NPPES file of Aug 9, 2026

Mark Edwin Grenkoski, M.D.

Emergency Medicine Physician · Robbinsville, NC

Mark Edwin Grenkoski, M.D. is an emergency medicine physician with a practice address in Robbinsville, North Carolina, and NPI 1174567754, issued on Jun 15, 2006. Check the license (North Carolina 38069, as entered in NPPES) on the North Carolina Medical Board; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1174567754
Name
Mark Edwin Grenkoski
Credential
M.D.
Primary taxonomy
Emergency Medicine Physician 207P00000X
License numbers
38069 NC
34687 TN
Self-reported in NPPES; status is on the state search
Practice location
409 Tallulah RD, Robbinsville, NC 28771
Phone
(828) 479-6434
Enumerated
Jun 15, 2006
Record last updated
Aug 1, 2023
Medicaid IDs
3860884 TN
3860883 TN
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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Also registered at 409 Tallulah RD

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Kaitlyn Breiten, WHNPWomen's Health Nurse Practitioner1770147977
  2. Dixie Carter, LCSWClinical Social Worker1841549540
  3. William Clayton, M.D.Orthopaedic Surgery Physician1801980727
  4. Lisa Ferrigno, PACPhysician Assistant1508929936
  5. Sandy Gibson, ACNPAcute Care Nurse Practitioner1184065591
  6. Joel Harbolt, DPTOrthopedic Physical Therapist1043934193

Verify Mark Edwin Grenkoski in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersNorth Carolina Medical Board
    Search for license 38069    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the North Carolina license search

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12% fewer Medicare Part D claims than the average emergency medicine physician in 2024

198 Medicare Part D claims for 96 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.

  1. Mark Grenkoski198
  2. Specialty average226

Most prescribed

  1. Omeprazole19 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.

1 emergency medicine physician records list a practice address in Robbinsville

They are 1 of the 58 NPPES records with a practice address in Robbinsville, and 2,094 emergency medicine physician records in North Carolina.

All 2,094 in North Carolina → Every provider in Robbinsville →

Other emergency medicine physician records in North Carolina

  1. Kyle Abshire, M.D.Durham, NC1184044331
  2. Stephanny Acevedo MartinezGreenville, NC1508271560
  3. Joanna Adams, M.D.Greenville, NC1083900062
  4. John Adams, M.D.Oxford, NC1801116892
  5. Victor Adan, MDFranklin, NC1497719645
  6. Juliana Adedoyin, MDGreenville, NC1235758053
  7. Paula AdkinsSanford, NC1336193184
  8. Fekadu AdmasuFayetteville, NC1801050257
  9. Frank AgatucciDurham, NC1912971631
  10. David AhlersConcord, NC1972829166

Common questions

What is Mark Edwin Grenkoski, M.D.'s NPI number?

Mark Edwin Grenkoski, M.D.'s National Provider Identifier (NPI) is 1174567754, issued on Jun 15, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Mark Edwin Grenkoski, M.D. located?

The NPPES record lists a practice address at 409 Tallulah RD, Robbinsville, NC, 28771. Phone: (828) 479-6434. Providers update this record themselves, so call before visiting.

How can I verify Mark Edwin Grenkoski, M.D.'s license?

NPPES lists North Carolina license number 38069, as entered by the provider. Search the North Carolina Medical Board at https://portal.ncmedboard.org/verification/search.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does Mark Edwin Grenkoski, M.D. prescribe under Medicare Part D?

In 2024, Mark Edwin Grenkoski, M.D. had 198 Medicare Part D claims for 96 beneficiaries; the average among emergency medicine physician prescribers was 226. 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.