Ronald Wayne Cassada
Internal Medicine Physician · Columbia, SC
Ronald Wayne Cassada is an internal medicine physician with a practice address in Columbia, South Carolina, and NPI 1346814894, issued on May 19, 2021. Check the license (South Carolina RWC21A, as entered in NPPES) on the South Carolina Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Ronald Wayne Cassada
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- RWC21A SC
Self-reported in NPPES; status is on the state search - Practice location
- Prisma Health Medical Group Internal Medicine Center, Columbia, SC 29203
- Phone
- (803) 434-4153
- Enumerated
- May 19, 2021
- Record last updated
- Jul 30, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (803) 434-4160
- Medicare enrollment
- Enrolled (PECOS I20240806000393); accepts Medicare assignment
- Medical or professional school
- University Of South Carolina School Of Medicine, 2021
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 1,881 in South Carolina → Look up another NPI →
Also registered at Prisma Health Medical Group Internal Medicine Center
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Ronald Wayne Cassada in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersSouth Carolina Board of Medical Examiners
Search for license RWC21ACheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
87% fewer Medicare Part D claims than the average internal medicine physician in 2024
418 Medicare Part D claims for 120 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium43 claims
- Carvedilol20 claims
- Lisinopril18 claims
- Amlodipine Besylate16 claims
- Trulicity16 claims
- Lantus Solostar14 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.
Bills Medicare through one group practice
- Apogee Medical Group South CarolinaColumbia, SC
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ronald Wayne Cassada among 1,881 internal medicine physician records in South Carolina
Ronald Wayne Cassada is one of 1,881 internal medicine physician records with a practice address in South Carolina. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 78% of them.
- NPI issued2021 · 78% of these records are older, 18% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2021 · median 2006 among the 1,119 with a school on file
- Record last updated2021 · 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 207R00000X and a South Carolina practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
269 internal medicine physician records list a practice address in Columbia
They are 269 of the 11,200 NPPES records with a practice address in Columbia, and 1,881 internal medicine physician records in South Carolina.
All 1,881 in South Carolina → Every provider in Columbia → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Gary Bell, M.D.Columbia, SC 292031689640922
- Anthony Elkins, MDColumbia, SC 292031629045505
- James Gasque, MDColumbia, SC 292031255326096
- Brown McCallum, M.D.Columbia, SC 292031124090352
- Kay McFarland, M.D.Columbia, SC 292031205803020
- Fanwei Meng, MDColumbia, SC 292031780650937
- H Murdaugh, M.D.Columbia, SC 292031083680946
- Mieke Perez, MDColumbia, SC 292031881670305
Common questions
What is Ronald Wayne Cassada's NPI number?
Ronald Wayne Cassada's National Provider Identifier (NPI) is 1346814894, issued on May 19, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Ronald Wayne Cassada located?
The NPPES record lists a practice address at Prisma Health Medical Group Internal Medicine Center, Columbia, SC, 29203. Phone: (803) 434-4153. Providers update this record themselves, so call before visiting.
How can I verify Ronald Wayne Cassada's license?
NPPES lists South Carolina license number RWC21A, as entered by the provider. Search the South Carolina Board of Medical Examiners at https://verify.llronline.com/LicLookup/Med/Med.aspx?div=22. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Ronald Wayne Cassada prescribe under Medicare Part D?
In 2024, Ronald Wayne Cassada had 418 Medicare Part D claims for 120 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.