Grace Catherine Ernstberger, MD
Internal Medicine Physician · Durham, NC
Grace Catherine Ernstberger, MD is an internal medicine physician with a practice address in Durham, North Carolina, and NPI 1427637800, issued on Apr 5, 2021. Check the license (North Carolina 2024-01193, as entered in NPPES) on the North Carolina Medical Board; the Medicare figures below come from public CMS files.
- Name
- Grace Catherine Ernstberger
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 2024-01193 NC
Self-reported in NPPES; status is on the state search - Practice location
- 2301 Erwin RD, Durham, NC 27705
- Phone
- (919) 684-8111
- Enumerated
- Apr 5, 2021
- Record last updated
- Aug 31, 2024
- Medicare enrollment
- Enrolled (PECOS I20241002002170); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 4,056 in North Carolina → Look up another NPI →
Also registered at 2301 Erwin RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Grace Catherine Ernstberger in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNorth Carolina Medical Board
Search for license 2024-01193Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
89% fewer Medicare Part D claims than the average internal medicine physician in 2024
363 Medicare Part D claims for 90 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium21 claims
- Furosemide20 claims
- Fluticasone Propionate16 claims
- Amlodipine Besylate14 claims
- Diclofenac Sodium14 claims
- Levetiracetam12 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
- Duke University Health System, IncDurham, NC
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Grace Catherine Ernstberger among 4,056 internal medicine physician records in North Carolina
Grace Catherine Ernstberger, MD is one of 4,056 internal medicine physician records with a practice address in North Carolina. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 92% of them.
- NPI issued2021 · 92% of these records are older, 5% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 67% of these records are
- Graduated2021 · median 2004 among the 2,706 with a school on file
- Record last updated2024 · 48% 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 North Carolina practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
380 internal medicine physician records list a practice address in Durham
They are 380 of the 13,451 NPPES records with a practice address in Durham, and 4,056 internal medicine physician records in North Carolina.
All 4,056 in North Carolina → Every provider in Durham → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Vaidehi Boinapally, MDDurham, NC 277051548227978
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- William Knaack, M.D.Durham, NC 277051982666517
- Stuart Manning, M.D.Durham, NC 277051043217086
- David Matchar, MDDurham, NC 277051942261268
- Claudia Nassaralla, M.D.Durham, NC 277051114903275
- John Paat, M.D.Durham, NC 277051518944909
- Suman PrasadDurham, NC 277051760460349
Common questions
What is Grace Catherine Ernstberger, MD's NPI number?
Grace Catherine Ernstberger, MD's National Provider Identifier (NPI) is 1427637800, issued on Apr 5, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Grace Catherine Ernstberger, MD located?
The NPPES record lists a practice address at 2301 Erwin RD, Durham, NC, 27705. Phone: (919) 684-8111. Providers update this record themselves, so call before visiting.
How can I verify Grace Catherine Ernstberger, MD's license?
NPPES lists North Carolina license number 2024-01193, 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 Grace Catherine Ernstberger, MD prescribe under Medicare Part D?
In 2024, Grace Catherine Ernstberger, MD had 363 Medicare Part D claims for 90 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.