Patrick Duffy, PA
Patrick Duffy, PA is a Physician Assistant in Rehoboth Beach, DE, registered under NPI 1780748368.
Getting there
The practice address on file is 18947 JOHN J WILLIAMS HWY UNIT 201, Rehoboth Beach, DE 19971. We have not yet mapped what surrounds this office — parking, transit, and nearby pharmacies are added as our data collection reaches each location.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| C50000546 | DE | Physician Assistant primary |
This provider holds licence C50000546 issued in DE. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
- Status
- Approved
- Provider type
- Practitioner - Physician Assistant
- PAC ID
- 3072612472
Enrolled in Medicare 2 times, across 2 states:
| State | Enrollment ID | Provider type |
|---|---|---|
| Delaware | I20070626000623 | Practitioner - Physician Assistant |
| Florida | I20121203000155 | Practitioner - Physician Assistant |
Medicare enrolment is recorded as approved under the provider type Practitioner - Physician Assistant. There are 2 separate enrolment records across 2 states (DE, FL). Multiple enrolments usually mean the provider bills Medicare from more than one practice location, or has kept an earlier enrolment after moving. Each record carries its own enrolment ID, listed above. Being enrolled means the provider can bill Medicare; it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
What Physician Assistant covers
A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician. NUCC Health Care Provider Taxonomy, code 363A00000X
The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.
Full NPPES record
An NPI-1 identifies a single person. It stays with the clinician for life, even if they move practice or change state, which is why the address on file can lag behind where they actually work today.
| NPI | 1780748368 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Dec 20, 2006 |
| Last updated | Oct 26, 2023 |
| Status | Active |
| Sole proprietor | No |
| Credential | PA |
| Practice address |
18947 JOHN J WILLIAMS HWY UNIT 201 Rehoboth Beach, DE 19971 (302) 645-4801 Fax (302) 645-7183 |
| Mailing address |
1515 SAVANNAH RD Lewes, DE 19958 |
| Other identifiers |
C50000546
· Other (DE) |
Number check
How the check works, step by step
Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.
| Digit | 8 | 0 | 8 | 4 | 0 | 1 | 7 | 8 | 0 | 7 | 4 | 8 | 3 | 6 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 7 | 7 | 0 | 5 | 4 | 7 | 3 | 3 |
Sum = 62 · next multiple of 10 = 70 · check digit = 8 · actual last digit = 8
A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.