Larry Douglas Grubb, MD
Radiation Oncology Physician · Sumter, SC
Larry Douglas Grubb, MD is a radiation oncology physician with a practice address in Sumter, South Carolina, and NPI 1013947589, issued on Jul 3, 2006. Check the license (South Carolina 15990, as entered in NPPES) on the South Carolina Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Larry Douglas Grubb
- Credential
- MD
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License number
- 15990 SC
Self-reported in NPPES; status is on the state search - Practice location
- 130 N Washington St, Sumter, SC 29150
- Phone
- (803) 774-8888
- Enumerated
- Jul 3, 2006
- Record last updated
- Aug 20, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (803) 778-6376
- Medicaid ID
- MPA270 SC
- Medicare enrollment
- Enrolled (PECOS I20250116003890); accepts Medicare assignment
- Medical or professional school
- University Of South Carolina School Of Medicine, 1983
- Entity
- Type 1 · individual
8 nearest radiation oncology physician records → All 80 in South Carolina → Look up another NPI →
Also registered at 130 N Washington St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Harvey Balfour, MDRadiation Oncology Physician1760473185
- William Collins, MDRadiation Oncology Physician1851365605
- Laurie Harrell, MDRadiation Oncology Physician1881863389
Verify Larry Douglas Grubb in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersSouth Carolina Board of Medical Examiners
Search for license 15990Check 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 radiation oncology physician in 2024
18 Medicare Part D claims, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Tamsulosin Hcl12 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
- Watauga Medical Center IncBoone, NC
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Larry Douglas Grubb among 80 radiation oncology physician records in South Carolina
Larry Douglas Grubb, MD is one of 80 radiation oncology physician records with a practice address in South Carolina. 89% 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 14% of them.
- NPI issued2006 · 14% of these records are older, 46% newer
- In a Medicare fileYes · 89% of these records are
- In the CMS Doctors and Clinicians fileYes · 78% of these records are
- Graduated1983 · median 2003 among the 62 with a school on file
- Record last updated2020 · 56% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0001X and a South Carolina practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Radiation Oncology Physician providers in South Carolina
There are 80 radiation oncology physician records in South Carolina.
All 80 in South Carolina → Every provider in Sumter → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- Harvey Balfour, MDSumter, SC 291501760473185
- William Collins, MDSumter, SC 291501851365605
- Edward Duffy, MDSumter, SC 291501568516383
- Laurie Harrell, MDSumter, SC 291501881863389
- Quillin Davis, MDWest Columbia, SC 291691770621989
- Joshua Lawson, MDWest Columbia, SC 291691972788479
- Ashley Schlafstein, MDWest Columbia, SC 291691104314939
- Hugh Merriman, M.D.Orangeburg, SC 291181942277058
Common questions
What is Larry Douglas Grubb, MD's NPI number?
Larry Douglas Grubb, MD's National Provider Identifier (NPI) is 1013947589, issued on Jul 3, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Larry Douglas Grubb, MD located?
The NPPES record lists a practice address at 130 N Washington St, Sumter, SC, 29150. Phone: (803) 774-8888. Providers update this record themselves, so call before visiting.
How can I verify Larry Douglas Grubb, MD's license?
NPPES lists South Carolina license number 15990, 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 Larry Douglas Grubb, MD prescribe under Medicare Part D?
In 2024, Larry Douglas Grubb, MD had 18 Medicare Part D claims; the average among radiation oncology physician prescribers was 134. 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.