DR. N PATRICK HENNESSEY M.D.
NPI 1285694661
Specialist in New York, NY


Quality Rating: 56.61 out of 100 score

NPI Status: Active since March 28, 2006

Contact Information

161 MADISON AVE RM 6SE
NEW YORK, NY
ZIP 10016
Phone: (212) 677-5555
Fax: (212) 677-5558

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  • Individual
  • Male
  • Years of Experience 51
  • Specialist
  • Accepts Medicare Approved Payment
  • PECOS Enrolled
  • Medicare Quality Reporting

About N HENNESSEY

This page provides the complete NPI Profile along with additional information for N Hennessey, a provider established in New York, New York with a medical specialization in Specialist and more than 51 years of experience. He graduated from Michigan State University College Of Human Medicine in 1975. The healthcare provider is registered in the NPI registry with number 1285694661 assigned on March 2006. The practitioner's primary taxonomy code is 174400000X with license number 133471 (NY). The provider is registered as an individual and his NPI record was last updated 4 years ago.

NPI
1285694661
Provider Name
DR. N PATRICK HENNESSEY M.D.
Gender
Male
Entity Type
Individual
Location Address
161 MADISON AVE RM 6SE NEW YORK, NY 10016
Location Phone
(212) 677-5555
Location Fax
(212) 677-5558
Mailing Address
161 MADISON AVE RM 6SE NEW YORK, NY 10016
Mailing Phone
(212) 677-5555
Mailing Fax
(212) 677-5558
Medical School Name
MICHIGAN STATE UNIVERSITY COLLEGE OF HUMAN MEDICINE
Graduation Year
1975
Is Sole Proprietor?
Yes
Enumeration Date
03-28-2006
Last Update Date
09-09-2021
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Specialty - Primary Taxonomy

The NPI enumerator requires providers to submit at least one taxonomy code. A taxonomy code is a unique 10-character code that describes the healthcare provider type, classification, and the area of specialization. There could be only one primary taxonomy code per NPI record. For individual NPIs the license data is associated to the taxonomy code.

Classification

Specialist

Taxonomy Code
174400000X
Type
Other Service Providers
License No.
133471
License State
NY
Taxonomy Description
An individual educated and trained in an applied knowledge discipline used in the performance of work at a level requiring knowledge and skills beyond or apart from that provided by a general education or liberal arts degree.

Medicare Participation & PECOS Enrollment Status

N Hennessey is registered with Medicare and accepts claims assignment, this means the provider accepts the approved amount for the cost of rendered services as full payment. Participating providers may not charge beneficiaries more than the approved amount for their services. Please keep in mind that beneficiaries still have to pay a coinsurance or copayment amount for a visit or service.

N Hennessey is enrolled in PECOS and is eligible to order or refer health care services for Medicare patients. The provider is eligible to order or refer: Part B Clinical Laboratory and Imaging, Durable Medical Equipment (DME), a Home Health Agency (HHA) and Power Mobility Devices.

What is PECOS?
PECOS is the online Medicare enrollment management system or Provider, Enrollment, Chain and Ownership System. The PECOS system is a database of providers who have registered with CMS as providers or suppliers. PECOS is the primary source of information about verified Medicare professionals. Providers that want to participate in this program need to enroll in PECOS with their NPI number to avoid denied claims.

  • Is the provider registered in PECOS? Yes

  • PECOS PAC ID: 8628002110

    What is the PECOS Associate Control ID?
    A PAC ID is a unique 10-digit number assigned to an individual or organization healthcare provider in PECOS. The PAC ID is used to link together all the provider information, like tax identification numbers and organizational names. A PAC ID can be connected to multiple Enrollment IDs if an individual or organization has enrolled in PECOS more than once.

  • PECOS Enrollment ID: I20050923000601

    What is the Provider Enrollment ID?
    The Enrollment ID is a unique alphanumeric 15-digit code assigned to each new provider's PECOS enrollment application. The Enrollment ID is used to link together all the provider enrollment information like enrollment type, state, provider specialty, and reassignment of benefits.

  • Accepts Medicare Assignment? Yes

    What does it mean "accepts medicare assignment"?
    When a provider accepts Medicare assignment, the provider agrees to be paid directly by Medicare and to accept the payment amount approved by Medicare. Additionally, the provider agrees to not bill patients for more than the Medicare deductible and coinsurance amounts.
    A provider who doesn't accept assignment may charge you up to 15% over the Medicare-approved amount. This is known as the limiting charge. You may have to pay this amount, or it may be covered by another insurer.

  • Eligible to Order or Refer Part B Clinical Laboratory and Imaging: Yes

  • Eligible to Order or Refer Durable Medical Equipment (DMEPOS): Yes

  • Eligible to Order or Refer a Home Health Agency (HHA): Yes

  • Eligible to Order or Refer Power Mobility Devices: Yes

Areas of Expertise

The following services and procedures, recently provided to Medicare patients, illustrate the range of care this provider offers. This list reflects the variety of services available to all patients visiting the practice and is based on 2022 Medicare dataset. In general, the more frequently a provider treats specific conditions or performs particular procedures, the more experienced they become in addressing similar patient needs. The provider has delivered many of the services listed below to Medicare patients. Please note that this list does not include services provided to patients who are not covered by Medicare.

Biopsy of fingernail or toenail

A biopsy of a fingernail or toenail is a medical procedure where a small piece of your nail or the tissue under it is removed for testing. This can help diagnose conditions like infections or skin diseases. The area is numbed for your comfort during the process.

This service was performed 11 times for 11 patients

Biopsy of related skin growth, each additional growth

A biopsy of related skin growth is a procedure where a small piece of skin growth is removed for testing. If additional growths are identified, they may also be biopsied. This helps in diagnosing skin conditions and planning appropriate treatment.

This service was performed 130 times for 83 patients

Biopsy of related skin growth, first growth

A biopsy of a skin growth involves taking a small sample of the growth to examine it under a microscope. This helps determine if the growth is harmful. The procedure is typically quick, with minimal discomfort. It's a crucial step in ensuring your skin's health.

This service was performed 333 times for 280 patients

Complicated or multiple drainage of skin abscess

This procedure involves draining one or more skin abscesses, which are pockets of pus that form due to an infection. The process includes making a small cut on the abscess, removing the pus, and cleaning the area to promote healing and prevent further infection.

This service was performed 55 times for 49 patients

Destruction of cancer skin growth of trunk, arms, or legs, 0.6-1.0 cm

This procedure involves the removal of a cancerous skin growth on the trunk, arms, or legs that is between 0.6 and 1.0 cm in size. The goal is to eliminate the cancerous cells and prevent further spread. The method of destruction may vary, including methods such as surgery, laser, or cryotherapy.

This service was performed 22 times for 18 patients

Destruction of precancer skin growth, 1 growth

"Destruction of precancer skin growth" is a procedure that eliminates a single precancerous skin growth. This is done to prevent it from developing into skin cancer. The growth may be removed using various methods such as cryotherapy (freezing), laser therapy, or topical medications.

This service was performed 463 times for 336 patients

Destruction of precancer skin growth, 15 or more growths

This procedure involves removing 15 or more precancerous skin growths to prevent them from developing into cancer. It's done using various methods like freezing, creams, or minor surgery. The goal is to protect your health by stopping cancer before it starts.

This service was performed 51 times for 38 patients

Destruction of precancer skin growth, 2-14 growths

This procedure involves removing 2-14 precancerous skin growths. The growths are treated to prevent them from potentially developing into skin cancer. The process is safe, with minimal discomfort, and promotes healthier skin.

This service was performed 554 times for 238 patients

Destruction of skin growth, 1-14 growths

"Destruction of skin growth" refers to a procedure where 1-14 abnormal skin growths are removed. This is done using methods such as freezing, burning, or laser therapy. It helps prevent the growth from causing discomfort or turning into a more serious condition.

This service was performed 488 times for 364 patients

Destruction of skin growth, 15 or more growths

"Destruction of skin growth" refers to a procedure where unwanted skin growths, such as warts or moles, are removed. In this case, 15 or more growths are treated. Techniques may include freezing, burning, or laser therapy. It's a safe, quick process to improve skin health.

This service was performed 39 times for 34 patients

Established patient office or other outpatient visit, 10-19 minutes

This is a routine check-up for patients who have previously seen the doctor. During this 10-19 minute visit, the doctor will review your health status, discuss any concerns, and manage ongoing treatments or medications. It's a chance to ensure your health is on track.

This service was performed 33 times for 30 patients

Established patient office or other outpatient visit, 20-29 minutes

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

This service was performed 991 times for 627 patients

Established patient office or other outpatient visit, 30-39 minutes

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

This service was performed 453 times for 357 patients

Injection into skin growth, 1-7 growths

This procedure involves injecting medication into 1-7 skin growths. The medication helps to reduce the size of the growths or completely eliminate them. It's a simple, quick, and usually painless process performed by a medical professional.

This service was performed 25 times for 20 patients

Injection, triamcinolone acetonide, not otherwise specified, 10 mg

Triamcinolone acetonide is a medication used to reduce inflammation in the body. It's given as a 10 mg injection for conditions like allergies, arthritis, or skin problems. The injection helps to decrease swelling, redness, and itching.

This service was performed 27 times for 21 patients

Melanoma (skin cancer) excision

Melanoma excision is a procedure where a surgeon removes melanoma, a type of skin cancer, and some surrounding healthy tissue. Local anesthesia is applied to numb the area. The goal is to completely remove the cancer and prevent its spread. Healing time varies.

This service was performed for 12 patients

New patient office or other outpatient visit, 15-29 minutes

This service involves an initial visit to the doctor's office or other outpatient setting. It typically lasts between 15-29 minutes. The doctor will review your medical history, conduct a physical examination, and discuss your health concerns. It's a chance to establish your health baseline and address any immediate medical issues.

This service was performed 18 times for 18 patients

New patient office or other outpatient visit, 30-44 minutes

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

This service was performed 160 times for 160 patients

New patient office or other outpatient visit, 45-59 minutes

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

This service was performed 30 times for 30 patients

Punch biopsy, first skin growth

A punch biopsy is a procedure where a small, circular tool is used to remove a sample of skin tissue. This is usually done to test a skin growth for potential issues. You may feel a pinch, but discomfort is minimal. The area heals quickly.

This service was performed 14 times for 14 patients

Shaving of skin growth of scalp, neck, hands, feet, or genitals, 0.5 cm or less

This is a procedure where a small skin growth on the scalp, neck, hands, or feet, measuring 0.5 cm or less, is carefully removed. The process involves shaving off the growth layer by layer to ensure complete removal. It's a safe and common practice.

This service was performed 16 times for 12 patients

Simple or single drainage of skin abscess

A simple or single drainage of skin abscess is a procedure to remove pus from a skin infection. A small cut is made on the abscess, the pus is drained out, and the area is cleaned. This helps to reduce pain, speed up recovery, and prevent the spread of infection.

This service was performed 83 times for 75 patients

Overall MIPS Quality Performance

The provider participated in CMS Quality Payment Program under the Merit-based Incentive Payment System (MIPS) and has an overall final score of 56.61, based on four performance areas: quality, improvement activities, promoting interoperability, and cost. The purpose of this information is to help people with Medicare make informed decisions and incentivize doctors and clinicians to maximize performance. The provider also has detailed performance information the following quality measures: .

The Merit-based Incentive Payment System (MIPS) is a way providers could use to participate in CMS Quality Payment Program (QPP). The MIPS program affects clinician reimbursement for Part B covered professional services and also rewards them for improving the quality of patient care and outcomes.

  • Final Score: 56.61 out of 100

    The MIPS program evaluates providers across multiple categories with a specific weight for each category resulting a in a MIPS final score that ranges from 0 to 100 points. The MIPS Final Score determines whether providers receive a negative, neutral or positive MIPS payment adjustment.

  • Quality Score: 21.66

    The Quality category assesses providers performance on clinical practices and patient outcomes under the traditional MIPS program. The quality measures help identify the quality of healthcare processes, outcomes, and patient experiences. The Quality measure category compromises 40% providers final MPIS scores.

    There are six collection types for MIPS quality measures: Electronic Clinical Quality Measures (eCQMs), MIPS Clinical Quality Measures (CQMs), Qualified Clinical Data Registry (QCDR) Measures, Medicare Part B claims measures, CMS Web Interface measures and The Consumer Assessment of Healthcare Providers and Systems (CAHPS) for MIPS Survey.

  • Promoting Interoperability Score: 99

    The Interoperability category measures the providers ability to use technology to exchange and make use of healthcare information in a way that is less burdensome and improves outcomes. The Interoperability measure category compromises 25% providers final MPIS scores.

    The MIPS Interoperability measure focuses on the use of certified electronic health record technology (CEHRT) to improve patient access health information, the exchange of information between clinicians and pharmacies and the systematic collection, analysis, and interpretation of healthcare data.

  • Improvement Activities Score: 40

    The Improvement Activities performance category evaluates the providers participation in clinical activities that support the improvement of clinical practice, care delivery, and outcomes. Providers have the option to choose 2 to 4 activities from an inventory of over 100 improvement activities. Providers typically choose the activities that best fit their needs. The improvement activities measure category compromises 15% providers final MPIS scores.

    The Improvement measures aim to better patient engagement, patient safety and other areas of patient care. The Improvement Activities category compromises 15% of providers final MPIS scores.

  • Cost Score: N/A

    The Cost performance category asses the amount and types of services provided and how clinicians coordinate care and seek improvement of health outcomes by ensuring patients receive the appropriate services.

    Although providers don't determine the price of healthcare services they are important in delivering high-quality care at a reasonable cost. The Cost measures category compromises 20% of providers final MPIS scores.

  • Cost Score: N/A

    The Cost performance category asses the amount and types of services provided and how clinicians coordinate care and seek improvement of health outcomes by ensuring patients receive the appropriate services.

    Although providers don't determine the price of healthcare services they are important in delivering high-quality care at a reasonable cost. The Cost measures category compromises 20% of providers final MPIS scores.

MIPS Quality Measures

The following performance measures were reported under the Merit-Based Incentive Payment System (MIPS) and Qualified Clinical Data Registry (QCDR) quality measures program.

Quality Measure Performance Number of Patients
e-Prescribing 87% 502
Provide Patients Electronic Access to Their Health Information 100% 427

Find Provider Hospital Affiliations - Privileges

Doctors and physicians must apply for hospital privileges to treat patients at hospitals. Find out if your doctor has privileges to practice at your preferred hospital by using the hospital affiliation information below based on recent medical claims.

Hospital affiliation is identified through self-reporting data, inpatient, outpatient, physician and ancillary service claims linked by the medical claims NPI number and place of service code. Additionally, to further determine provider hospital affiliation the clinician must have provided services to at least three patients on three different dates in the last 12 months. N Hennessey is affiliated with the following medical facilities:

Hospital Name Address Phone Hospital Type Overall Rating
SUNY/STONY BROOK UNIVERSITY HOSPITALHEALTH SCIENCES CENTER SUNY
STONY BROOK, NY 11794
(631) 444-4000Acute Care Hospitals

Reviews for DR. N PATRICK HENNESSEY M.D.

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NPI Validation Check Digit Calculation


The following table explains the step by step NPI number validation process using the ISO standard Luhn algorithm.

Start with the original NPI number, the last digit is the check digit and is not used in the calculation.
1285694661
Step 1: Double the value of the alternate digits, beginning with the rightmost digit.
221651298612
Step 2: Add all the doubled and unaffected individual digits from step 1 plus the constant number 24.
2 + 2 + 1 + 6 + 5 + 1 + 2 + 9 + 8 + 6 + 1 + 2 + 24 = 69
Step 3: Subtract the total obtained in step 2 from the next higher number ending in zero, the result is the check digit.
70 - 69 = 11

The NPI number 1285694661 is valid because the calculated check digit 1 using the Luhn validation algorithm matches the last digit of the original NPI number.

Other Providers at the Same Location


The following provider is registered at the same or nearby location.

NPI Name / Type Taxonomy Address
1790818623HENNESSEY DERMATOLOGY LLC
Organization
Specialist161 MADISON AVE RM 6SE
NEW YORK, NY 10016
(212) 677-5555

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1285694661, enumerated in the NPI registry as an "individual" on March 28, 2006

The provider is located at 161 Madison Ave Rm 6se New York, Ny 10016 and the phone number is (212) 677-5555

The provider's speciality is Specialist with taxonomy code 174400000X

The provider has more than 51 years of experience. He graduated from Michigan State University College Of Human Medicine in 1975.

Yes, as of June 20, 2025 the provider is registered in PECOS and is eligible to order health care services or supplies for Medicare patients. If you are a beneficiary the provider is eligible to order or refer: Part B Clinical Laboratory and Imaging, Durable Medical Equipment (DME), a Home Health Agency (HHA) and Power Mobility Devices.

The provider has an overall high rating in the following quality measures: uses technology to exchange and make use of healthcare information. The provider obtained a high score in the following performance measures: Provide Patients Electronic Access to Their Health Information. The quality ratings are based on unbiased reviews and reported submissions to Medicare's Quality Payment Program.

The most common procedures or services performed by this practitioner are: Biopsy of fingernail or toenail, Biopsy of related skin growth, each additional growth, Biopsy of related skin growth, first growth, Complicated or multiple drainage of skin abscess, Destruction of cancer skin growth of trunk, arms, or legs, 0.6-1.0 cm, Destruction of precancer skin growth, 1 growth, Destruction of precancer skin growth, 15 or more growths, Destruction of precancer skin growth, 2-14 growths, Destruction of skin growth, 1-14 growths, Destruction of skin growth, 15 or more growths, Established patient office or other outpatient visit, 10-19 minutes, Established patient office or other outpatient visit, 20-29 minutes, Established patient office or other outpatient visit, 30-39 minutes, Injection into skin growth, 1-7 growths, Injection, triamcinolone acetonide, not otherwise specified, 10 mg, Melanoma (skin cancer) excision, New patient office or other outpatient visit, 15-29 minutes, New patient office or other outpatient visit, 30-44 minutes, New patient office or other outpatient visit, 45-59 minutes, Punch biopsy, first skin growth, Shaving of skin growth of scalp, neck, hands, feet, or genitals, 0.5 cm or less and Simple or single drainage of skin abscess.

The practitioner is affiliated to the following hospital(s): SUNY/STONY BROOK UNIVERSITY HOSPITAL. Hospital affiliations are identified through self-reporting data and service claims based on the place of service.

This NPI record was last updated on March 28, 2006. To officially update your NPI information contact the National Plan and Provider Enumeration System (NPPES) at 1-800-465-3203 (NPI Toll-Free) or by email at [email protected].
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