Benjamin Cassin Johnson, MD
Internal Medicine Physician · Baltimore, MD
Benjamin Cassin Johnson, MD is an internal medicine physician with a practice address in Baltimore, Maryland, and NPI 1497332928, issued on Mar 29, 2021. Check the license (Maryland D0103076, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Benjamin Cassin Johnson
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- D0103076 MD
Self-reported in NPPES; status is on the state search - Practice location
- 1800 Orleans St, Baltimore, MD 21287
- Phone
- (410) 955-5000
- Enumerated
- Mar 29, 2021
- Record last updated
- Mar 18, 2025
- Medicare enrollment
- Enrolled (PECOS I20250604000467); may accept Medicare assignment
- Medical or professional school
- Perelman School Of Med At The University Of Pennsylvania, 2021
- 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 1800 Orleans St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Benjamin Cassin Johnson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D0103076Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
94% fewer Medicare Part D claims than the average internal medicine physician in 2024
189 Medicare Part D claims for 49 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Fluticasone Propionate11 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 2 group practices
- Baltimore Medical System, Inc.Baltimore, MD
- Johns Hopkins UniversityBaltimore, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Benjamin Cassin Johnson among 3,904 internal medicine physician records in Maryland
Benjamin Cassin Johnson, 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 2021, is newer than 92% of them.
- NPI issued2021 · 92% of these records are older, 5% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2021 · median 2003 among the 2,445 with a school on file
- Record last updated2025 · 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).
1,278 internal medicine physician records list a practice address in Baltimore
They are 1,278 of the 35,183 NPPES records with a practice address in Baltimore, and 3,904 internal medicine physician records in Maryland.
All 3,904 in Maryland → Every provider in Baltimore → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
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- Patricia Barditch-Crovo, M.D.Baltimore, MD 212871477518033
- Eric Bass, M.D.Baltimore, MD 212871346205416
- Christie Basseth, M.D.Baltimore, MD 212871972568426
- Mary Catherine Beach, M.D.Baltimore, MD 212871598720922
- Valeriani Bead, M.D.Baltimore, MD 212871396700720
- Gail Berkenblit, M.D.Baltimore, MD 212871841256781
Common questions
What is Benjamin Cassin Johnson, MD's NPI number?
Benjamin Cassin Johnson, MD's National Provider Identifier (NPI) is 1497332928, issued on Mar 29, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Benjamin Cassin Johnson, MD located?
The NPPES record lists a practice address at 1800 Orleans St, Baltimore, MD, 21287. Phone: (410) 955-5000. Providers update this record themselves, so call before visiting.
How can I verify Benjamin Cassin Johnson, MD's license?
NPPES lists Maryland license number D0103076, 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 Benjamin Cassin Johnson, MD prescribe under Medicare Part D?
In 2024, Benjamin Cassin Johnson, MD had 189 Medicare Part D claims for 49 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.