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WILLIAM BEGG M.D.
NPI 1710991393
Emergency Medicine - Emergency Medical Services in Danbury, CT

Active since July 28, 2006PECOS Enrolled
24 HOSPITAL AVE, DANBURY, CT 06810(203) 797-7100 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About William Begg M.d. NPPES

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

WILLIAM BEGG M.D. (NPI 1710991393) is an individual emergency medical services provider in Danbury, Connecticut, licensed in Connecticut (032922) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1710991393
Entity TypeIndividualMale
Primary Taxonomy207PE0004X
Provider Legal NameWILLIAM BEGGCredential: M.D.
Location Address24 HOSPITAL AVEDanbury, CT 06810-6099
Mailing Address24 Hospital AveDanbury, CT 06810-6099 · (203) 797-7100
Phone(203) 797-7100
Sole ProprietorNo
Enumeration DateJuly 28, 2006
Last NPPES UpdateJuly 8, 2007
✔ NPI 1710991393 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency Medicine · Emergency Medical ServicesAllopathic & Osteopathic Physicians
Taxonomy Code207PE0004X
License✔ Licensed in CT · 032922
Definition
An emergency medicine physician who specializes in non-hospital based emergency medical services (e.g., disaster site, accident scene, transport vehicle, etc.) to provide pre-hospital assessment, treatment, and transport patients.
24 HOSPITAL AVE, Danbury, CT 06810
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Other Identifiers 1

Medicare UPINF26598CT

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

William Begg 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

2

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

Danbury Hospital
Same address
End-Stage Renal Disease (ESRD) Treatment
24 HOSPITAL AVE, NELSON GELFMAN, MD., DIALYSIS UNIT
Danbury, CT 06810
  • Reassigned Medicare billing, Connecticut enrollment
  • 155 clinicians in this Medicare group
NPI 1184649667 (203) 797-7382
Norwalk Hospital Association
20 mi
General Acute Care Hospital
34 MAPLE ST
Norwalk, CT 06850
  • Reassigned Medicare billing, Connecticut enrollment
  • 113 clinicians in this Medicare group
NPI 1427041581 (203) 852-2216

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 06810 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
$93.86 typical visit price
range $60.82 – $183.10
Typical copayment $23.46 (range $15.20 – $45.77)
Most-billed visit code 99203
Established Patient
$106.68 typical visit price
range $19.76 – $149.26
Typical copayment $26.67 (range $4.94 – $37.31)
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.

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.

DR. ANDREW CALIGIURI D.O.
Emergency Medicine
24 HOSPITAL AVE
DANBURY, CT 06810
Western Connecticut Planning Region (203) 739-7000
GARRETT JAFFE
Nurse Anesthetist, Certified Registered
24 HOSPITAL AVE
DANBURY, CT 06810
Western Connecticut Planning Region (203) 739-7118
DR. SUHANKI RAJAPAKSA M.D
Student in an Organized Health Care Education/Training Program
24 HOSPITAL AVE
DANBURY, CT 06810
Western Connecticut Planning Region (203) 739-4973
MR. PETER X ZHANG PA-C
Physician Assistant (Surgical)
24 HOSPITAL AVE
DANBURY, CT 06810
Western Connecticut Planning Region (203) 739-7000
CHRISTIE ALLEN
Nurse Practitioner (Acute Care)
24 HOSPITAL AVE
DANBURY, CT 06810
Western Connecticut Planning Region (203) 739-7000
DANBURY OFFICE OF PHYSICIAN SERVICES, P.C.
Anesthesiology
24 HOSPITAL AVE
DANBURY, CT 06810
Western Connecticut Planning Region (203) 797-7442
REBECCA E. PIKE M.D.
Internal Medicine
24 HOSPITAL AVE
DANBURY, CT 06810
Western Connecticut Planning Region (203) 739-7000
JACOB BARTEL LOTSTEIN M.D.
Emergency Medicine
24 HOSPITAL AVE
DANBURY, CT 06810
Western Connecticut Planning Region (203) 739-7100

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 William Begg's NPI number?

The NPI number for William Begg is 1710991393. It was assigned to this individual provider in the NPPES registry on July 28, 2006.

Where is William Begg located?

William Begg practices at 24 Hospital Ave, Danbury, CT 06810. The listed phone number is (203) 797-7100.

What is William Begg's specialty?

The primary specialty registered for this NPI is Emergency Medicine, specializing in Emergency Medical Services, with taxonomy code 207PE0004X.

Is William Begg enrolled in Medicare?

Yes. William Begg is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for William Begg's services?

According to the CMS Revalidation Reassignment List (October 2026 release), William Begg reassigns Medicare benefits to 2 organizations: Danbury Hospital (Danbury, CT) and Norwalk Hospital Association (Norwalk, CT). 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 William Begg'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 William Begg was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.