Joanna Grabska, MD
Hematology & Oncology Physician · Greenville, SC
Joanna Grabska, MD is a hematology & oncology physician with a practice address in Greenville, South Carolina, and NPI 1144546557, issued on Apr 9, 2010. Check the license (South Carolina 40623, as entered in NPPES) on the South Carolina Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Joanna Grabska
- Credential
- MD
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- 40623 SC
Self-reported in NPPES; status is on the state search - Practice location
- 104 Innovation Dr. Ste. 2000, Greenville, SC 29607
- Phone
- (864) 603-6300
- Enumerated
- Apr 9, 2010
- Record last updated
- Jul 21, 2022
- Fax
- (864) 603-6160
- Medicare enrollment
- Enrolled (PECOS I20171117002310); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 181 in South Carolina → Look up another NPI →
Verify Joanna Grabska in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersSouth Carolina Board of Medical Examiners
Search for license 40623Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
20% more Medicare Part D claims than the average hematology & oncology physician in 2024
1,050 Medicare Part D claims for 281 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims. 30 claims were for opioids.
Most prescribed
- Letrozole221 claims
- Anastrozole151 claims
- Tamoxifen Citrate77 claims
- Xarelto40 claims
- Exemestane39 claims
- Ibrance34 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.
2 hospitals and group practices
- Spartanburg Medical CenterSpartanburg, SC · Acute Care Hospitals2 of 5 stars
- Bon Secours Medical Group Greenville Specialty Care LLCGreenville, SC
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Joanna Grabska among 181 hematology & oncology physician records in South Carolina
Joanna Grabska, MD is one of 181 hematology & oncology physician records with a practice address in South Carolina. 86% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 67% of them.
- NPI issued2010 · 67% of these records are older, 30% newer
- In a Medicare fileYes · 86% of these records are
- In the CMS Doctors and Clinicians fileYes · 77% of these records are
- Graduated2010 · median 2006 among the 139 with a school on file
- Record last updated2022 · 52% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0003X and a South Carolina practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology & Oncology Physician providers in South Carolina
There are 181 hematology & oncology physician records in South Carolina.
All 181 in South Carolina → Every provider in Greenville → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Stephen Dyar, MDGreenville, SC 296071497883565
- Anuja Kamat, MDGreenville, SC 296071730675364
- Kevin Koehler, MDGreenville, SC 296071093034746
- Reginald Brooker, MDGreenville, SC 296051871598201
- William Edenfield, MDGreenville, SC 296051851396295
- William Gluck, MDGreenville, SC 296051053316349
- Michael Haughton, M.D.Greenville, SC 296051316266208
- Richard O'Neal, M.D.Greenville, SC 296051437562386
Common questions
What is Joanna Grabska, MD's NPI number?
Joanna Grabska, MD's National Provider Identifier (NPI) is 1144546557, issued on Apr 9, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Joanna Grabska, MD located?
The NPPES record lists a practice address at 104 Innovation Dr. Ste. 2000, Greenville, SC, 29607. Phone: (864) 603-6300. Providers update this record themselves, so call before visiting.
How can I verify Joanna Grabska, MD's license?
NPPES lists South Carolina license number 40623, 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 Joanna Grabska, MD prescribe under Medicare Part D?
In 2024, Joanna Grabska, MD had 1,050 Medicare Part D claims for 281 beneficiaries; the average among hematology & oncology physician prescribers was 877. 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.