John Christopher Downs, M.D.
Medical Oncology Physician · Towson, MD
John Christopher Downs, M.D. is a medical oncology physician with a practice address in Towson, Maryland, and NPI 1093780496, issued on Feb 20, 2006. Check the license (Maryland D0033624, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- John Christopher Downs
- Credential
- M.D.
- Primary taxonomy
- Medical Oncology Physician 207RX0202X
- License number
- D0033624 MD
Self-reported in NPPES; status is on the state search - Practice location
- 7505 Osler Dr, Towson, MD 21204
- Phone
- (410) 494-9099
- Enumerated
- Feb 20, 2006
- Record last updated
- Jan 22, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (410) 825-5307
- Medicaid ID
- 475951600 MD
- Medicare enrollment
- Enrolled (PECOS I20241205004129); accepts Medicare assignment
- Medical or professional school
- State University Of Ny Upstate Medical University, 1981
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest medical oncology physician records → All 224 in Maryland → Look up another NPI →
Also registered at 7505 Osler Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify John Christopher Downs in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D0033624Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
82% fewer Medicare Part D claims than the average medical oncology physician in 2024
125 Medicare Part D claims for 41 beneficiaries, against an average of 703 among the 4,230 providers of this specialty who prescribed in Part D. Brand-name drugs were 42% of claims.
Most prescribed
- Anastrozole17 claims
- Hydroxyurea16 claims
- Lenalidomide11 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.
Bills Medicare through one group practice
- Medstar Medical Group II LLCWashington, DC
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Christopher Downs among 224 medical oncology physician records in Maryland
John Christopher Downs, M.D. is one of 224 medical oncology physician records with a practice address in Maryland. 67% 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 4% of them.
- NPI issued2006 · 4% of these records are older, 53% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated1981 · median 2000 among the 128 with a school on file
- Record last updated2020 · 69% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RX0202X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Medical Oncology Physician providers in Maryland
There are 224 medical oncology physician records in Maryland.
All 224 in Maryland → Every provider in Towson → Medical Oncology Physician nationwide →
The 8 medical oncology physician records with the nearest ZIP codes
- Paul Celano, M.D.Baltimore, MD 212041649222845
- Madhu Chaudhry, M.D.Baltimore, MD 212041447201678
- Gary Cohen, M.D.Baltimore, MD 212041184676462
- Rima Couzi, M.D.Towson, MD 212041356401608
- Robert Donegan, M.D.Baltimore, MD 212041689624181
- Shruti Murali, M.DTowson, MD 212041902241649
- Mei Tang, MDBaltimore, MD 212041457495483
- Shruti Chaturvedi, M.D.Baltimore, MD 212051508154345
Common questions
What is John Christopher Downs, M.D.'s NPI number?
John Christopher Downs, M.D.'s National Provider Identifier (NPI) is 1093780496, issued on Feb 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John Christopher Downs, M.D. located?
The NPPES record lists a practice address at 7505 Osler Dr, Towson, MD, 21204. Phone: (410) 494-9099. Providers update this record themselves, so call before visiting.
How can I verify John Christopher Downs, M.D.'s license?
NPPES lists Maryland license number D0033624, 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 John Christopher Downs, M.D. prescribe under Medicare Part D?
In 2024, John Christopher Downs, M.D. had 125 Medicare Part D claims for 41 beneficiaries; the average among medical oncology physician prescribers was 703. 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.