DR. CHRISTOPHER MICHAEL BRENNAN M.D.
NPI 1174771323
Internal Medicine in West Islip, NY

Q: What is Christopher Brennan's NPI number?

The NPI number for Christopher Brennan is 1174771323. It was assigned to this individual provider in the NPPES registry on August 29, 2008.

Q: What is Christopher Brennan's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Active since August 29, 2008PECOS EnrolledAccepts Medicare Assignment

1000 MONTAUK HIGHWAY, HOSPITALIST DEPARTMENT 3RD FLOOR, WEST ISLIP, NY 11795(631) 376-3610 Get Directions Write a Review

NPPES record last updated: May 19, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: May 19, 2025, Nov 20, 2024 (2 updates tracked since 2024).

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About Dr. Christopher Michael Brennan M.d. NPPES

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

DR. CHRISTOPHER MICHAEL BRENNAN M.D. (NPI 1174771323) is an individual internal medicine provider in West Islip, New York, licensed in New York (277549) and active in the NPI registry since August 2008. He is enrolled in Medicare PECOS, is affiliated with St Francis Hospital - The Heart Center, and is a graduate of Other (2007).

NPPES Registry Identity

NPI1174771323

Entity TypeIndividualMale

Primary Taxonomy207R00000X

Provider Legal NameDR. CHRISTOPHER MICHAEL BRENNANCredential: M.D.

Location Address1000 MONTAUK HIGHWAY, HOSPITALIST DEPARTMENT 3RD FLOORWest Islip, NY 11795

Mailing Address1000 Montauk Highway, Hospitalist OfficeWest Islip, NY 11795 · (631) 376-3610

Phone(631) 376-3610

Sole ProprietorNo

Medical School CMSOtherGraduated 2007

Enumeration DateAugust 29, 2008

Last NPPES UpdateMay 19, 20252 updates tracked since enumeration

NPPES CertifiedMay 19, 2025

✔ NPI 1174771323 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207R00000X

Licenses✔ Licensed in NY · 277549✔ Licensed in RI · MD13459✔ Licensed in MA · 246004

Definition

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

1000 MONTAUK HIGHWAY, West Islip, NY 11795

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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. Christopher Michael Brennan 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 ID3476722802

PECOS Enrollment IDI20141208001067

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 Christopher Brennan reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Southwest Suffolk Medical PC

3.8 mi

Family Medicine

502 S WELLWOOD AVE
Lindenhurst, NY 11757

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

NPI 1770919763 (631) 226-8600

Prospect Chartercare Rwmc, LLC

125 mi

Internal Medicine

825 CHALKSTONE AVE
Providence, RI 02908

Reassigned Medicare billing, Rhode Island enrollment
162 clinicians in this Medicare group

NPI 1285059287 (401) 456-2000

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 3

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.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

581 services196 patients

Hospital discharge day management, more than 30 minutes 99239

Hospital discharge day management over 30 minutes involves a detailed process to ensure a smooth transition from hospital to home. It includes final examinations, discussion of your hospital stay, post-discharge instructions, and coordinating follow-up care.

155 services150 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233

Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.

24 services21 patients

Hospital Affiliations CMS Care Compare 2

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

St Francis Hospital - The Heart Center

Acute Care Hospitals · Roslyn, NY

5/5 CMS rating

OwnershipVoluntary non-profit - Church

CMS Certification Number330182

Location100 Port Washington BoulevardRoslyn, NY 11576 · Nassau County

Emergency services

Good Samaritan Hospital Medical Center

Acute Care Hospitals · West Islip, NY

1/5 CMS rating

OwnershipVoluntary non-profit - Church

CMS Certification Number330286

Location1000 Montauk HighwayWest Islip, NY 11795 · Suffolk County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 11795 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$154.28 typical visit price

range $67.40 – $203.53

Typical copayment $38.57 (range $16.85 – $50.88)

Most-billed visit code 99204

Established Patient

$117.62 typical visit price

range $21.66 – $164.45

Typical copayment $29.40 (range $5.41 – $41.11)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Referred Medical Equipment & Supplies CMS DME claims

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Patient lift, hydraulic or mechanical, includes any seat, sling, strap(s) or pad(s) E0630

DME-Other DME · category DE000N

1 supplier12 claims12 services$35.51 avg. paid by Medicare

Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 20

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

MRS. KRISTY SELVAGGI RPAC

Physician Assistant

1000 MONTAUK HIGHWAY, GOOD SAMARITAN HOSPITAL
WEST ISLIP, NY 11795

Suffolk County (631) 376-4444

GOOD SAMARITAN HOSPITAL

Clinic/Center (Rehabilitation, Comprehensive Outpatient Rehabilitation Facility (CORF))