Rebecca Felsen, MD
Internal Medicine Physician · Gaithersburg, MD
Rebecca Felsen, MD is an internal medicine physician with a practice address in Gaithersburg, Maryland, and NPI 1477863884, issued on Oct 19, 2010. Check the license (Maryland D0073497, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Rebecca Felsen
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- D0073497 MD
25MA08888000 NJ
Self-reported in NPPES; status is on the state search - Practice location
- 200 Girard St, Gaithersburg, MD 20877
- Phone
- (301) 216-0880
- Enumerated
- Oct 19, 2010
- Record last updated
- Oct 2, 2024
- Medicare enrollment
- Enrolled (PECOS I20130820000783); accepts Medicare assignment
- Medical or professional school
- Georgetown University School Of Medicine, 2008
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 3,904 in Maryland → Look up another NPI →
Also registered at 200 Girard St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Andrea Aguilar, RNRegistered Nurse1134524143
- Katherine Barbee, CRNPNurse Practitioner1619171469
- Evonne Bing, M.D.Pediatrics Physician1043372527
- Gloria Cortez, RNRegistered Nurse1255639449
- Jill Jacobs, RDHDental Hygienist1215475603
- Linda Katz, M.D.Rheumatology Physician1679675797
Verify Rebecca Felsen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D0073497Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
62% more Medicare Part D claims than the average internal medicine physician in 2024
5,154 Medicare Part D claims for 399 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 24 claims were for opioids.
Most prescribed
- Amlodipine Besylate320 claims
- Atorvastatin Calcium303 claims
- Metformin Hcl282 claims
- Levothyroxine Sodium217 claims
- Albuterol Sulfate Hfa181 claims
- Pantoprazole Sodium180 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.
Industry payments in 2024: $15.41
1 payment: food and beverage; the largest payer was Merck Sharp & Dohme LLC. The 50,334 providers of this specialty with any payment received $1,303.06 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 2 group practices
- Community Clinic, IncTakoma Park, MD
- Suburban/nrh Medical Rehabilitation IncBethesda, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Rebecca Felsen among 3,904 internal medicine physician records in Maryland
Rebecca Felsen, MD is one of 3,904 internal medicine physician records with a practice address in Maryland. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 64% of them.
- NPI issued2010 · 64% of these records are older, 33% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2008 · median 2003 among the 2,445 with a school on file
- Record last updated2024 · 59% 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 Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
67 internal medicine physician records list a practice address in Gaithersburg
They are 67 of the 2,580 NPPES records with a practice address in Gaithersburg, and 3,904 internal medicine physician records in Maryland.
All 3,904 in Maryland → Every provider in Gaithersburg → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Suhair Abulfarag, MDGaithersburg, MD 208771093818932
- Linda Benson, M.D.Gaithersburg, MD 208771316073265
- Kamala Foster, M.D.Gaithersburg, MD 208771174680656
- Kshama Garg, M.D.Gaithersburg, MD 208771295806511
- Marlene Hayman, MDGaithersburg, MD 208771922176932
- Leszek Karowiec, MDGaithersburg, MD 208771265519672
- Attan Kasid, MDGaithersburg, MD 208771740362599
- Baolang Liao, M.D.Gaithersburg, MD 208771215974464
Common questions
What is Rebecca Felsen, MD's NPI number?
Rebecca Felsen, MD's National Provider Identifier (NPI) is 1477863884, issued on Oct 19, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Rebecca Felsen, MD located?
The NPPES record lists a practice address at 200 Girard St, Gaithersburg, MD, 20877. Phone: (301) 216-0880. Providers update this record themselves, so call before visiting.
How can I verify Rebecca Felsen, MD's license?
NPPES lists Maryland license number D0073497, as entered by the provider. Search the Maryland Board of Physicians at https://www.mbp.state.md.us/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Rebecca Felsen, MD prescribe under Medicare Part D?
In 2024, Rebecca Felsen, MD had 5,154 Medicare Part D claims for 399 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.