skin Eruption
- Hives
- Dermatitis
- Skin Inflammation
ICD-10 Codes:
- D485: Neoplasm of uncertain behavior of skin
- R21: Rash and other nonspecific skin eruption
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:
- Lichen Sclerosus
- Skin Condition
- Lichen Sclerosus et Atrophicus
- White Spot Disease
- LS Skin Condition
ICD-10 Codes:
- L900: Lichen sclerosus et atrophicus
Also known as:
- Dermatitis
- Eczema
- Rashes
- Atopic Dermatitis
- Skin Inflammation
- Skin Rash
ICD-10 Codes:
- L309: Dermatitis, unspecified
Also known as:
- Skin Cancer Screening
- Skin Cancer Screening (PDQ®)
- Mole Check
- Dermatology Screening
- Melanoma Screening
- Skin Exam
ICD-10 Codes:
- Z1283: Encounter for screening for malignant neoplasm of skin
Also known as:
- Seborrheic Dermatitis
- Dandruff, Cradle Cap, and Other Scalp Condition
- Dandruff
- Cradle cap
- Seborrheic eczema
ICD-10 Codes:
- L218: Other seborrheic dermatitis
Also known as:
- Other Eczema or Rash
- Eczema
- Rashes
- Atopic Dermatitis
- Uncommon dermatitis
- Atypical eczema
- Skin inflammation
ICD-10 Codes:
- L308: Other specified dermatitis
Also known as:
- Epidermal Cyst
- Skin Condition
- Sebaceous Cyst
- Keratin Cyst
- Epidermoid Cyst
ICD-10 Codes:
- L720: Epidermal cyst
Also known as:
- Chronic Radiation Skin Changes
- Skin Condition
- Long-term radiation dermatitis
- Skin damage from radiation
- Non-ionizing radiation skin effects
ICD-10 Codes:
- L578: Other skin changes due to chronic exposure to nonionizing radiation
Also known as:
- Vitiligo
- Skin depigmentation
- White patches on skin
- Loss of skin color
ICD-10 Codes:
- L80: Vitiligo
Which procedures does Dr. Johnston perform as a Dermatologist?
As a Dermatologist, procedures performed by a Dr. Margaret Johnston may include:
- Ambulatory Phlebectomy
- Annual Skin Screening
- Anti-Aging Treatment
- Biopsy
- Botox Follow Up
- Botox Treatment
- Chemical Peel
- Collagen Injection
For detailed information, please contact Dr. Johnston's office.
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
BlueCross and BlueShield of Vermont
CDPHP
CVS Health (formerly Aetna)
Excellus BlueCross BlueShield
Express Scripts
Martin's Point
Medicare
Other TPA
UnitedHealthcare
View All Insurances
Where is Dr. Johnston's office located?
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. 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. Contact Dr. Johnston to book an appointment today.
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
Where can I learn more about Dermatologist?
Explore Dermatologist with 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?
Please contact Dr. Johnston's office at (203) 503-3000 for information about online booking, telehealth, or to schedule an appointment.
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.
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