Joseph C. Masdeu, M.D., PH.D.
Neurology Physician · Bethesda, MD
Joseph C. Masdeu, M.D., PH.D. is a neurology physician with a practice address in Bethesda, Maryland, and NPI 1376853770, issued on Oct 19, 2010. Check the license on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Joseph C. Masdeu
- Credential
- M.D., PH.D.
- Primary taxonomy
- Neurology Physician 2084N0400X
- License number
- Q4804 TX
Self-reported in NPPES; status is on the state search - Practice location
- National Institutes OF Health, Bethesda, MD 20892
- Phone
- (301) 443-2096
- Enumerated
- Oct 19, 2010
- Record last updated
- Jul 14, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (301) 496-7437
- Medicare enrollment
- Enrolled (PECOS I20140304000840); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest neurology physician records → All 526 in Maryland → Look up another NPI →
Also registered at National Institutes OF Health
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Josephine Briggs, M.D.Internal Medicine Physician1124392428
- Donna Chauvet, N.PAcute Care Nurse Practitioner1770732083
- Ray Chen, M.D.Infectious Disease Physician1376836528
- Leonardo Cohen, M.D.Neurology Physician1932418209
- Anna Conrey, MSN, RN, CCRN, CRNPAcute Care Nurse Practitioner1689731895
Verify Joseph C. Masdeu 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
24% fewer Medicare Part D claims than the average neurology physician in 2024
1,039 Medicare Part D claims for 204 beneficiaries, against an average of 1,370 among the 15,005 providers of this specialty who prescribed in Part D. Brand-name drugs were 6% of claims.
Most prescribed
- Donepezil Hcl388 claims
- Memantine Hcl145 claims
- Quetiapine Fumarate84 claims
- Divalproex Sodium46 claims
- Trazodone Hcl45 claims
- Escitalopram Oxalate41 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: $13,092.86
25 payments; by number, the most common kind was food and beverage; the largest payer was Lilly USA, LLC. The 10,858 providers of this specialty with any payment received $8,318.07 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
- Houston Methodist Specialty PhysiciansHouston, TX
- Tmh Physician Associates PLLCSugar Land, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Joseph C. Masdeu among 526 neurology physician records in Maryland
Joseph C. Masdeu, M.D., PH.D. is one of 526 neurology physician records with a practice address in Maryland. 74% 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 67% of them.
- NPI issued2010 · 67% of these records are older, 30% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated1969 · median 2004 among the 325 with a school on file
- Record last updated2020 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084N0400X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
78 neurology physician records list a practice address in Bethesda
They are 78 of the 7,245 NPPES records with a practice address in Bethesda, and 526 neurology physician records in Maryland.
All 526 in Maryland → Every provider in Bethesda → Neurology Physician nationwide →
The 8 neurology physician records with the nearest ZIP codes
- Abdullah Alqahtani, M.D, MPHBethesda, MD 208921184008211
- Rohan AroraBethesda, MD 208921689941007
- Bibiana Bielekova, M.D.Bethesda, MD 208921467491480
- Allen Braun, M.D.Bethesda, MD 208921467695114
- Wilson Bryan, M.D.Bethesda, MD 208921629202056
- Leonardo Cohen, M.D.Bethesda, MD 208921932418209
- Kenneth Fischbeck, M.D.Bethesda, MD 208921407067374
- Mary Kay Floeter, M.D.Bethesda, MD 208921235388174
Common questions
What is Joseph C. Masdeu, M.D., PH.D.'s NPI number?
Joseph C. Masdeu, M.D., PH.D.'s National Provider Identifier (NPI) is 1376853770, issued on Oct 19, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Joseph C. Masdeu, M.D., PH.D. located?
The NPPES record lists a practice address at National Institutes OF Health, Bethesda, MD, 20892. Phone: (301) 443-2096. Providers update this record themselves, so call before visiting.
How can I verify Joseph C. Masdeu, M.D., PH.D.'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 Joseph C. Masdeu, M.D., PH.D. prescribe under Medicare Part D?
In 2024, Joseph C. Masdeu, M.D., PH.D. had 1,039 Medicare Part D claims for 204 beneficiaries; the average among neurology physician prescribers was 1,370. 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.