Mary Elizabeth Poston, M.D.
Internal Medicine Physician · Columbia, SC
Mary Elizabeth Poston, M.D. is an internal medicine physician with a practice address in Columbia, South Carolina, and NPI 1497722367, issued on Mar 1, 2006. Check the license (South Carolina 21863, as entered in NPPES) on the South Carolina Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Mary Elizabeth Poston
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 21863 SC
Self-reported in NPPES; status is on the state search - Practice location
- 1801 Sunset Dr, Columbia, SC 29203
- Phone
- (803) 540-5444
- Enumerated
- Mar 1, 2006
- Record last updated
- Jul 13, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (803) 933-3042
- Medicaid ID
- 218632 SC
- Medicare enrollment
- Enrolled (PECOS I20040709000780); accepts Medicare assignment
- Medical or professional school
- Medical University Of South Carolina College Of Medicine, 1999
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 1,881 in South Carolina → Look up another NPI →
Also registered at 1801 Sunset Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Erica AndersStudent in an Organized Health Care Education/Training Program1992509046
- David AntonieInternal Medicine Physician1699525923
- Farzana Badrun, M.D.Internal Medicine Physician1952500563
- Joseph Bailey, MDInternal Medicine Physician1306696638
- Keith Barron, MDInternal Medicine Physician1093001497
Verify Mary Elizabeth Poston in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersSouth Carolina Board of Medical Examiners
Search for license 21863Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
58% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,333 Medicare Part D claims for 239 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 33 claims were for opioids.
Most prescribed
- Atorvastatin Calcium79 claims
- Amlodipine Besylate75 claims
- Metoprolol Succinate45 claims
- Omeprazole44 claims
- Rosuvastatin Calcium33 claims
- Gabapentin27 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.
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).
Mary Elizabeth Poston among 1,881 internal medicine physician records in South Carolina
Mary Elizabeth Poston, M.D. 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 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 58% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated1999 · median 2006 among the 1,119 with a school on file
- Record last updated2020 · 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 Mary Elizabeth Poston, M.D.'s NPI number?
Mary Elizabeth Poston, M.D.'s National Provider Identifier (NPI) is 1497722367, issued on Mar 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mary Elizabeth Poston, M.D. located?
The NPPES record lists a practice address at 1801 Sunset Dr, Columbia, SC, 29203. Phone: (803) 540-5444. Providers update this record themselves, so call before visiting.
How can I verify Mary Elizabeth Poston, M.D.'s license?
NPPES lists South Carolina license number 21863, 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 Mary Elizabeth Poston, M.D. prescribe under Medicare Part D?
In 2024, Mary Elizabeth Poston, M.D. had 1,333 Medicare Part D claims for 239 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Mary Elizabeth Poston, M.D.'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.