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DR. KAREEM EL-TAYEB MD
NPI 1245817899
Anesthesiology in Cambridge, MA

Active since March 28, 2021PECOS EnrolledAccepts Medicare Assignment
1493 CAMBRIDGE ST, CAMBRIDGE, MA 02139(617) 665-1000 Get Directions Write a Review

NPPES record last updated: June 24, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jul 11, 2025, Mar 28, 2021 (2 updates tracked since 2021).

About Dr. Kareem El-tayeb Md NPPES

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

DR. KAREEM EL-TAYEB MD (NPI 1245817899) is an individual anesthesiology provider in Cambridge, Massachusetts, licensed in Massachusetts (1020908) and active in the NPI registry since March 2021. He is enrolled in Medicare PECOS, is affiliated with Cambridge Health Alliance, and maintains a secondary practice location in Boston.

NPPES Registry Identity

NPI1245817899
Entity TypeIndividualMale
Primary Taxonomy207L00000X
Provider Legal NameDR. KAREEM EL-TAYEBCredential: MD
Location Address1493 CAMBRIDGE STCambridge, MA 02139-1099
Mailing Address38 Lawrence St Apt 4Boston, MA 02116-6053 · (619) 397-8155
Phone(617) 665-1000
Sole ProprietorYes
Medical School CMSTufts University School Of MedicineGraduated 2021
Enumeration DateMarch 28, 2021
Last NPPES UpdateJune 24, 20262 updates tracked since enumeration
NPPES CertifiedJune 24, 2026
✔ NPI 1245817899 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians
Taxonomy Code207L00000X
License✔ Licensed in MA · 1020908
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.
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
1493 CAMBRIDGE ST, Cambridge, MA 02139
Open in Google Maps ↗

Secondary Practice Location 1

Location 175 Francis StBoston, MA 02115-6110 · Phone (617) 732-4840

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. Kareem El-tayeb Md 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 ID2264947092
PECOS Enrollment IDI20250711002058
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

2

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

Gbaa Holdings, PLLC
18 mi
Anesthesiology
45A DISCOVERY WAY
Acton, MA 01720
  • Reassigned Medicare billing, Massachusetts enrollment
  • 125 clinicians in this Medicare group
NPI 1790299592 (978) 429-2000
Lawrence Anesthesia Services, LLC
23 mi
Anesthesiology
1 GENERAL STREET
Lawrence, MA 01842
  • Reassigned Medicare billing, Massachusetts enrollment
  • 231 clinicians in this Medicare group
NPI 1467699918 (948) 683-4000

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

Hospital Affiliations CMS Care Compare

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

Cambridge Health Alliance

Acute Care Hospitals · Cambridge, MA
3/5 CMS rating
OwnershipGovernment - Local
CMS Certification Number220011
Location1493 Cambridge StreetCambridge, MA 02138 · Middlesex County
Emergency services Birthing friendly

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.

ELIZABETH BLACK-SUCHY CCC-SLP
Speech-Language Pathologist
1493 CAMBRIDGE ST
CAMBRIDGE, MA 02139
Middlesex County (617) 591-6767
ZACHARY OLIFF DO
Emergency Medicine
1493 CAMBRIDGE ST
CAMBRIDGE, MA 02139
Middlesex County (617) 665-1000
JACOB DYLAN WOLFE LICSW
Social Worker (Clinical)
1493 CAMBRIDGE ST
CAMBRIDGE, MA 02139
Middlesex County (617) 665-1646
SARAH-JO SANTILLI RN
Registered Nurse
1493 CAMBRIDGE ST
CAMBRIDGE, MA 02139
Middlesex County (617) 272-6455
JULIE LYNNE MERCER
Registered Nurse
1493 CAMBRIDGE ST
CAMBRIDGE, MA 02139
Middlesex County (617) 591-4212
TAIANA KATSARAS LICSW
Social Worker (Clinical)
1493 CAMBRIDGE ST
CAMBRIDGE, MA 02139
Middlesex County (617) 665-1185
ANGELA DE SILVA
Registered Nurse (Ambulatory Care)
1493 CAMBRIDGE ST
CAMBRIDGE, MA 02139
Middlesex County (617) 665-1000
RORY HAUSER
Registered Nurse (Neonatal, Low-Risk)
1493 CAMBRIDGE ST
CAMBRIDGE, MA 02139
Middlesex County (802) 595-9868

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 Kareem El-tayeb's NPI number?

The NPI number for Kareem El-tayeb is 1245817899. It was assigned to this individual provider in the NPPES registry on March 28, 2021.

Where is Kareem El-tayeb located?

Kareem El-tayeb practices at 1493 Cambridge St, Cambridge, MA 02139. The listed phone number is (617) 665-1000.

What is Kareem El-tayeb's specialty?

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

Is Kareem El-tayeb enrolled in Medicare?

Yes. Kareem El-tayeb 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 Kareem El-tayeb's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Kareem El-tayeb reassigns Medicare benefits to 2 organizations: Gbaa Holdings, PLLC (Acton, MA) and Lawrence Anesthesia Services, LLC (Lawrence, MA). 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 Kareem El-tayeb's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Kareem El-tayeb affiliated with any hospitals?

According to CMS data, Kareem El-tayeb is affiliated with Cambridge Health Alliance.

When was this NPI record last updated?

The NPPES record for Kareem El-tayeb was last updated on June 24, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 months 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.