Joseph Cassidy, PA
Physician Assistant · Wilmington, DE
Joseph Cassidy, PA is a physician assistant with a practice address in Wilmington, Delaware, and NPI 1558371146, issued on Aug 8, 2006. Check the license (Delaware C5-0000410, as entered in NPPES) with the Delaware board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Joseph Cassidy
- Credential
- PA
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- C5-0000410 DE
Self-reported in NPPES; status is on the state search - Practice location
- 1941 Limestone Road, Wilmington, DE 19808
- Phone
- (302) 633-3555
- Enumerated
- Aug 8, 2006
- Record last updated
- Sep 20, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (302) 633-3559
- Medicaid ID
- 0005603463 DE
- Medicare enrollment
- Enrolled (PECOS I20240313002723); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 695 in Delaware → Look up another NPI →
Also registered at 1941 Limestone Road
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Joseph Cassidy in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Delaware board licenses this profession
Search for license C5-0000410Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The practice group's MIPS final score for 2023 (Medicare payment program): 70.7 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $156.42
6 payments; by number, the most common kind was food and beverage; the largest payer was Abbott Laboratories. The 64,719 providers of this specialty with any payment received $841.65 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Regional Orthopaedic Associates PAChadds Ford, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Joseph Cassidy among 695 physician assistant records in Delaware
Joseph Cassidy, PA is one of 695 physician assistant records with a practice address in Delaware. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 3% of them.
- NPI issued2006 · 3% of these records are older, 85% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2003 · median 2019 among the 462 with a school on file
- Record last updated2019 · 34% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a Delaware practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
138 physician assistant records list a practice address in Wilmington
They are 138 of the 6,291 NPPES records with a practice address in Wilmington, and 695 physician assistant records in Delaware.
All 695 in Delaware → Every provider in Wilmington → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Robert Biddle, PAWilmington, DE 198081467462051
- Crystal Dimauro, PAWilmington, DE 198081750832812
- George Duffield, PA-CWilmington, DE 198081689101917
- Catherine Frescoln, PAWilmington, DE 198081629280375
- Daniel Maistre, PA-CWilmington, DE 198081770949026
- Thomas Merring, P.A.Wilmington, DE 198081447507421
- Chioma Njoku, PHYSICIAN ASSISTANTWilmington, DE 198081831483783
- Jane Ramsay, PA-CWilmington, DE 198081487030334
Common questions
What is Joseph Cassidy, PA's NPI number?
Joseph Cassidy, PA's National Provider Identifier (NPI) is 1558371146, issued on Aug 8, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Joseph Cassidy, PA located?
The NPPES record lists a practice address at 1941 Limestone Road, Wilmington, DE, 19808. Phone: (302) 633-3555. Providers update this record themselves, so call before visiting.
How can I verify Joseph Cassidy, PA's license?
NPPES lists Delaware license number C5-0000410, as entered by the provider. Search the Delaware board that licenses this profession; the NPPES record confirms identity only.
What is Joseph Cassidy, PA's MIPS final score?
The 2023 MIPS final score is 70.7 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.