Garrett Greenan, MD
Gastroenterology Physician · Davidson, NC
Garrett Greenan, MD is a gastroenterology physician with a practice address in Davidson, North Carolina, and NPI 1225579584, issued on Mar 20, 2017. Check the license (North Carolina 2023-01019, as entered in NPPES) on the North Carolina Medical Board; the Medicare figures below come from public CMS files.
- Name
- Garrett Greenan
- Credential
- MD
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License numbers
- 2023-01019 NC
2020011722 MO
Self-reported in NPPES; status is on the state search - Practice location
- 705 Griffith St Ste 205, Davidson, NC 28036
- Phone
- (704) 372-7974
- Enumerated
- Mar 20, 2017
- Record last updated
- Jan 13, 2026
- Fax
- (704) 372-8201
- Medicare enrollment
- Enrolled (PECOS I20230901003342); accepts Medicare assignment
- Medical or professional school
- University Of Maryland School Of Medicine, 2017
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 681 in North Carolina → Look up another NPI →
Verify Garrett Greenan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNorth Carolina Medical Board
Search for license 2023-01019Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.0 times the Medicare Part D claims of the average gastroenterology physician in 2024
1,651 Medicare Part D claims for 620 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 25% of claims.
Most prescribed
- Omeprazole294 claims
- Pantoprazole Sodium181 claims
- Gavilyte-G148 claims
- Sod Sulf-Potass Sulf-Mag Sulf138 claims
- Linzess92 claims
- Diphenoxylate-Atropine47 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 91.1 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).
Industry payments in 2024: $3,497.67
187 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 13,350 providers of this specialty with any payment received $5,015.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Carolina Digestive Health Associates PADavidson, NC
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Garrett Greenan among 681 gastroenterology physician records in North Carolina
Garrett Greenan, MD is one of 681 gastroenterology physician records with a practice address in North Carolina. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2017, is newer than 90% of them.
- NPI issued2017 · 90% of these records are older, 8% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 73% of these records are
- Graduated2017 · median 2002 among the 498 with a school on file
- Record last updated2026 · 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 207RG0100X and a North Carolina practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in North Carolina
There are 681 gastroenterology physician records in North Carolina.
All 681 in North Carolina → Every provider in Davidson → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Stephen Melson, MDForest City, NC 280431033206461
- Mark Aldous, M.D.Concord, NC 280251396754446
- Geanina Anghel, MDConcord, NC 280251982899175
- Alan Chiemprabha, M.D.Concord, NC 280251356350227
- Nirav Chiniwalla, MDConcord, NC 280251114955291
- Thomas Dalton, M.D.Concord, NC 280251649289786
- Robert Foust, M.D.Concord, NC 280251649289521
- Sara Hawes, MDConcord, NC 280251710179536
Common questions
What is Garrett Greenan, MD's NPI number?
Garrett Greenan, MD's National Provider Identifier (NPI) is 1225579584, issued on Mar 20, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Garrett Greenan, MD located?
The NPPES record lists a practice address at 705 Griffith St Ste 205, Davidson, NC, 28036. Phone: (704) 372-7974. Providers update this record themselves, so call before visiting.
How can I verify Garrett Greenan, MD's license?
NPPES lists North Carolina license number 2023-01019, 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 Garrett Greenan, MD prescribe under Medicare Part D?
In 2024, Garrett Greenan, MD had 1,651 Medicare Part D claims for 620 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
What is Garrett Greenan, MD's MIPS final score?
The 2023 MIPS final score is 91.1 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.