BENJAMIN CASSIN JOHNSON MD
NPI 1497332928
Internal Medicine in Baltimore, MD
About Benjamin Cassin Johnson Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
BENJAMIN CASSIN JOHNSON MD (NPI 1497332928) is an individual internal medicine provider in Baltimore, Maryland, licensed in Maryland (D0103076) and active in the NPI registry since March 2021. He is enrolled in Medicare PECOS, is affiliated with Johns Hopkins Hospital, The, and is a graduate of Perelman School Of Med At The University Of Pennsylvania (2021).
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Benjamin Cassin Johnson Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show Benjamin Johnson reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Baltimore, MD 21205
- Reassigned Medicare billing, Maryland enrollment
- 4,483 clinicians in this Medicare group
Baltimore, MD 21224
- Reassigned Medicare billing, Maryland enrollment
- Medicare enrollment name: Baltimore Medical System, Inc.
- 243 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Johns Hopkins Hospital, The
Acute Care Hospitals · Baltimore, MDPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 21287 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
BALTIMORE, MD 21287
BALTIMORE, MD 21287
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Benjamin Johnson's NPI number?
The NPI number for Benjamin Johnson is 1497332928. It was assigned to this individual provider in the NPPES registry on March 29, 2021.
Where is Benjamin Johnson located?
Benjamin Johnson practices at 1800 Orleans St, Baltimore, MD 21287. The listed phone number is (410) 955-5000.
What is Benjamin Johnson's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Benjamin Johnson enrolled in Medicare?
Yes. Benjamin Johnson is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Benjamin Johnson's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Benjamin Johnson reassigns Medicare benefits to 2 organizations: Johns Hopkins University (Baltimore, MD) and Baltimore Medical Systems, Inc. (Baltimore, MD). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Benjamin Johnson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Benjamin Johnson affiliated with any hospitals?
According to CMS data, Benjamin Johnson is affiliated with Johns Hopkins Hospital, The.
When was this NPI record last updated?
The NPPES record for Benjamin Johnson was last updated on March 18, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Benjamin Cassin Johnson, MD · NPI 1497332928
Internal Medicine physician in Baltimore, Maryland. Individual provider, active in the CMS NPPES registry since March 29, 2021.
## Identity
- **NPI:** 1497332928 (Entity type: Individual)
- **Enumerated:** March 29, 2021
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** D0103076 (Maryland)
- **Sole proprietor:** No
## Practice location
- **Address:** 1800 ORLEANS ST, Baltimore, MD 21287-0010
- **Phone:** (410) 955-5000
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Johns Hopkins University (NPI 1033190442, Baltimore, MD); Baltimore Medical Systems, Inc. (NPI 1164138152, Baltimore, MD) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Perelman School Of Med At The University Of Pennsylvania, class of 2021
## Record status
- **NPPES last updated:** March 18, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1497332928) · Data from the CMS NPPES public registry.