Dr. Rebecca Felsen, MD
- Medicare services, 2018
- 47
- Part D claims, 2024
- 5,154
- Industry payments
- $90
- Affiliated sites
- 2
- Medical group
- 1
- Practice address
- 200 Girard Street, Suite 100, Gaithersburg, MD 20877
- Practice phone
- Call (301) 340-7525
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
CCI Health Services - Gaithersburg
FQHC - Main Site · Gaithersburg, Maryland
Find Dr. Felsen's professional email, personal email and mobile number
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Dr. Rebecca Felsen is an internist in Gaithersburg, Maryland
Dr. Felsen practices at CCI Health Services - Gaithersburg in Gaithersburg, Maryland.
Dr. Felsen's NPI, 1477863884, was assigned on October 19, 2010. Dr. Felsen graduated from Georgetown University School of Medicine in 2008. Dr. Felsen holds Maryland license D0073497.
- NPI
- 1477863884NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6608018783
- NPI enumeration date
- October 19, 2010
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (301) 340-7525
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 44
- Medical school graduation
- 2008
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Rebecca Felsen practices at 2 locations in Gaithersburg, Maryland
Dr. Felsen's primary practice is CCI Health Services - Gaithersburg, at 200 Girard Street, Suite 100, Gaithersburg, MD 20877. The practice phone is (301) 340-7525. Dr. Felsen also practices at Community Clinic, Inc., 220 Girard St, Gaithersburg, MD 20877.
- CCI Health Services - GaithersburgPrimary200 Girard Street, Suite 100, Gaithersburg, MD 20877Phone(301) 340-7525
- Community Clinic, Inc.220 Girard St, Gaithersburg, MD 20877 · Montgomery CountyPhone(301) 216-0880
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; and Dmand AI Practice Data
Dr. Rebecca Felsen is affiliated with 2 sites of care and 1 medical group
Dr. Felsen's primary practice is CCI Health Services - Gaithersburg in Gaithersburg, Maryland. The medical group on file is CCI Health Services. Dmand AI also links Dr. Felsen to 1 more home health agency, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Rebecca Felsen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Felsen practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| CCI Health Services - Gaithersburg | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Rebecca Felsen is one of 3,320 internists in Maryland
Internal medicine is Dr. Felsen's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dmand AI has Dr. Felsen's licenses on file in 2 states: Maryland and New Jersey.
Specialties and state licenses
- Internal medicine, MarylandPrimary
- New Jersey license
Internists near Dr. Felsen
Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Rebecca Felsen billed Medicare for 47 services in 2018
CMS data shows 47 Medicare services from Dr. Felsen across 2 procedure codes in 2018. Medicare paid $911 for them. Every service was in an office.
Dr. Felsen's Medicare services by type, 2017 to 2018
- 2017
- 2018
- Office and hospital visits
- 2017: 4482018: 3393%
- Lab and pathology
- 2017: 02018: 14
- Tests and treatments
- 2017: 142018: 0100%
Dr. Felsen compared with the Maryland median for internists, 2018
- Dr. Felsen
- Maryland median
- Medicare services
- 47vs 65693% below
- Part D claims
- 4,495vs 30914.5 times
Medians across 3,215 internists in Maryland with Dmand AI profiles that report each measure.
Dr. Felsen's most billed Medicare procedure codes, 2018
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Felsen and other internists in Maryland.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Rebecca Felsen's patients have a median age of 58
Across all payers, Dmand AI patient panel data puts Dr. Felsen's median patient age at 58, with 70% women.
Dr. Felsen's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 58
Patient panel by sex, all payers
- Women70%
- Men29%
Source: Dmand AI Patient Panel Data
Dr. Rebecca Felsen wrote 5,154 Medicare Part D claims in 2024
In 2024, Dr. Felsen wrote 5,154 Medicare Part D claims for 399 patients. 86% of them were for generic drugs. CMS names the drug for 4,495 of them, across 89 drugs with 11 or more claims each, at $368,314 in total drug cost. In 2023, CMS named 3,056 claims across 73 drugs.
Dr. Felsen's Part D claims by kind of drug, 2024
- Generic4,448 claims86%
- Brand-name657 claims13%
- Other49 claims1%
Dr. Felsen's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Felsen's Part D claims, 2024
- Opioids0%24 of 5,154 claims
- Antibiotics3%174 of 5,154 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 3,0562024: 4,49547%
Drugs named by CMS: 89 in 2024, 73 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Rebecca Felsen takes part in Medicare
Dr. Felsen accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Rebecca Felsen received $90 in industry payments from 2016 to 2024
CMS Open Payments shows 6 general payments to Dr. Felsen from 6 drug and device companies from 2016 to 2024. Food and beverage make up the largest share, 100% of the total. GlaxoSmithKline, LLC. paid the most, $19.
General payments to Dr. Felsen by program year, 2016 to 2024
Companies that paid Dr. Felsen the most, 2016 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Rebecca Felsen graduated from Georgetown University School of Medicine
Dr. Felsen graduated from Georgetown University School of Medicine in 2008.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Rebecca Felsen's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Affiliation DataDmand AI Practice Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Rebecca Felsen
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Rebecca Felsen's NPI number?
Dr. Rebecca Felsen's NPI number is 1477863884. It was assigned on October 19, 2010, and it is active in the NPI Registry.
What kind of doctor is Dr. Rebecca Felsen?
Dr. Rebecca Felsen is an internist in Gaithersburg, Maryland. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Rebecca Felsen practice?
Dr. Felsen practices at 200 Girard Street, Suite 100, Gaithersburg, MD 20877. Dr. Felsen also practices at 220 Girard St, Gaithersburg, MD 20877. Dr. Felsen's primary practice is CCI Health Services - Gaithersburg in Gaithersburg, Maryland. Dmand AI also links Dr. Felsen to 1 home health agency.
What is Dr. Rebecca Felsen's office phone number?
The practice phone on file for Dr. Felsen is (301) 340-7525.
What is Dr. Rebecca Felsen's medical license number?
Dr. Felsen holds Maryland license D0073497, one of the licenses on file in 2 states.
Which states has Dr. Rebecca Felsen been licensed in?
Dmand AI has state licenses on file for Dr. Felsen in Maryland and New Jersey.
What medical group is Dr. Rebecca Felsen part of?
Dr. Felsen is linked to CCI Health Services.
Does Dr. Rebecca Felsen accept Medicare?
Yes. CMS data shows Dr. Felsen billed Medicare for 47 services in 2018, and Dr. Felsen accepts Medicare assignment.
What services does Dr. Rebecca Felsen bill to Medicare?
In 2018, Dr. Felsen's most billed Medicare services were office visit, established patient (99213) and lab and pathology test (81002).
Where did Dr. Rebecca Felsen go to medical school?
Dr. Felsen graduated from Georgetown University School of Medicine in 2008.
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What drugs does Dr. Rebecca Felsen prescribe most?
In 2024 Medicare Part D data, Dr. Felsen's most prescribed drugs by claims were Amlodipine Besylate, Atorvastatin Calcium and Metformin HCl.
Has Dr. Rebecca Felsen received payments from drug or device companies?
CMS Open Payments shows $90 in general payments to Dr. Felsen from 6 companies from 2016 to 2024. The largest total came from GlaxoSmithKline, LLC.
How long has Dr. Rebecca Felsen been practicing?
Dr. Felsen graduated from medical school in 2008, 18 years ago.
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