William N Duffy, MD - Medicare Internal Medicine in Berwyn, PA

William N Duffy, MD is a medicare enrolled "Internal Medicine" physician in Berwyn, Pennsylvania. He went to Georgetown University School Of Medicine and graduated in 1993 and has 31 years of diverse experience with area of expertise as Internal Medicine. He is a member of the group practice Clinical Care Associates Of The University Of Pennsylvania Health and his current practice location is 1001 Chesterbrook Blvd Fl 3, Berwyn, Pennsylvania. You can reach out to his office (for appointments etc.) via phone at (610) 576-7515.

William N Duffy is licensed to practice in Pennsylvania (license number MD060436L) and he also participates in the medicare program. He accepts medicare assignments (which means he accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and his NPI Number is 1538108055.

Contact Information

William N Duffy, MD
1001 Chesterbrook Blvd Fl 3,
Berwyn, PA 19312-3805
(610) 576-7515
(610) 576-7546

Map and Direction




Physician's Profile

Full NameWilliam N Duffy
GenderMale
SpecialityInternal Medicine
Experience31 Years
Location1001 Chesterbrook Blvd Fl 3, Berwyn, Pennsylvania
Accepts Medicare AssignmentsYes. He accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • William N Duffy attended and graduated from Georgetown University School Of Medicine in 1993
  NPI Data:
  • NPI Number: 1538108055
  • Provider Enumeration Date: 06/06/2006
  • Last Update Date: 07/21/2022
  Medicare PECOS Information:
  • PECOS PAC ID: 9537358247
  • Enrollment ID: I20110112000207

Medical Identifiers

Medical identifiers for William N Duffy such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1538108055NPI-NPPES
0016035740009MedicaidPA

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine MD060436L (Pennsylvania)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Penn Medicine Home HealthBala cynwyd, PAHome health agency
Hospital Of Univ Of PennsylvaniaPhiladelphia, PAHospital
Chester County HospitalWest chester, PAHospital
Pennsylvania HospitalPhiladelphia, PAHospital
Penn Presbyterian Medical CenterPhiladelphia, PAHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Clinical Care Associates Of The University Of Pennsylvania Health4688588866507

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. William N Duffy allows following entities to bill medicare on his behalf.
Entity NameClinical Care Associates Of The University Of Pennsylvania Health
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1972682995
PECOS PAC ID: 4688588866
Enrollment ID: O20031113000301
Entity NameUniversity Of Penn-medical Group
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1053447151
PECOS PAC ID: 6204730955
Enrollment ID: O20150304001436

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. William N Duffy is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
William N Duffy, MD
1001 Chesterbrook Blvd, 3rd Fl,
Berwyn, PA 19312

Ph: (610) 576-7515
William N Duffy, MD
1001 Chesterbrook Blvd Fl 3,
Berwyn, PA 19312-3805

Ph: (610) 576-7515

Reviews and Comments


Internal Medicine Doctors in Berwyn, PA

Dr. Hiral Patel, DO
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 1001 Chesterbrook Blvd Fl 3, Berwyn, PA 19312
Phone: 610-576-7600    Fax: 610-576-7705
Rachana Mundada, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 1001 Chesterbrook Blvd Fl 3, Berwyn, PA 19312
Phone: 610-576-7600    Fax: 610-576-7705
Jana Havranova Abraham, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 1001 Chesterbrook Blvd, 3rd Floor East, Berwyn, PA 19312
Phone: 610-576-7600    Fax: 610-576-7705
Humberto Guerra-garcia, M.D.
Internal Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 2055 White Horse Rd, Berwyn, PA 19312
Phone: 484-620-2744    
Siva Ramachandran, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 1001 Chesterbrook Blvd Fl 3, Berwyn, PA 19312
Phone: 610-576-7600    
Dr. Amitha Padmanabhuni, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 1001 Chesterbrook Blvd, Berwyn, PA 19312
Phone: 610-576-7800    
Dr. Daniel Eric Everitt, M.D.
Internal Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 1061 Waterloo Rd, Berwyn, PA 19312
Phone: 484-919-0017    Fax: 609-730-4326

Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

Our Data: Information on www.medicarelist.com is built using data sources published by Centers for Medicare & Medicaid Services (CMS) under Freedom of Information Act (FOIA). The information disclosed on the NPI Registry are FOIA-disclosable and are required to be disclosed under the FOIA and the eFOIA amendments to the FOIA. There is no way to 'opt out' or 'suppress' the NPPES record data for health care providers with active NPIs.