DR. SEBASTIAN R MCWILLIAMS MD
NPI 1467740050
Radiology - Diagnostic Radiology in Boston, MA

Q: What is Sebastian Mcwilliams's NPI number?

The NPI number for Sebastian Mcwilliams is 1467740050. It was assigned to this individual provider in the NPPES registry on July 15, 2011.

Q: What is Sebastian Mcwilliams's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.

Active since July 15, 2011PECOS Enrolled

MASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT ST, BLAKE SUB BASEMENT RM 0029-A, BOSTON, MA 02114(617) 724-5246 Get Directions Write a Review

NPPES record last updated: August 2, 2017. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Aug 2, 2017, Mar 2, 2016 (2 updates tracked since 2016).

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About Dr. Sebastian R Mcwilliams Md NPPES

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

DR. SEBASTIAN R MCWILLIAMS MD (NPI 1467740050) is an individual diagnostic radiology provider in Boston, Massachusetts, licensed in Massachusetts (272098) and active in the NPI registry since July 2011. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1467740050

Entity TypeIndividualMale

Primary Taxonomy2085R0202X

Provider Legal NameDR. SEBASTIAN R MCWILLIAMSCredential: MD

Location AddressMASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT ST, BLAKE SUB BASEMENT RM 0029-ABoston, MA 02114

Mailing AddressMassachusetts General Hospital, 55 Fruit St, Blake Sub Basement Rm 0029-aBoston, MA 02114

Phone(617) 724-5246

Sole ProprietorNo

Enumeration DateJuly 15, 2011

Last NPPES UpdateAugust 2, 20172 updates tracked since enumeration

✔ NPI 1467740050 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyRadiology · Diagnostic RadiologyAllopathic & Osteopathic Physicians

Taxonomy Code2085R0202X

Licenses✔ Licensed in MA · 272098✔ Licensed in MO · 2016006387

Definition

A radiologist who utilizes x-ray, radionuclides, ultrasound and electromagnetic radiation to diagnose and treat disease.

MASSACHUSETTS GENERAL HOSPITAL, Boston, MA 02114

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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Sebastian R Mcwilliams Md 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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 02114 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

$97.64 typical visit price

range $63.72 – $189.86

Typical copayment $24.41 (range $15.93 – $47.46)

Most-billed visit code 99203

Established Patient

$78.84 typical visit price

range $21.07 – $155.29

Typical copayment $19.71 (range $5.26 – $38.82)

Most-billed visit code 99213

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

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.

KAITLYN MY-TU LAM MBBS

Internal Medicine (Cardiovascular Disease)

MASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT STREET
BOSTON, MA 02114

Suffolk County (617) 724-7738

ALAKA RAY M.D.

Internal Medicine

MASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT STREET
BOSTON, MA 02114

Suffolk County (617) 726-2066

MEGHAN E SISE M.D.

Internal Medicine (Nephrology)

MASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT STREET
BOSTON, MA 02114

Suffolk County (617) 726-2862

HUGH G AUCHINCLOSS M.D.

Thoracic Surgery (Cardiothoracic Vascular Surgery)

MASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT STREET
BOSTON, MA 02114

Suffolk County (617) 726-2000

ANGELA M. JACQUES MD

Pediatrics

MASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT ST.
BOSTON, MA 02114

Suffolk County (617) 726-2066

NICOLE J LOOK-HONG MD, MSC

Surgery (Surgical Oncology)

MASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT ST.
BOSTON, MA 02114

Suffolk County (617) 724-3868

CORINNA M ELLIOTT MA

Student in an Organized Health Care Education/Training Program

MASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT STREET
BOSTON, MA 02114

Suffolk County (617) 724-5600

KIRAN J AGARWAL-HARDING MD

Orthopaedic Surgery

MASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT ST.
BOSTON, MA 02114

Suffolk County (617) 726-2942

ADELINE GOSS MD

Internal Medicine

MASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT ST.
BOSTON, MA 02114

Suffolk County (617) 643-0596

KENDRICK M SHAW MD, PHD

Anesthesiology

MASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT ST.
BOSTON, MA 02114

Suffolk County (617) 726-3030

JOSHUA M SIEWERT MD,MBA

Internal Medicine

MASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT ST.
BOSTON, MA 02114

Suffolk County (617) 643-0596

CRISTINA CUSIN MD

Psychiatry & Neurology (Psychiatry)

MASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT STREET
BOSTON, MA 02114

Suffolk County (617) 726-2066

PARSIA A VAGEFI MD

Surgery

MASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT STREET
BOSTON, MA 02114

Suffolk County (617) 726-2066

ANNE HODGES LIGHT MD

Pediatrics

MASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT STREET
BOSTON, MA 02114

Suffolk County (617) 726-2066

DR. HILLARY R. KELLY MD

Radiology (Diagnostic Radiology)

MASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT STREET, GRB-273A
BOSTON, MA 02114

Suffolk County (617) 726-8320

GARRETT M CHINN M.D.

Internal Medicine

MASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT STREET
BOSTON, MA 02114

Suffolk County (617) 726-2862

RUTH A DELANEY MD

Orthopaedic Surgery

MASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT STREET
BOSTON, MA 02114

Suffolk County (617) 726-2800

KELLY E IRWIN M.D.

Psychiatry & Neurology (Psychiatry)

MASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT STREET
BOSTON, MA 02114

Suffolk County (617) 726-2000

SHIRI B FEINGOLD M.D.

Internal Medicine

MASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT ST.
BOSTON, MA 02114

Suffolk County (617) 726-2865

NILAY K PATEL MD

Internal Medicine

MASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT ST.
BOSTON, MA 02114

Suffolk County (617) 726-2865

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 Sebastian Mcwilliams's NPI number?

The NPI number for Sebastian Mcwilliams is 1467740050. It was assigned to this individual provider in the NPPES registry on July 15, 2011.

Where is Sebastian Mcwilliams located?

Sebastian Mcwilliams practices at Massachusetts General Hospital 55 Fruit St, Blake Sub Basement Rm 0029-A, Boston, MA 02114. The listed phone number is (617) 724-5246.

What is Sebastian Mcwilliams's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.

Is Sebastian Mcwilliams enrolled in Medicare?

Yes. Sebastian Mcwilliams is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Sebastian Mcwilliams was last updated on August 2, 2017. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.