51 Years of Experience
Accepting patients
Who is Dr. Hennessey, Specialist in New York, NY?
Dr. N Hennessey, MD is a Specialist, who primarily practices in New York, NY. He has been practicing for over 51 years and is board certified by the American Board of Dermatology. Dr. Hennessey completed his residency at Harvard University's the Deaconess/Brigham Hospital. He is a member of the American Academy of Dermatology, American Medical Association, Society for Investigative Dermatology, and Greater New York Dermatologic Association. Dr. Hennessey is fluent in English and Spanish, and is currently seeing new patients. Dr. Hennessey’s practice accepts Medicare, UnitedHealthcare and other major insurance plans. To book an appointment or to confirm insurance options, please call Dr. Hennessey’s office at (212) 677-5555.
Where did Dr. Hennessey go to medical school and complete their residency?
Fellowship: New York University Medical Center
Residency: Harvard University's the Deaconess/Brigham Hospital | New York University Medical Center
Medical School: Michigan State University
Is Dr. Hennessey board certified in Specialist?
Yes, Dr. N Hennessey, MD is board certified by the American Board of Dermatology
What languages does Dr. Hennessey speak?
Dr. Hennessey and their clinical team can communicate with patients in the following languages:
English
Spanish
What conditions does Dr. Hennessey treat?
As a Specialist, Dr. Hennessey 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. Hennessey. 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:
- 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:
- Bone, Soft Tissue, or Skin Growth of Unknown Type
- Bone Disease
- Skin Condition
- Bone tumor of unknown nature
- Skin lesion of unknown type
- Soft tissue mass of unknown behavior
ICD-10 Codes:
- D492: Neoplasm of unspecified behavior of bone, soft tissue, and skin
Also known as:
- Skin Tumor of Uncertain Behavior
- Thickened Skin Condition
- Dry Skin
- Skin Condition
- Skin Neoplasm
- Skin Growth
- Uncertain Skin Lesion
- Skin hypertrophy
- Hypertrophic skin disorder
- Skin thickening
- Xerosis
- Dry skin condition
- Asteatotic eczema
ICD-10 Codes:
- D485: Neoplasm of uncertain behavior of skin
- L918: Other hypertrophic disorders of the skin
- L853: Xerosis cutis
Also known as:
- Other Skin Pigmentation Issues
- Dark Skin Patches
- Skin Pigmentation Disorder
- Skin color changes
- Pigment abnormalities
- Discolored skin conditions
- Hyperpigmentation
- Melasma
- Age spots
ICD-10 Codes:
- L818: Other specified disorders of pigmentation
- L814: Other melanin hyperpigmentation
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:
- Acne Vulgaris
- Acne
- Common acne
- Pimples
- Breakouts
ICD-10 Codes:
- L700: Acne vulgaris
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:
- Sebaceous Cyst
- Skin Condition
- Epidermoid Cyst
- Keratin Cyst
- Skin Lump
ICD-10 Codes:
- L723: Sebaceous cyst
Also known as:
- Other Long-Term Drug Therapy
- Chronic medication use
- Ongoing drug treatment
- Extended drug therapy
ICD-10 Codes:
- Z79899: Other long term (current) drug therapy
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:
- Personal History of Other Skin Cancer
- Skin Cancer
- Past skin cancer
- Previous cutaneous malignancy
- History of skin tumor
ICD-10 Codes:
- Z85828: Personal history of other malignant neoplasm of skin
Also known as:
- Wart
- Warts
- Skin growth
- Common wart
- Verruca
ICD-10 Codes:
- B079: Viral wart, unspecified
Also known as:
- Seborrheic Dermatitis
- Dandruff, Cradle Cap, and Other Scalp Condition
- Dandruff
- Cradle cap
- Flaky skin condition
ICD-10 Codes:
- L219: Seborrheic dermatitis, unspecified
Also known as:
- Rosacea
- Facial redness
- Adult acne
- Rosy cheeks condition
ICD-10 Codes:
- L719: Rosacea, unspecified
Also known as:
- Skin Hemangioma
- Benign Tumor
- Birthmarks
- Strawberry mark
- Vascular birthmark
- Benign vascular tumor
- Capillary hemangioma
ICD-10 Codes:
- D1801: Hemangioma of skin and subcutaneous tissue
Does Dr. Hennessey accept my insurance?
Dr. Hennessey accepts most major insurance plans. Important: Please call our office at (212) 677-5555 before your appointment to verify that your specific plan and network are accepted.
What insurance plans does Dr. Hennessey accept in New York, NY?
Dr. Hennessey in New York, NY accepts plans from many carriers. While this list is updated regularly, it is not a guarantee of coverage.
Top Insurances
All Other Third Party
CVS Health (formerly Aetna)
Elevance Health Inc. (formerly Anthem)
Express Scripts
Gem Insurance
Healthfirst
Medicare
National Benefit Fund
Service Employees International Union (SEIU)
UnitedHealthcare
View All Insurances
Where is Dr. Hennessey's office located?
Ratings & Reviews
5.0
Overall rating
Based on 45 reviews
Office Experience
98% of patients found the doctor and staff friendly and the office clean and modern
Attentiveness
99% of patients felt that their time spent with the doctor was meaningful and impactful and that any follow ups were addressed quickly
Appointment Booking
94% of patients found it easy to book an appointment
Diagnosis
99% of patients were satisfied with the doctor's diagnosis and explanation of their condition
Patients give Dr. N Hennessey an Excellent overall experience rating of 5 out of 5 stars. Dr. Hennessey has been rated and reviewed by 45 patients. These ratings are based on a variety of factors, including the amount of time patients spent with Dr. Hennessey, his bedside manner, appointment waiting time, friendliness of the office staff, clarity of diagnosis, and more.
Read Patient ReviewsRecognitions
Memberships & Associations
American Academy of Dermatology
Professional Member
American Medical Association
Professional Member
Society for Investigative Dermatology
Professional Member
Greater New York Dermatologic Association
Professional Member
What is Dr. Hennessey's NPI number?An National Provider Identifier (NPI) is a unique ID number that identifies doctors and healthcare providers nationwide.
Dr. Hennessey's National Provider Identifier (NPI) number is 1285694661.
What common questions do patients ask about Dr. Hennessey?
Here are answers to patients Frequently Asked Questions (FAQ’s) about Dr. Hennessey
What is Dr. N Hennessey's specialty?
Dr. Hennessey is a Specialist near New York, NY. Contact Dr. Hennessey to book an appointment today.
Is this Dr. N Hennessey affiliated with a ranked Castle Connolly Top Hospital?
No, Hennessey is not affiliated with a Castle Connolly Top Hospital. Castle Connolly Top Hospitals 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 Specialist?
Explore Specialist 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 N Hennessey accepting new patients in New York, NY?
Yes, Dr. N Hennessey is accepting new patients at this time.
Does Dr. N Hennessey offer online booking?
Please contact Dr. Hennessey's office at (212) 677-5555 for information about online booking, telehealth, or to schedule an appointment.
How can I make an appointment with N Hennessey?
Please contact Dr. Hennessey's office at (212) 677-5555 for information regarding telehealth appointment availability or for scheduling assistance.
Which board certifications does Dr. N Hennessey have?
Dr. N Hennessey is certified by the American Board of Dermatology.
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