Jordan J. Grnak, DO
Internal Medicine Physician · Greenville, SC
Jordan J. Grnak, DO is an internal medicine physician with a practice address in Greenville, South Carolina, and NPI 1922501204, issued on Mar 13, 2018. Check the license (South Carolina MDO.83463, as entered in NPPES) on the South Carolina Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Jordan J. Grnak
- Credential
- DO
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- MDO.83463 SC
5101025371 MI
Self-reported in NPPES; status is on the state search - Practice location
- 5 S Lewis Plz, Greenville, SC 29605
- Phone
- (864) 242-4122
- Enumerated
- Mar 13, 2018
- Record last updated
- Jun 28, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20210830002439); accepts Medicare assignment
- Medical or professional school
- Lake Erie College Of Osteopathic Medicine, Erie, 2018
- 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 5 S Lewis Plz
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Ana Endaya, DNP, APRN, FNP-BCFamily Nurse Practitioner1962802124
Verify Jordan J. Grnak in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersSouth Carolina Board of Medical Examiners
Search for license MDO.83463Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
80% more Medicare Part D claims than the average internal medicine physician in 2024
5,728 Medicare Part D claims for 415 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims. 44 claims were for opioids.
Most prescribed
- Atorvastatin Calcium281 claims
- Rosuvastatin Calcium213 claims
- Amlodipine Besylate187 claims
- Levothyroxine Sodium183 claims
- Gabapentin174 claims
- Losartan Potassium139 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
- St Francis Physician Services IncGreenville, SC
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jordan J. Grnak among 1,881 internal medicine physician records in South Carolina
Jordan J. Grnak, DO 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 2018, is newer than 69% of them.
- NPI issued2018 · 69% of these records are older, 28% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2018 · 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).
253 internal medicine physician records list a practice address in Greenville
They are 253 of the 10,264 NPPES records with a practice address in Greenville, and 1,881 internal medicine physician records in South Carolina.
All 1,881 in South Carolina → Every provider in Greenville → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Stacy Bizzell, M.D.Greenville, SC 296051427008432
- Barry Blackston, M.D.Greenville, SC 296051316948185
- Mincs Calixte, M.D.Greenville, SC 296051215990338
- Joseph Del Zotto, D.O.Greenville, SC 296051457356776
- W Fridy, M.D.Greenville, SC 296051730139429
- Merrill Gildersleeve, M.D.Greenville, SC 296051215987060
- Paari Gopalakrishnan, MDGreenville, SC 296051316925464
- Meenu Jindal, M.D.Greenville, SC 296051548210149
Common questions
What is Jordan J. Grnak, DO's NPI number?
Jordan J. Grnak, DO's National Provider Identifier (NPI) is 1922501204, issued on Mar 13, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Jordan J. Grnak, DO located?
The NPPES record lists a practice address at 5 S Lewis Plz, Greenville, SC, 29605. Phone: (864) 242-4122. Providers update this record themselves, so call before visiting.
How can I verify Jordan J. Grnak, DO's license?
NPPES lists South Carolina license number MDO.83463, 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 Jordan J. Grnak, DO prescribe under Medicare Part D?
In 2024, Jordan J. Grnak, DO had 5,728 Medicare Part D claims for 415 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.