Seth Gregory Mahan, P.A.-C
Orthopaedic Surgery Physician · Wilmington, DE
Seth Gregory Mahan, P.A.-C is an orthopaedic surgery physician with a practice address in Wilmington, Delaware, and NPI 1225282585, issued on Nov 12, 2008. Check the license (Delaware C5-0000644, as entered in NPPES) on the Delaware Board of Medical Licensure and Discipline; the Medicare figures below come from public CMS files.
- Name
- Seth Gregory Mahan
- Credential
- P.A.-C
- Primary taxonomy
- Orthopaedic Surgery Physician 207X00000X
- License number
- C5-0000644 DE
Self-reported in NPPES; status is on the state search - Practice location
- 1941 Limestone RD, Wilmington, DE 19808
- Phone
- (302) 442-6365
- Enumerated
- Nov 12, 2008
- Record last updated
- Mar 17, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (302) 633-3350
- Medicare enrollment
- Enrolled (PECOS I20101011000420); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest orthopaedic surgery physician records → All 76 in Delaware → Look up another NPI →
Also registered at 1941 Limestone RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Elizabeth AdamsPhysician Assistant1598610941
- Linda Bartolo, APRNGerontology Nurse Practitioner1891868527
- Joseph Belgrade, M.D.Surgery Physician1144285701
- Richard Bonder, M.D.Dermatology Physician1932105194
- Maryann Connor, DOFamily Medicine Physician1912960428
- Michael Conway, M.D.Surgery Physician1881705309
Verify Seth Gregory Mahan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersDelaware Board of Medical Licensure and Discipline
Search for license C5-0000644Check 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): 92.1 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).
Bills Medicare through one group practice
- Reconstructive Orthopaedic Associates II LLCBensalem, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Seth Gregory Mahan among 76 orthopaedic surgery physician records in Delaware
Seth Gregory Mahan, P.A.-C is one of 76 orthopaedic surgery physician records with a practice address in Delaware. 76% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 62% of them.
- NPI issued2008 · 62% of these records are older, 30% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated2008 · median 2006 among the 52 with a school on file
- Record last updated2010 · 46% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207X00000X and a Delaware practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Orthopaedic Surgery Physician providers in Delaware
There are 76 orthopaedic surgery physician records in Delaware.
All 76 in Delaware → Every provider in Wilmington → Orthopaedic Surgery Physician nationwide →
The 8 orthopaedic surgery physician records with the nearest ZIP codes
- Damian Andrisani, MDWilmington, DE 198081689613689
- Steven Dellose, MDWilmington, DE 198081679512685
- Matthew Eichenbaum, MDWilmington, DE 198081831216746
- Brian Galinat, MDWilmington, DE 198081366481350
- Paul Kupcha, MDWilmington, DE 198081922055177
- Joseph Mesa, MDWilmington, DE 198081083660187
- Douglas Palma, MDWilmington, DE 198081215977764
- John Patterson, M.D.Wilmington, DE 198081457390957
Common questions
What is Seth Gregory Mahan, P.A.-C's NPI number?
Seth Gregory Mahan, P.A.-C's National Provider Identifier (NPI) is 1225282585, issued on Nov 12, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Seth Gregory Mahan, P.A.-C located?
The NPPES record lists a practice address at 1941 Limestone RD, Wilmington, DE, 19808. Phone: (302) 442-6365. Providers update this record themselves, so call before visiting.
How can I verify Seth Gregory Mahan, P.A.-C's license?
NPPES lists Delaware license number C5-0000644, as entered by the provider. Search the Delaware Board of Medical Licensure and Discipline at https://delpros.delaware.gov/OH_VerifyLicense. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
What is Seth Gregory Mahan, P.A.-C's MIPS final score?
The 2023 MIPS final score is 92.1 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.