Katherine Duffy Grinton, P.A.-C
Medical Physician Assistant · Columbia, SC
Katherine Duffy Grinton, P.A.-C is a medical physician assistant with a practice address in Columbia, South Carolina, and NPI 1831347343, issued on Sep 9, 2008. Check the license with the South Carolina board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Katherine Duffy Grinton
- Credential
- P.A.-C
- Primary taxonomy
- Medical Physician Assistant 363AM0700X
- Practice location
- 14 Medical Park Drive, Columbia, SC 29203
- Phone
- (803) 434-8721
- Enumerated
- Sep 9, 2008
- Record last updated
- Apr 28, 2017 (not updated in 9 years: call before relying on the address or phone)
- Fax
- (803) 434-3955
- Medicare enrollment
- Enrolled (PECOS I20110804000454); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest medical physician assistant records → All 493 in South Carolina → Look up another NPI →
Also registered at 14 Medical Park Drive
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Tyler Cameron, DOEmergency Medicine Physician1912849480
- Peter Carnohan, M.D.Hospitalist Physician1487659660
- John ClendeninStudent in an Organized Health Care Education/Training Program1639011844
- Joseph Daus, MDEmergency Medicine Physician1902748304
- William Echols, DOEmergency Medicine Physician1205530110
Verify Katherine Duffy Grinton in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich South Carolina board licenses this professionCheck 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 MIPS final score for 2023 (Medicare payment program): 99.3 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Prisma Health Medical Group-MidlandsColumbia, SC
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Katherine Duffy Grinton among 493 medical physician assistant records in South Carolina
Katherine Duffy Grinton, P.A.-C is one of 493 medical physician assistant records with a practice address in South Carolina. 80% 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 32% of them.
- NPI issued2008 · 32% of these records are older, 62% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated2008 · median 2014 among the 282 with a school on file
- Record last updated2017 · 47% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363AM0700X and a South Carolina practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Medical Physician Assistant providers in South Carolina
There are 493 medical physician assistant records in South Carolina.
All 493 in South Carolina → Every provider in Columbia → Medical Physician Assistant nationwide →
The 8 medical physician assistant records with the nearest ZIP codes
- Megan Ackerson, PA-CColumbia, SC 292031942614607
- Gregory Chambers, PA-CColumbia, SC 292031861625683
- Tonna Coleman, P.A.Columbia, SC 292031720367170
- Douglas Dow, PA-CColumbia, SC 292031760636708
- Mykenzi Gibbs, PA-CColumbia, SC 292031053733394
- Susan Henderson, PA-CColumbia, SC 292031184753063
- Ashley Kinney, PA-CColumbia, SC 292031538417977
- Emily McKinney, PA-CColumbia, SC 292031730671355
Common questions
What is Katherine Duffy Grinton, P.A.-C's NPI number?
Katherine Duffy Grinton, P.A.-C's National Provider Identifier (NPI) is 1831347343, issued on Sep 9, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Katherine Duffy Grinton, P.A.-C located?
The NPPES record lists a practice address at 14 Medical Park Drive, Columbia, SC, 29203. Phone: (803) 434-8721. Providers update this record themselves, so call before visiting.
How can I verify Katherine Duffy Grinton, P.A.-C's license?
Search the South Carolina board that licenses this profession; the NPPES record confirms identity only.
What is Katherine Duffy Grinton, P.A.-C's MIPS final score?
The 2023 MIPS final score is 99.3 of 100. 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.