1. Home
  2. Directory
  3. New York
  4. West Islip
  5. Anesthesiology
  6. NPI Profile

DR. ERIK J REIERSEN M.D.
NPI 1740348531
Anesthesiology in West Islip, NY

Active since December 05, 2006PECOS Enrolled
471 MONTAUK HWY, WEST ISLIP, NY 11795(631) 849-1050(631) 849-1052 Get Directions Write a Review

NPPES record last updated: December 13, 2023. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Dr. Erik J Reiersen M.d. NPPES

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

DR. ERIK J REIERSEN M.D. (NPI 1740348531) is an individual anesthesiology provider in West Islip, New York, licensed in New York (213746-1) and active in the NPI registry since December 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1740348531
Entity TypeIndividualMale
Primary Taxonomy207L00000X
Provider Legal NameDR. ERIK J REIERSENCredential: M.D.
Location Address471 MONTAUK HWYWest Islip, NY 11795-4414
Mailing Address217 Cook StHuntington Station, NY 11746-3503 · (516) 729-4108 · Fax (631) 849-1052
Phone(631) 849-1050
Fax(631) 849-1052
Sole ProprietorNo
Enumeration DateDecember 5, 2006
Last NPPES UpdateDecember 13, 2023
NPPES CertifiedDecember 13, 2023
✔ NPI 1740348531 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians
Taxonomy Code207L00000X
License✔ Licensed in NY · 213746-1
Definition
An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk of the patient undergoing surgery and optimizes the patient's condition prior to, during and after surgery. In addition to these management responsibilities, the anesthesiologist provides medical management and consultation in pain management and critical care medicine. Anesthesiologists diagnose and treat acute, long-standing and cancer pain problems; diagnose and treat patients with critical illnesses or severe injuries; direct resuscitation in the care of patients with cardiac or respiratory emergencies, including the need for artificial ventilation; and supervise post-anesthesia recovery.
471 MONTAUK HWY, West Islip, NY 11795
Open in Google Maps ↗

Other Identifiers 3

Medicaid01962298NY
OtherER03209N10NY · Blue Cross Blue Shield
Other213746-1 1WNY · Workers Compensation

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Erik J Reiersen M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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

3

Medicare enrollment records show Erik Reiersen reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Suffolk Anesthesia Services PLLC
Same address
Anesthesiology
471 MONTAUK HWY
West Islip, NY 11795
  • Reassigned Medicare billing, New York enrollment
  • 13 clinicians in this Medicare group
NPI 1871869305 (631) 849-1050
Sri Gastroenterology PC
15 mi
Gastroenterology
901 STEWART AVE
Garden City, NY 11530
  • Reassigned Medicare billing, New York enrollment
  • 16 clinicians in this Medicare group
NPI 1356606743 (516) 222-2727
Star Suites LLC
16 mi
Ambulatory Surgical
623 STEWART AVE STE 101
Garden City, NY 11530
  • Reassigned Medicare billing, New York enrollment
  • 59 clinicians in this Medicare group
NPI 1023588266 (516) 650-3355

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 4

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.

Anesthesia for other procedure on large bowel using an endoscope 00811
Anesthesia for an endoscopic procedure on the large bowel ensures comfort and relaxation during the procedure. You'll be given medication to make you drowsy or asleep, eliminating any discomfort. The medication can be administered through a vein or inhaled.
89 services89 patients
Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope 00731
This procedure involves the use of an endoscope, a flexible tube with a light and camera, to examine your esophagus, stomach, or upper small bowel. Anesthesia ensures you are comfortable and pain-free during the procedure.
87 services87 patients
Anesthesia for exam of colon using an endoscope 00812
Anesthesia for a colon examination with an endoscope is a method used to ensure comfort during the procedure. It involves administering medication to help you relax or sleep, thus reducing discomfort as the endoscope, a thin, flexible tube, is navigated through your colon.
67 services67 patients
Anesthesia for procedure on small and large bowel using an endoscope 00813
Anesthesia for an endoscopic procedure on the small and large bowel ensures comfort and relaxation during the procedure. It involves administering medicine to help you sleep or feel drowsy. This allows the doctor to examine your bowels without causing you discomfort or pain.
33 services33 patients

Other Providers at the Same Location NPPES 3

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

DR. PETER A BOULUKOS M.D.
Anesthesiology
471 MONTAUK HWY
WEST ISLIP, NY 11795
Suffolk County (631) 849-1050
SUFFOLK ANESTHESIA SERVICES PLLC
Anesthesiology
471 MONTAUK HWY
WEST ISLIP, NY 11795
Suffolk County (631) 849-1050
ISLAND DIGESTIVE HEALTH CENTER, LLC
Clinic/Center (Ambulatory Surgical)
471 MONTAUK HWY
WEST ISLIP, NY 11795
Suffolk County (631) 376-2260

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 Erik Reiersen's NPI number?

The NPI number for Erik Reiersen is 1740348531. It was assigned to this individual provider in the NPPES registry on December 5, 2006.

Where is Erik Reiersen located?

Erik Reiersen practices at 471 Montauk Hwy, West Islip, NY 11795. The listed phone number is (631) 849-1050.

What is Erik Reiersen's specialty?

The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.

Is Erik Reiersen enrolled in Medicare?

Yes. Erik Reiersen is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Erik Reiersen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Erik Reiersen reassigns Medicare benefits to 3 organizations: Suffolk Anesthesia Services PLLC (West Islip, NY), Sri Gastroenterology PC (Garden City, NY) and Star Suites LLC (Garden City, 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 Erik Reiersen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Erik Reiersen was last updated on December 13, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.