WILLIAM C SIEGEL (MD) – Internal Medicine Physician, NPI 1336120757

WILLIAM C SIEGEL (MD) is a healthcare provider. based in Brockton, Massachusetts. specializing in Internal Medicine Physician. They hold the professional credentials MD. They hold a License No. 50750 (MA). The NPI Number for WILLIAM C SIEGEL (MD) is 1336120757

Main info

Male
46 Years Of Experience
Accepts Medicare Assignment
Name
WILLIAM C SIEGEL (MD)
NPI
1336120757
Phone
(508) 894-0400
Address
680 CENTRE ST
Enumeration Date
11 November 2005
Last Update Date
16 February 2021

Doctor Profile

Medical School Name
STANFORD UNIVERSITY SCHOOL OF MEDICINE
Secondary Phone
5088940400
Graduation Year
1980 (46 years ago)
PAC ID
9032156948
Group Practice PAC ID
7719876267
Professional Enrollment ID
I20050412001296
Data current as of
19 May 2026

Profile Insights

NPPES metrics only — not quality of care.

Methodology
Experience69
Completeness75
Years active:20State licenses:1Digital endpointsOther names

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Provider Addresses for WILLIAM C SIEGEL (MD)

  • Signature Healthcare Brockton Hospital, 680, Centre Street, Brockton, Plymouth County, Massachusetts, 02302, United States

    BROCKTON, MA 023023308

    Phone: (508) 894-0400

    Fax: (508) 894-0459

    Type: Mailing

  • 110, Liberty Street, Marshall Corner, Brockton, Plymouth County, Massachusetts, 02357, United States

    BROCKTON, MA 02301

    Phone: (508) 894-0400

    Fax: (508) 941-0332

    Type: Location

NPPES updates history

No NPPES updates recorded for this provider.

Prescription Activity

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Open Payments (CMS)

No Open Payments data available for this provider.

This can happen when there are no reportable CMS Open Payments records.

Medicare Enrollment & Revalidation

Source: CMS public data · Not endorsed by CMS ·

Educational use only—not medical, billing, or legal advice.

No Medicare enrollment or revalidation data available for this provider in our database.

Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS

Medicare Utilization (FFS)

Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·

Educational use only—not medical, billing, or legal advice.

Top Medicare procedures (2023) · refreshed 2026-05-27

HCPCSDescriptionServicesBeneficiariesMedicare allowed
99214Established patient office or other outpatient visit, 30-39 minutes687332$0
93000Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report307262$0
36415Insertion of needle into vein for collection of blood sample193111$0
93306Ultrasound of heart with color-depicted blood flow, rate, direction and valve function134132$0
99213Established patient office or other outpatient visit, 20-29 minutes10282$0
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Insurance plans in this area (ZIP 02302)

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Provider's Procedures

WILLIAM C SIEGEL (MD) performs procedures in Internal Medicine Physician. See the list of HCPCS codes below.
SpecialtyPractice State
HCPCS Code
Description
Service Count
Beneficiary Count
CARDIOVASCULAR DISEASE (CARDIOLOGY)MA78452Nuclear medicine study of vessels of heart using drugs or exercise multiple studies8383
CARDIOVASCULAR DISEASE (CARDIOLOGY)MA90670Pneumococcal vaccine for injection into muscle3737
CARDIOVASCULAR DISEASE (CARDIOLOGY)MA93280Evaluation, testing, and programming adjustment of permanent dual lead pacemaker system with physician analysis, review, and report2117

Group practice members

Group practice members are other physicians who share the same Group Practice PAC ID with this doctor. When doctors form a group practice and register in PECOS as a single entity, they receive a shared identification number. This table lists all providers in the same group practice.
PAC ID: 7719876267View full group profile
NameSpecialtyState
-MA
General SurgeryIL
E N D O C R I N O L O G YMI
-CA
Internal MedicineMA
-NY
O B S T E T R I C S/ G Y N E C O L O G YMA
-MA
Orthopedic SurgeryMA
-NY

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Frequently asked questions

How is WILLIAM C SIEGEL (MD) identified in CMS data?
CMS-hosted NPPES data lists WILLIAM C SIEGEL (MD) with NPI 1336120757.
Is WILLIAM C SIEGEL (MD) listed as active for patients and plans?
The listing shows WILLIAM C SIEGEL (MD) as active in the NPI system.
What is WILLIAM C SIEGEL (MD)'s primary classification?
Internal Medicine Physician is the headline specialty for WILLIAM C SIEGEL (MD) here. Clinical services aligned with this taxonomy classification.
What area does WILLIAM C SIEGEL (MD) serve?
WILLIAM C SIEGEL (MD)'s listing highlights Brockton, Massachusetts; more addresses can appear in NPPES.
How many locations tie to this NPI?
2 practice locations appear in the available data.

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