Deborah Horwitz, MD
Internal Medicine Physician · Bethesda, MD
Deborah Horwitz, MD is an internal medicine physician with a practice address in Bethesda, Maryland, and NPI 1770520785, issued on May 31, 2006. Check the license on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Deborah Horwitz
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- MD35082 DC
Self-reported in NPPES; status is on the state search - Practice location
- 6410 Rockledge Dr, Bethesda, MD 20817
- Phone
- (301) 897-5001
- Enumerated
- May 31, 2006
- Record last updated
- Sep 22, 2011 (not updated in 15 years: call before relying on the address or phone)
- Medicaid IDs
- 035954600 DC
405477600 MD - Medicare enrollment
- Enrolled (PECOS I20040913001005); accepts Medicare assignment
- Medical or professional school
- Temple University School Of Medicine, 1996
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 3,904 in Maryland → Look up another NPI →
Also registered at 6410 Rockledge Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Katherine Alley, MDSurgery Physician1811916158
- Rebecca Aronson, D.O.Physical Medicine & Rehabilitation Physician1760494546
- Christine Baron, SLPSpeech-Language Pathologist1659433365
Verify Deborah Horwitz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of PhysiciansCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
77% more Medicare Part D claims than the average internal medicine physician in 2024
5,631 Medicare Part D claims for 629 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 15 claims were for opioids.
Most prescribed
- Atorvastatin Calcium719 claims
- Amlodipine Besylate367 claims
- Levothyroxine Sodium273 claims
- Rosuvastatin Calcium260 claims
- Losartan Potassium167 claims
- Escitalopram Oxalate162 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): 80.2 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: $49.13
2 payments; by number, the most common kind was food and beverage; the largest payer was Lilly USA, 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
- Medstar Medical Group II LLCWashington, DC
- 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).
Deborah Horwitz among 3,904 internal medicine physician records in Maryland
Deborah Horwitz, 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 2006, is newer than 9% of them.
- NPI issued2006 · 9% of these records are older, 55% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1996 · median 2003 among the 2,445 with a school on file
- Record last updated2011 · 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).
288 internal medicine physician records list a practice address in Bethesda
They are 288 of the 7,245 NPPES records with a practice address in Bethesda, and 3,904 internal medicine physician records in Maryland.
All 3,904 in Maryland → Every provider in Bethesda → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Susan BaruchBethesda, MD 208171528032976
- Brent Berger, MDBethesda, MD 208171578537429
- Dave Chen, MDBethesda, MD 208171174571293
- Brent Cole, M.D.Bethesda, MD 208171558336321
- Bradley Hunter, DOBethesda, MD 208171497703581
- Kian Kaviani, MDBethesda, MD 208171003851965
- Thomas McNamara, MDBethesda, MD 208171427047877
- Lee Pennington, MDBethesda, MD 208171548259997
Common questions
What is Deborah Horwitz, MD's NPI number?
Deborah Horwitz, MD's National Provider Identifier (NPI) is 1770520785, issued on May 31, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Deborah Horwitz, MD located?
The NPPES record lists a practice address at 6410 Rockledge Dr, Bethesda, MD, 20817. Phone: (301) 897-5001. Providers update this record themselves, so call before visiting.
How can I verify Deborah Horwitz, MD's license?
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 Deborah Horwitz, MD prescribe under Medicare Part D?
In 2024, Deborah Horwitz, MD had 5,631 Medicare Part D claims for 629 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Deborah Horwitz, MD's MIPS final score?
The 2023 MIPS final score is 80.2 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.