Clarence Stewart Darby, PA PHD
Medical Physician Assistant · Columbia, SC
Clarence Stewart Darby, PA PHD is a medical physician assistant with a practice address in Columbia, South Carolina, and NPI 1073535605, issued on Jul 24, 2006. Check the license (South Carolina 440, as entered in NPPES) with the South Carolina board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Clarence Stewart Darby
- Credential
- PA PHD
- Primary taxonomy
- Medical Physician Assistant 363AM0700X
- License number
- 440 SC
Self-reported in NPPES; status is on the state search - Practice location
- 140 Wildewood Park Dr Ste 107, Columbia, SC 29223
- Phone
- (803) 722-4988
- Enumerated
- Jul 24, 2006
- Record last updated
- Aug 7, 2023
- Fax
- (803) 656-8135
- Entity
- Type 1 · individual
8 nearest medical physician assistant records → All 493 in South Carolina → Look up another NPI →
Verify Clarence Stewart Darby in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich South Carolina board licenses this profession
Search for license 440Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.1 times the Medicare Part D claims of the average medical physician assistant in 2024
3,610 Medicare Part D claims for 90 beneficiaries, against an average of 1,148 among the 23,801 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims.
Most prescribed
- Atorvastatin Calcium218 claims
- Amlodipine Besylate132 claims
- Omeprazole128 claims
- Levothyroxine Sodium106 claims
- Olanzapine91 claims
- Pravastatin Sodium91 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Clarence Stewart Darby among 493 medical physician assistant records in South Carolina
Clarence Stewart Darby, PA PHD 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 2006, is newer than 4% of them.
- NPI issued2006 · 4% of these records are older, 75% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileNo · 57% of these records are
- Record last updated2023 · 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
- Robert Christensen, PA-CColumbia, SC 292231417993726
- Jeniece Gulley, PA-CColumbia, SC 292231316251317
- Tamenia Bluford, P.A.Columbia, SC 292291467526418
- Amy Cook, PAColumbia, SC 292291770066110
- Jessica Hall, PA-CColumbia, SC 292291386084655
- Prima Ray, PA-CColumbia, SC 292291083270912
- Whitney Buckland, PA-CColumbia, SC 292121962828194
- Lily ChozickColumbia, SC 292121528877826
Common questions
What is Clarence Stewart Darby, PA PHD's NPI number?
Clarence Stewart Darby, PA PHD's National Provider Identifier (NPI) is 1073535605, issued on Jul 24, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Clarence Stewart Darby, PA PHD located?
The NPPES record lists a practice address at 140 Wildewood Park Dr Ste 107, Columbia, SC, 29223. Phone: (803) 722-4988. Providers update this record themselves, so call before visiting.
How can I verify Clarence Stewart Darby, PA PHD's license?
NPPES lists South Carolina license number 440, as entered by the provider. Search the South Carolina board that licenses this profession; the NPPES record confirms identity only.
How much does Clarence Stewart Darby, PA PHD prescribe under Medicare Part D?
In 2024, Clarence Stewart Darby, PA PHD had 3,610 Medicare Part D claims for 90 beneficiaries; the average among medical physician assistant prescribers was 1,148. Part D covers Medicare prescriptions only.
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.