Zachary A. Gregg, M.D.
Colon & Rectal Surgery Physician · Charlottesville, VA
Zachary A. Gregg, M.D. is a colon & rectal surgery physician with a practice address in Charlottesville, Virginia, and NPI 1285836312, issued on Jun 1, 2007. Check the license (Virginia 0101258691, as entered in NPPES) on the Virginia Department of Health Professions; the Medicare figures below come from public CMS files.
- Name
- Zachary A. Gregg
- Credential
- M.D.
- Primary taxonomy
- Colon & Rectal Surgery Physician 208C00000X
- License number
- 0101258691 VA
Self-reported in NPPES; status is on the state search - Practice location
- 500 Martha Jefferson Dr FL 5, Charlottesville, VA 22911
- Phone
- (434) 654-5260
- Enumerated
- Jun 1, 2007
- Record last updated
- Jul 3, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (434) 654-5261
- Medicare enrollment
- Enrolled (PECOS I20150817000010); accepts Medicare assignment
- Medical or professional school
- Rutgers New Jersey Medical School, 2007
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 500 Martha Jefferson Dr FL 5
A shared address usually means a shared clinic or building; it does not show who employs whom.
- David Calhoun, MDSleep Medicine (Internal Medicine) Physician1164468229
- Elizabeth Driscoll, FNPFamily Nurse Practitioner1699001016
- Elizabeth Foreman, MDSleep Medicine (Internal Medicine) Physician1336357078
- Taylor Geddes, PA-CPhysician Assistant1902632748
- Keri Hall, M.D.Infectious Disease Physician1245309871
- William Hammond, M. D.Sleep Medicine (Internal Medicine) Physician1740223320
Verify Zachary A. Gregg in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersVirginia Department of Health Professions
Search for license 0101258691Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
16% fewer Medicare Part D claims than the average colon & rectal surgery physician in 2024
161 Medicare Part D claims for 70 beneficiaries, against an average of 192 among the 1,836 providers of this specialty who prescribed in Part D. 42 claims were for opioids.
Most prescribed
- Oxycodone Hcl38 claims
- Metronidazole36 claims
- Neomycin Sulfate31 claims
- Amoxicillin-Clavulanate Potass24 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 MIPS final score for 2023 (Medicare payment program): 95.1 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Martha Jefferson Medical Group LLCCharlottesville, VA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Colon & Rectal Surgery Physician providers in Virginia
There are 54 colon & rectal surgery physician records in Virginia.
Other colon & rectal surgery physician records in Virginia
- Farrell Adkins, MDRoanoke, VA1992904882
- Homayoon Akbari, MD, PH.D.Emporia, VA1205831229
- Brian Billings, MDNewport News, VA1336125194
- Jaime Bohl, MDRichmond, VA1487701272
- Marine Bolliet, MDRichmond, VA1992387039
- Brian Buchberg, M.D.Chesapeake, VA1326222779
- Matthew Carr, M.D.Portsmouth, VA1629418017
- Paul Charron, M.D.Richmond, VA1700093515
- Ayana Chase Greaves, MDFredericksburg, VA1720221815
- Christina Cheng, M.D.Fairfax, VA1497092944
Common questions
What is Zachary A. Gregg, M.D.'s NPI number?
Zachary A. Gregg, M.D.'s National Provider Identifier (NPI) is 1285836312, issued on Jun 1, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Zachary A. Gregg, M.D. located?
The NPPES record lists a practice address at 500 Martha Jefferson Dr FL 5, Charlottesville, VA, 22911. Phone: (434) 654-5260. Providers update this record themselves, so call before visiting.
How can I verify Zachary A. Gregg, M.D.'s license?
NPPES lists Virginia license number 0101258691, as entered by the provider. Search the Virginia Department of Health Professions at https://dhp.virginiainteractive.org/lookup/index. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Zachary A. Gregg, M.D. prescribe under Medicare Part D?
In 2024, Zachary A. Gregg, M.D. had 161 Medicare Part D claims for 70 beneficiaries; the average among colon & rectal surgery physician prescribers was 192. Part D covers Medicare prescriptions only.
What is Zachary A. Gregg, M.D.'s MIPS final score?
The 2023 MIPS final score is 95.1 of 100. 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.