MARY KATHRYN GIANNICO PA
NPI 1154908390
Physician Assistant in Port Jefferson, NY

Active since March 25, 2021PECOS EnrolledAccepts Medicare Assignment
75 N COUNTRY RD, PORT JEFFERSON, NY 11777(631) 473-1320 Get Directions Write a Review

NPPES record last updated: July 8, 2025. Verified against the NPPES registry weekly; last sync: July 19, 2026.

Record update history: Jul 8, 2025, Mar 25, 2021 (2 updates tracked since 2021).

About Mary Kathryn Giannico Pa NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MARY KATHRYN GIANNICO PA (NPI 1154908390) is an individual physician assistant provider in Port Jefferson, New York, licensed in New York (026500) and active in the NPI registry since March 2021. She is enrolled in Medicare PECOS, is affiliated with John T Mather Memorial Hospital Of Port Jefferson, and is a graduate of Other (2021).Information from the official NPPES registry record, last updated July 8, 2025.

NPPES Registry Identity

NPI1154908390
Entity TypeIndividualFemale
Provider Legal NameMARY KATHRYN GIANNICOCredential: PA
Location Address75 N COUNTRY RDPort Jefferson, NY 11777-2119
Mailing Address134 Barrett AveBayport, NY 11705-1415 · (631) 525-7318
Sole ProprietorNo
Medical School CMSOtherGraduated 2021
Enumeration DateMarch 25, 2021
Last NPPES UpdateJuly 8, 20252 updates tracked since enumeration
NPPES CertifiedJuly 8, 2025
NPI 1154908390 is a valid, active identifier and passes the ISO check-digit test. How NPI validation works

Primary Specialty

Physician Assistant

Taxonomy 363A00000X · Physician Assistants & Advanced Practice Nursing Providers

Licensed in NY · 026500

A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the… Show more

Also Listed

Physician Assistant · Surgical

Taxonomy 363AS0400X · Physician Assistants & Advanced Practice Nursing Providers

Licensed in NY · 026500
75 N COUNTRY RD, Port Jefferson, NY 11777

Medicare Participation & PECOS Enrollment Status

Mary Giannico 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.

Mary Giannico 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: 7416365390

    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: I20210413002384

    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

Physician Visit Costs



The typical physician office visit costs for Medicare beneficiaries in this area are: $26.26 for a new patient copayment and $20.86 for an established patient copayment.

The pricing information below displays the copayment minimum, maximum and average amount that patients under Medicare are charged when visiting this provider as a new or established patient. Please keep in mind that these prices are just for reference purposes, and the actual prices charged by the provider might be different.

For patients covered under private health plans the prices below are also useful as healthcare pricing for private insurance is usually established as a function of Medicare prices. Private insurance covered patients should check their individual plans to determine the exact pricing.

The prices below reflect the costs for new and established patients in the 11777 ZIP code area.

New Patients Visit Costs *

The most utilized procedure code for new patients office visits is 99203

  • Average New Patient Price $105.06
  • Minimum New Patient Price $67.4
  • Maximum New Patient Price $203.53
  • Average New Patient Copayment $26.26
  • Minimum New Patient Copayment $16.85
  • Maximum New Patient Copayment $50.88

Established Patients Visit Costs *

The most utilized procedure code for established patients office visits is 99213

  • Average Established Patient Price $83.44
  • Minimum Established Patient Price $21.66
  • Maximum Established Patient Price $164.45
  • Average Established Patient Copayment $20.86
  • Minimum Established Patient Copayment $5.41
  • Maximum Established Patient Copayment $41.11

* The physician office visit costs information is generated by statistical analysis of similar providers in the same geographical area. The pricing information above IS NOT the amount charged by this provider.

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. Mary Giannico is affiliated with the following medical facilities:

Hospital Name Address Phone Hospital Type Overall Rating
JOHN T MATHER MEMORIAL HOSPITAL OF PORT JEFFERSON75 NORTH COUNTRY ROAD
PORT JEFFERSON, NY 11777
(631) 473-1320Acute Care Hospitals

Reviews for MARY KATHRYN GIANNICO PA

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Other Providers at the Same Location


The following 20 providers are registered at the same or a nearby location.

Internal Medicine
75 N COUNTRY RD
PORT JEFFERSON, NY 11777
Internal Medicine (Geriatric Medicine)
75 N COUNTRY RD
PORT JEFFERSON, NY 11777
Physician Assistant
75 N COUNTRY RD
PORT JEFFERSON, NY 11777
Radiology (Diagnostic Radiology)
75 N COUNTRY RD
PORT JEFFERSON, NY 11777
Nurse Practitioner (Family)
75 N COUNTRY RD
PORT JEFFERSON, NY 11777
Emergency Medicine (Emergency Medical Services)
75 N COUNTRY RD
PORT JEFFERSON, NY 11777
Hospitalist
75 N COUNTRY RD
PORT JEFFERSON, NY 11777
Nurse Practitioner (Adult Health)
75 N COUNTRY RD
PORT JEFFERSON, NY 11777
Emergency Medicine
75 N COUNTRY RD
PORT JEFFERSON, NY 11777
Physician Assistant
75 N COUNTRY RD
PORT JEFFERSON, NY 11777
Internal Medicine
75 N COUNTRY RD
PORT JEFFERSON, NY 11777
Hospitalist
75 N COUNTRY RD
PORT JEFFERSON, NY 11777
General Acute Care Hospital
75 N COUNTRY RD
PORT JEFFERSON, NY 11777
Surgery
75 N COUNTRY RD
PORT JEFFERSON, NY 11777
Nurse Practitioner (Adult Health)
75 N COUNTRY RD
PORT JEFFERSON, NY 11777
Nurse Practitioner (Adult Health)
75 N COUNTRY RD
PORT JEFFERSON, NY 11777
Pharmacist
75 N COUNTRY RD
PORT JEFFERSON, NY 11777
Neuromusculoskeletal Medicine & OMM
75 N COUNTRY RD
PORT JEFFERSON, NY 11777
Radiology (Diagnostic Radiology)
75 N COUNTRY RD
PORT JEFFERSON, NY 11777
Nurse Practitioner (Adult Health)
75 N COUNTRY RD
PORT JEFFERSON, NY 11777

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1154908390, enumerated as an "individual" on March 25, 2021.

The provider is located at 75 N COUNTRY RD PORT JEFFERSON, NY 11777 and the phone number is (631) 473-1320.

Physician Assistant with taxonomy code 363A00000X.

Mary Giannico is affiliated with: JOHN T MATHER MEMORIAL HOSPITAL OF PORT JEFFERSON.