Gretchen Elizabeth Twork, M.D.
Internal Medicine Physician · Lebanon, NH
Gretchen Elizabeth Twork, M.D. is an internal medicine physician with a practice address in Lebanon, New Hampshire, and NPI 1588759872, issued on Oct 4, 2006. Check the license (New Hampshire 12768, as entered in NPPES) on the New Hampshire Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- Gretchen Elizabeth Twork
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 12768 NH
Self-reported in NPPES; status is on the state search - Practice location
- 1 Medical Center Dr, Lebanon, NH 03756
- Phone
- (603) 650-8380
- Enumerated
- Oct 4, 2006
- Record last updated
- Dec 16, 2025
- Fax
- (603) 640-1228
- Medicare enrollment
- Enrolled (PECOS I20050714000721); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 673 in New Hampshire → Look up another NPI →
Also registered at 1 Medical Center Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Maria Abbate, NPFamily Nurse Practitioner1669683637
- McCall Abbott, APRNFamily Nurse Practitioner1396292454
- Lauren AbbuhlStudent in an Organized Health Care Education/Training Program1760322986
- William Abdu, M.D.Orthopaedic Surgery of the Spine Physician1134162324
- Iryna Aberkorn, MDFamily Medicine Physician1780846071
- Majd Aboul Hosn, MDStudent in an Organized Health Care Education/Training Program1932901949
Verify Gretchen Elizabeth Twork in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNew Hampshire Board of Medicine
Search for license 12768Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
97% fewer Medicare Part D claims than the average internal medicine physician in 2024
87 Medicare Part D claims for 33 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
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.
The practice group's MIPS final score for 2023 (Medicare payment program): 86.8 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
2 hospitals and group practices
- Alice Peck Day Memorial HospitalLebanon, NH · Critical Access Hospitals4 of 5 stars
- Dartmouth-Hitchcock ClinicLebanon, NH
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.
Gretchen Elizabeth Twork among 673 internal medicine physician records in New Hampshire
Gretchen Elizabeth Twork, M.D. is one of 673 internal medicine physician records with a practice address in New Hampshire. 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 2006, is newer than 8% of them.
- NPI issued2006 · 8% of these records are older, 50% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2002 · median 2005 among the 443 with a school on file
- Record last updated2025 · 53% 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 New Hampshire practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
167 internal medicine physician records list a practice address in Lebanon
They are 167 of the 3,530 NPPES records with a practice address in Lebanon, and 673 internal medicine physician records in New Hampshire.
All 673 in New Hampshire → Every provider in Lebanon → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Frances Brokaw, MD, MSLebanon, NH 037561447291604
- Theresa Caputo, MDLebanon, NH 037561740259886
- Linda Dacey, M.D.Lebanon, NH 037561760428007
- Margaret Doucette, NPLebanon, NH 037561669419172
- Harley Friedman, M.D.Lebanon, NH 037561619922010
- Rowland Hazard, M.D.Lebanon, NH 037561508801143
- Kelly Kieffer, MDLebanon, NH 037561740224443
- Stephen Liu, M.D.Lebanon, NH 037561578507141
Common questions
What is Gretchen Elizabeth Twork, M.D.'s NPI number?
Gretchen Elizabeth Twork, M.D.'s National Provider Identifier (NPI) is 1588759872, issued on Oct 4, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gretchen Elizabeth Twork, M.D. located?
The NPPES record lists a practice address at 1 Medical Center Dr, Lebanon, NH, 03756. Phone: (603) 650-8380. Providers update this record themselves, so call before visiting.
How can I verify Gretchen Elizabeth Twork, M.D.'s license?
NPPES lists New Hampshire license number 12768, as entered by the provider. Search the New Hampshire Board of Medicine at https://www.oplc.nh.gov/board-medicine. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Gretchen Elizabeth Twork, M.D. prescribe under Medicare Part D?
In 2024, Gretchen Elizabeth Twork, M.D. had 87 Medicare Part D claims for 33 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Gretchen Elizabeth Twork, M.D.'s MIPS final score?
The 2023 MIPS final score is 86.8 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.