Luis Thormer Chastain, MD
Family Medicine Physician · Georgetown, SC
Luis Thormer Chastain, MD is a family medicine physician with a practice address in Georgetown, South Carolina, and NPI 1467477661, issued on Jul 12, 2006. Check the license (South Carolina 28078, as entered in NPPES) on the South Carolina Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Luis Thormer Chastain
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 28078 SC
Self-reported in NPPES; status is on the state search - Practice location
- 1075 N Fraser St, Georgetown, SC 29440
- Phone
- (843) 527-4442
- Enumerated
- Jul 12, 2006
- Record last updated
- Dec 3, 2025
- Fax
- (843) 527-4027
- Medicaid IDs
- RHC132 SC
GP1371 SC - Medicare enrollment
- Enrolled (PECOS I20080522000720); accepts Medicare assignment
- Medical or professional school
- Medical University Of South Carolina College Of Medicine, 2005
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 2,700 in South Carolina → Look up another NPI →
Also registered at 1075 N Fraser St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Henry Adkins, MDFamily Medicine Physician1578669297
- Brandy Baker, P.A.Physician Assistant1558366807
- Julia Barton Hulsey, MDFamily Medicine Physician1811490907
- Cornell Caviness, PA CFamily Medicine Physician1558413435
- Thomas Crosby, MDFamily Medicine Physician1285641175
- Alexander Duvall, MDFamily Medicine Physician1851323448
Verify Luis Thormer Chastain in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersSouth Carolina Board of Medical Examiners
Search for license 28078Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4.5 times the Medicare Part D claims of the average family medicine physician in 2024
16,040 Medicare Part D claims for 748 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 255 claims were for opioids.
Most prescribed
- Atorvastatin Calcium899 claims
- Rosuvastatin Calcium639 claims
- Amlodipine Besylate546 claims
- Pantoprazole Sodium487 claims
- Gabapentin443 claims
- Losartan Potassium426 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 practice group's MIPS final score for 2023 (Medicare payment program): 81.9 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).
Industry payments in 2024: $45.68
3 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 55,478 providers of this specialty with any payment received $902.55 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Georgetown Health GroupGeorgetown, SC
- Georgetown Physician Associates, LLCGeorgetown, SC
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Luis Thormer Chastain among 2,700 family medicine physician records in South Carolina
Luis Thormer Chastain, MD is one of 2,700 family medicine physician records with a practice address in South Carolina. 78% 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 8% of them.
- NPI issued2006 · 8% of these records are older, 53% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 61% of these records are
- Graduated2005 · median 2006 among the 1,638 with a school on file
- Record last updated2025 · 50% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a South Carolina practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
16 family medicine physician records list a practice address in Georgetown
They are 16 of the 375 NPPES records with a practice address in Georgetown, and 2,700 family medicine physician records in South Carolina.
All 2,700 in South Carolina → Every provider in Georgetown → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Henry Adkins, MDGeorgetown, SC 294401578669297
- Julia Barton Hulsey, MDGeorgetown, SC 294401811490907
- Cornell Caviness, PA CGeorgetown, SC 294401558413435
- Thomas Crosby, MDGeorgetown, SC 294401285641175
- John Denton, MDGeorgetown, SC 294401669635884
- Lance Duvall, MDGeorgetown, SC 294401841275138
- Alexander Duvall, MDGeorgetown, SC 294401851323448
- Benjamin Ford, M.D.Georgetown, SC 294401225699671
Common questions
What is Luis Thormer Chastain, MD's NPI number?
Luis Thormer Chastain, MD's National Provider Identifier (NPI) is 1467477661, issued on Jul 12, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Luis Thormer Chastain, MD located?
The NPPES record lists a practice address at 1075 N Fraser St, Georgetown, SC, 29440. Phone: (843) 527-4442. Providers update this record themselves, so call before visiting.
How can I verify Luis Thormer Chastain, MD's license?
NPPES lists South Carolina license number 28078, 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 Luis Thormer Chastain, MD prescribe under Medicare Part D?
In 2024, Luis Thormer Chastain, MD had 16,040 Medicare Part D claims for 748 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
What is Luis Thormer Chastain, MD's MIPS final score?
The 2023 MIPS final score is 81.9 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.