51 Years of Experience
Accepting patients
Affiliated with a Castle Connolly Top Hospital
Who is Dr. Hennessey, Specialist in New York, NY?
Dr. N Hennessey, MD is a Specialist, who primarily practices in New York, NY with 1 additional practice location. He has been practicing for over 51 years and is board certified. 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 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 as a 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 a Specialist like Dr. Hennessey typically 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. Learn more about our claims-based healthcare methodology.
Also known as:
- Other Skin Pigmentation Issues
- Skin Pigmentation Disorder
- Skin color changes
- Pigment abnormalities
- Discolored skin conditions
ICD-10 Codes:
- L818: Other specified disorders of pigmentation
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:
- Inflamed Seborrheic Keratosis
- Benign Tumor
- Skin Condition
- Irritated seborrheic keratosis
- Red skin growth
- Inflamed age spot
ICD-10 Codes:
- L820: Inflamed seborrheic keratosis
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:
- 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:
- Acne Vulgaris
- Acne
- Common acne
- Pimples
- Breakouts
ICD-10 Codes:
- L700: Acne vulgaris
Also known as:
- Sebaceous Cyst
- Skin Condition
- Epidermoid Cyst
- Keratin Cyst
- Skin Lump
ICD-10 Codes:
- L723: Sebaceous cyst
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
Gem Insurance
Healthfirst New York
Medicare
Molina Healthcare
National Benefit Fund
New York City Health and Hospitals Corporation
Service Employees International Union (SEIU)
UnitedHealth Group
Unknown
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.
Is this Dr. N Hennessey affiliated with a ranked Castle Connolly Top Hospital?
Yes, Dr. Hennessey is affiliated with Stony Brook Southampton Hospital, Nyu Langone Health - Tisch 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 Specialist?: Guides for symptoms, conditions, and treatments
Understand your symptoms and know when it’s time to see a Specialist. 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 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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