DR. JOHN BYRNE M.D.
NPI 1144227208
Allergy & Immunology in Riverhead, NY

Q: What is John Byrne's NPI number?

The NPI number for John Byrne is 1144227208. It was assigned to this individual provider in the NPPES registry on July 5, 2005.

Q: What is John Byrne's specialty?

The primary specialty registered for this NPI is Allergy & Immunology with taxonomy code 207K00000X.

Q: When was this NPI record last updated?

The NPPES record for John Byrne was last updated on May 21, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since July 05, 2005PECOS EnrolledAccepts Medicare Assignment

1149 OLD COUNTRY ROAD, SUITE E-1, RIVERHEAD, NY 11901(631) 591-2209(631) 591-2194 Get Directions Write a Review

NPPES record last updated: May 21, 2014. Verified against the NPPES registry weekly; last sync: October 18, 2026.

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About Dr. John Byrne M.d. NPPES

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

DR. JOHN BYRNE M.D. (NPI 1144227208) is an individual allergy & immunology provider in Riverhead, New York, licensed in New York (2113491) and active in the NPI registry since July 2005. He is enrolled in Medicare PECOS, is affiliated with Suny/stony Brook University Hospital, and is a graduate of New York Medical College (1995).

NPPES Registry Identity

NPI1144227208

Entity TypeIndividualMale

Primary Taxonomy207K00000X

Provider Legal NameDR. JOHN BYRNECredential: M.D.

Location Address1149 OLD COUNTRY ROAD, SUITE E-1Riverhead, NY 11901-2063

Mailing Address1149 Old Country Road, Suite E-1Riverhead, NY 11901-2063 · (631) 591-2209 · Fax (631) 591-2194

Phone(631) 591-2209

Fax(631) 591-2194

Sole ProprietorNo

Medical School CMSNew York Medical CollegeGraduated 1995

Enumeration DateJuly 5, 2005

Last NPPES UpdateMay 21, 2014

✔ NPI 1144227208 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAllergy & ImmunologyAllopathic & Osteopathic Physicians

Taxonomy Code207K00000X

License✔ Licensed in NY · 2113491

Definition

An allergist-immunologist is trained in evaluation, physical and laboratory diagnosis, and management of disorders involving the immune system. Selected examples of such conditions include asthma, anaphylaxis, rhinitis, eczema, and adverse reactions to drugs, foods, and insect stings as well as immune deficiency diseases (both acquired and congenital), defects in host defense, and problems related to autoimmune disease, organ transplantation, or malignancies of the immune system.

1149 OLD COUNTRY ROAD, Riverhead, NY 11901

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Other Identifiers 2

Medicare ID-Type Unspecified42C731NY

Medicare UPING78132NY

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. John Byrne M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID7719990696

PECOS Enrollment IDI20060718000279

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

Medicare enrollment records show John Byrne reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

East End Allergy And Asthma Care, PC

Same address

Allergy & Immunology

1149 OLD COUNTRY ROAD, SUITE E-1
Riverhead, NY 11901

Reassigned Medicare billing, New York enrollment

NPI 1669424065 (631) 591-2209

Three Village Allergy & Asthma, PLLC

21 mi

Multi-Specialty

3771 NESCONSET HWY STE 105
South Setauket, NY 11720

Reassigned Medicare billing, New York enrollment
3 clinicians in this Medicare group

NPI 1568718971 (631) 675-6474

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 12

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Test for allergy using allergenic extract 95004

An allergy test with allergenic extract is a diagnostic method to identify substances causing allergic reactions. Small amounts of common allergens are introduced to your body, usually through skin pricks or blood tests. Your body's response helps determine your allergies.

5,371 services77 patients

Test for allergy using skin patch 95044

A skin patch test helps identify allergens causing skin reactions. Small patches with potential allergens are applied to your skin, usually on the back. After 48 hours, they are removed to check for reactions. It's a safe and effective way to diagnose allergies.

2,800 services35 patients

Professional service for multiple injections of allergen 95117

The professional service for multiple injections of allergens involves administering small doses of specific allergens into your body. This is done to help your immune system become less sensitive to them, reducing your allergic reaction over time. It's a safe, effective way to manage allergies.

457 services33 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

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.

309 services133 patients

Professional service for preparation and provision of 1 or more antigens 95165

This service involves the creation and supply of antigens, substances that stimulate your immune system to fight diseases. These antigens can be used in vaccines or allergy tests to help your body build defenses against specific health threats.

307 services20 patients

Professional service for single injection of allergen 95115

A single allergen injection is a procedure where a small amount of a specific allergen is injected into your body. This is done to test your body's reaction to the allergen or to help your immune system become less sensitive to it, reducing allergic symptoms.

155 services13 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

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.

68 services50 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

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.

50 services50 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

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.

30 services30 patients

Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more 99212

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.

23 services17 patients

Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional 99211

This service involves an outpatient visit for established patients who may not need direct interaction with a healthcare professional. It could include reviewing test results, monitoring existing conditions, or adjusting treatment plans. It's typically done remotely, ensuring your comfort and convenience.

15 services11 patients

Test to measure expiratory airflow and volume 94010

This test, known as spirometry, assesses how well your lungs work. It measures how much air you can inhale, how much you can exhale and how quickly you can exhale. It's non-invasive and helps diagnose conditions like asthma or COPD.

13 services13 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Suny/Stony Brook University Hospital

Acute Care Hospitals · Stony Brook, NY

4/5 CMS rating

OwnershipGovernment - State

CMS Certification Number330393

LocationHealth Sciences Center SunyStony Brook, NY 11794 · Suffolk County

Emergency services Birthing friendly

Other Providers at the Same Location NPPES 2

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

EAST SAFFOLK DENTAL PC

Dentist

1149 OLD COUNTRY ROAD
RIVERHEAD, NY 11901

Suffolk County (631) 369-7400

EAST END ALLERGY AND ASTHMA CARE, PC

Allergy & Immunology

1149 OLD COUNTRY ROAD, SUITE E-1
RIVERHEAD, NY 11901

Suffolk County (631) 591-2209

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is John Byrne's NPI number?

The NPI number for John Byrne is 1144227208. It was assigned to this individual provider in the NPPES registry on July 5, 2005.

Where is John Byrne located?

John Byrne practices at 1149 Old Country Road Suite E-1, Riverhead, NY 11901. The listed phone number is (631) 591-2209.

What is John Byrne's specialty?

The primary specialty registered for this NPI is Allergy & Immunology with taxonomy code 207K00000X.

Is John Byrne enrolled in Medicare?

Yes. John Byrne is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for John Byrne's services?

According to the CMS Revalidation Reassignment List (October 2026 release), John Byrne reassigns Medicare benefits to 2 organizations: East End Allergy And Asthma Care, PC (Riverhead, NY) and Three Village Allergy & Asthma, PLLC (South Setauket, NY). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for John Byrne's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is John Byrne affiliated with any hospitals?

According to CMS data, John Byrne is affiliated with Suny/Stony Brook University Hospital.

When was this NPI record last updated?

The NPPES record for John Byrne was last updated on May 21, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.