Robert Alan Nussbaum, M.D.
Gastroenterology Physician · Alexandria, VA
Robert Alan Nussbaum, M.D. is a gastroenterology physician with a practice address in Alexandria, Virginia, and NPI 1659364511, issued on Aug 25, 2005. Check the license (Virginia 0101047887, as entered in NPPES) on the Virginia Department of Health Professions; the Medicare figures below come from public CMS files.
- Name
- Robert Alan Nussbaum
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 0101047887 VA
Self-reported in NPPES; status is on the state search - Practice location
- 6355 Walker LN, Alexandria, VA 22310
- Phone
- (703) 313-8400
- Enumerated
- Aug 25, 2005
- Record last updated
- Mar 2, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (703) 313-9666
- Medicaid ID
- 5806372 VA
- Medicare enrollment
- Enrolled (PECOS I20111227000661); accepts Medicare assignment
- Medical or professional school
- Icahn School Of Medicine At Mount Sinai, 1986
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 536 in Virginia → Look up another NPI →
Also registered at 6355 Walker LN
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Robert Alan Nussbaum in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersVirginia Department of Health Professions
Search for license 0101047887Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
12% fewer Medicare Part D claims than the average gastroenterology physician in 2024
711 Medicare Part D claims for 349 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims.
Most prescribed
- Sod Sulf-Potass Sulf-Mag Sulf158 claims
- Omeprazole144 claims
- Famotidine69 claims
- Pantoprazole Sodium53 claims
- Esomeprazole Magnesium37 claims
- Linzess29 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): 85.2 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).
Robert Alan Nussbaum among 536 gastroenterology physician records in Virginia
Robert Alan Nussbaum, M.D. is one of 536 gastroenterology physician records with a practice address in Virginia. 85% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 83% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 73% of these records are
- Graduated1986 · median 2001 among the 389 with a school on file
- Record last updated2014 · 54% 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 Virginia practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Virginia
There are 536 gastroenterology physician records in Virginia.
All 536 in Virginia → Every provider in Alexandria → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Emad Abuhamda, MDAlexandria, VA 223101649228099
- Rufaat MandoAlexandria, VA 223101205242591
- Assad Munis, D.O.Alexandria, VA 223101528420437
- Rupa Shah, M.D.Alexandria, VA 223101740209147
- Michael Tseng, MDAlexandria, VA 223101497379903
- Bradley Winston, MDAlexandria, VA 223101720154073
- Stephanie WooAlexandria, VA 223101760942502
- Tanya Davis, MDAlexandria, VA 223061992886832
Common questions
What is Robert Alan Nussbaum, M.D.'s NPI number?
Robert Alan Nussbaum, M.D.'s National Provider Identifier (NPI) is 1659364511, issued on Aug 25, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Robert Alan Nussbaum, M.D. located?
The NPPES record lists a practice address at 6355 Walker LN, Alexandria, VA, 22310. Phone: (703) 313-8400. Providers update this record themselves, so call before visiting.
How can I verify Robert Alan Nussbaum, M.D.'s license?
NPPES lists Virginia license number 0101047887, 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 Robert Alan Nussbaum, M.D. prescribe under Medicare Part D?
In 2024, Robert Alan Nussbaum, M.D. had 711 Medicare Part D claims for 349 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
What is Robert Alan Nussbaum, M.D.'s MIPS final score?
The 2023 MIPS final score is 85.2 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.