William Neal Duffy is a Internal Medicine Physician practicing in Conshohocken, Pennsylvania. The National Provider Identifier (NPI) is #1538108055, which was assigned on June 6, 2006, and the registration record was last updated on March 18, 2026. The practitioner's main practice location is at 161 Washington St, Suite 1550, Conshohocken, PA 19428; the contact telephone number is 6102000250, and the fax number is 6102000253. The primary taxonomy of William Neal Duffy is Internal Medicine Physician (207R00000X). William Neal Duffy is licensed to practice in the state of Pennsylvania (#MD060436L).
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
| NPI | 1538108055 |
| Entity Type | Individual |
| Provider Name | DR. WILLIAM NEAL DUFFY |
| Gender | Male |
| Credential | MD |
| Practice Address |
161 Washington St Suite 1550 Conshohocken PA 19428 |
| Practice Telephone | 6102000250 |
| Practice Fax Number | 6102000253 |
| Mailing Address |
161 Washington St. Suite 1550 Conshohocken PA 19428 |
| Mailing Telephone | 6102000250 |
| Mailing Fax Number | 6102000253 |
| Certification Date | 2026-03-18 |
| Enumeration Date | 2006-06-06 |
| Last Update Date | 2026-03-18 |
| Is Sole Proprietor | N |
| PAC ID |
9537358247 Medicare Provider Enrollment and Chain/Ownership System (PECOS) Associate Control (PAC) ID |
| Full Name | WILLIAM NEAL DUFFY |
| Medical School | GEORGETOWN UNIVERSITY SCHOOL OF MEDICINE |
| Primary Specialty | INTERNAL MEDICINE |
| Address |
250 King of Prussia Rd Radnor PA 19087-1790 |
| Primary | Code | Classification | Specialization | Taxonomy Group | License Number | License State |
|---|---|---|---|---|---|---|
| Y | 207R00000X | Internal Medicine | MD060436L | PA |
| Other Identifier | Issuing State | Issuer | Identifier Type |
|---|---|---|---|
| 0016035740009 | PA | MEDICAID |
| Code | 207R00000X |
| Taxonomy | Internal Medicine Physician |
| Classification | Internal Medicine |
| Grouping | Allopathic & Osteopathic Physicians |
| Definition: A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs. |
| Notes: Source: American Board of Medical Specialties, 2007. www.abms.org [7/1/2007: added definition, added source; 7/1/2011: modified source] Additional Resources: American Board of Internal Medicine, 2007. http://www.abim.org/. American Osteopathic Board of Internal Medicine, 2007. http://www.osteopathic.org/certification Board certification for Medical Doctors (MDs) is provided by the American Board of Internal Medicine. Board certification for Doctors of Osteopathy (DOs) is provided by the American Osteopathic Board of Internal Medicine. |
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|---|---|---|---|
| June Medical Group Inc. | 1580 W El Camino Real Ste 7, Mountain View, CA 94040-2462 | Internal Medicine Physician | 2026-04-08 |
| Cape Fear Valley Health Medical Group LLC | 413 Owen Dr Ste 201, Fayetteville, NC 28304-3490 | Internal Medicine Physician | 2026-04-09 |
| Timbrook Physician Services, LLC | 1840 Amherst St, Winchester, VA 22601-2808 | Internal Medicine Physician | 2026-04-10 |
| Riya Borwankar | 4311 Easton Ave, Bethlehem, PA 18020-1431 | Internal Medicine Physician | 2026-04-08 |
| Suzete Nascimento Farias Da Guarda | 653 W 8th St # L18, Jacksonville, FL 32209-6511 | Internal Medicine Physician | 2026-04-09 |
| Mather Faculty Medical Affiliates, University Faculty Practice Corpora | 1500 Route 112 Bldg 5, Port Jefferson Station, NY 11776-8055 | Internal Medicine Physician | 2026-04-09 |
| Ochsner Clinic LLC | 150 Hall St, Luling, LA 70070-4418 | Internal Medicine Physician | 2026-04-08 |
| Iman Muhammad Tahir · Iman Tahir | 4439 State Route 159 Ste 150, Chillicothe, OH 45601-7833 | Internal Medicine Physician | 2026-04-09 |
| Lamya Alzabidi | 100 Baldwin Rd, Hempstead, NY 11550-6844 | Internal Medicine Physician | 2026-04-09 |
| Crs Wellness LLC | 3865 Red Maple Dr, Conway, AR 72034-3549 | Internal Medicine Physician | 2026-04-08 |
| Find all providers with the same taxonomy | |||
| Street Address |
161 WASHINGTON ST SUITE 1550 |
| City | CONSHOHOCKEN |
| State | PA |
| Zip Code | 19428 |
| Country | US |
| Provider Name | Address | Taxonomy | Enumeration Date |
|---|---|---|---|
| Rennie Volpe | 1950 Butler Pike Ste 418, Conshohocken, PA 19428-1202 | Professional Counselor | 2019-02-06 |
| Diane Johnston Tyson | 1950 Butler Pike Unit 124, Conshohocken, PA 19428-1202 | Mental Health Counselor | 2025-11-03 |
| Erin Andrea Evans | 613 Fayette Street, Conshohocken, PA 19428-1704 | Pharmacy Technician | 2023-05-31 |
| Margaret Brown | 101 E 8th Ave Ste 208, Conshohocken, PA 19428-1773 | Clinical Social Worker | 2019-12-27 |
| Alliance Human Services, Inc. | 625 W. Ridge Pike, Bldg B Suite 102, Conshohocken, PA 19428 | Case Management Agency | 2007-04-10 |
| Neemi Lama Sherpa LLC | 1876 Butler Pike, Conshohocken, PA 19428-1209 | Dental Clinic/Center | 2026-02-27 |
| Ocean Home Health of Pa LLC | 950 Colwell Ln Ste 2, Conshohocken, PA 19428-1132 | Durable Medical Equipment & Medical Supplies | 2006-06-30 |
| Endourished LLC | 1322 Midland Rd, Conshohocken, PA 19428-1123 | Health & Wellness Coach | 2026-04-06 |
| Kristen Tomassetti | 1322 Midland Rd, Conshohocken, PA 19428-1123 | Health & Wellness Coach | 2026-04-04 |
| Medsurant, LLC | 100 Front St, Ste 280, West Conshocken, PA 19428 | Neurology Physician | 2009-11-18 |
| Find all providers in the same zip code | |||
| Provider Name | Address | Taxonomy | Enumeration Date |
|---|---|---|---|
| Derek William Neal | 400 N Texas Ave Ste A, Webster, TX 77598-4961 | Psychiatry Physician | 2010-04-26 |
| Keira Duffy | 1033 Montvale Ridge Dr, Cary, NC 27519-1000 | Occupational Therapist | 2016-07-25 |
| Lisa Duffy | 60 Hospital Rd, Leominster, MA 01453-2205 | Registered Nurse | 2026-03-06 |
| William Luther Neal | 111 E 12th St, Ada, OK 74820-6501 | Registered Nurse | 2009-04-01 |
| William Henry Neal | 21481 N Rand Rd Fl 2, Kildeer, IL 60047-3061 | Orthopaedic Surgery Physician | 2019-04-29 |
| Iris O'Neal · Chelsea O'Neal | 3101 Telegraph Ave # 9, Berkeley, CA 94705-1984 | Specialist | 2026-03-02 |
| William Neal Coulter | 2590 Lin Do Court, Sumter, SC 29150 | Dentist | 2007-01-10 |
| William Neal Kruger | 3201 University Dr E, Suite 170, Bryan, TX 77802-3475 | General Practice Dentistry | 2008-07-01 |
| Madison Duffy | 7588 Harlan St, Arvada, CO 80003-2934 | Registered Nurse | 2025-07-14 |
| Kaylee Duffy | 575 Washington Ave, Township of Washington, NJ 07676-4339 | Occupational Therapist | 2025-07-18 |
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This dataset includes over five million health care providers who are assigned National Provider Identifier (NPI) in the National Plan and Provider Enumeration System (NPPES), developed by the Centers for Medicare & Medicaid Services (CMS). Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under Health Insurance Portability and Accountability Act (HIPAA). Each provider is registered with the NPI, full name, status, address, taxonomy, other identifiers, etc.
| Subject | Transparency and Disclosure |
| Jurisdiction | Federal |
| Data Provider | National Plan and Provider Enumeration System (NPPES), by the Centers for Medicare & Medicaid Services (CMS) |
| Source | download.cms.gov |
The National Provider Identifier (NPI) is a Health Insurance Portability and Accountability Act (HIPAA) Administrative Simplification Standard. The NPI is a unique identification number for covered health care providers and all health plans and health care clearinghouses, who must use the NPIs in the administrative and financial transactions adopted under HIPAA. The NPI is a 10-position, intelligence-free numeric identifier (10-digit number). All health care providers who are HIPAA-covered entities, whether individuals or organizations, must get an NPI. A HIPAA-covered entity is a health care provider that conducts certain transactions in electronic form, or a health care clearinghouse, or a health plan (including commercial plans, Medicare, and Medicaid). Centers for Medicare & Medicaid Services (CMS) has developed the National Plan and Provider Enumeration System (NPPES) to assign unique identifiers to health care providers. The National Provider Indentifier (NPI) has been the standard identifier for all HIPAA-covered entities (health care providers) since May 23, 2007. Small health plans were required to obtain and use an NPI by May 23, 2008. This dataset includes over five million health care providers (individuals and organizations) who are assigned NPI. The provider data elements are disclosed to the public by the Centers for Medicare & Medicaid Services (CMS) under the Freedom of Information Act (FOIA), as listed in the NPPES Data Dissemination Notice (CMS-6060-N). The NPI final rules define the following elements which required to be disclosed as determined by Department of Health & Human Services (HHS): NPI, Entity Type, Provider Name, Credential, Business Mailing Address, Business Location Address, Healthcare Provider Taxonomy Code, Other Provider Identifier, Provider Enumeration Date, NPI Deactivation Date, Provider License Number, Authorized Official Name and Contact Information. |