TIMOTHY MARK MCMAHON
NPI 1467913442
Radiology - Diagnostic Radiology in Baltimore, MD
About Timothy Mark Mcmahon NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
TIMOTHY MARK MCMAHON (NPI 1467913442) is an individual diagnostic radiology provider in Baltimore, Maryland, licensed in Maryland (D0100466) and active in the NPI registry since March 2019. He is enrolled in Medicare PECOS, is affiliated with Meritus Medical Center, and maintains a secondary practice location in New Rochelle.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Timothy Mark Mcmahon is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show Timothy Mcmahon 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, District of Columbia enrollment
- 190 clinicians in this Medicare group
Baltimore, MD 21205
- Reassigned Medicare billing, Maryland enrollment
- 4,483 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.
Areas of Expertise CMS Part B claims 4
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 5
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Meritus Medical Center
Acute Care Hospitals · Hagerstown, MDJohns Hopkins Hospital, The
Acute Care Hospitals · Baltimore, MDTidalhealth Peninsula Regional, Inc
Acute Care Hospitals · Salisbury, MDJohns Hopkins Bayview Medical Center
Acute Care Hospitals · Baltimore, MDNorthwest Hospital Center
Acute Care Hospitals · Randallstown, MDPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 21264 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 21264
BALTIMORE, MD 21264
BALTIMORE, MD 21264
BALTIMORE, MD 21264
BALTIMORE, MD 21264
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 Timothy Mcmahon's NPI number?
The NPI number for Timothy Mcmahon is 1467913442. It was assigned to this individual provider in the NPPES registry on March 30, 2019.
Where is Timothy Mcmahon located?
Timothy Mcmahon practices at 1800 Orleans Street, Baltimore, MD 21264. The listed phone number is (410) 955-5000.
What is Timothy Mcmahon's specialty?
The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.
Is Timothy Mcmahon enrolled in Medicare?
Yes. Timothy Mcmahon is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Timothy Mcmahon's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Timothy Mcmahon reassigns Medicare benefits to 2 organizations: Johns Hopkins University (Baltimore, MD) and Johns Hopkins University (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 Timothy Mcmahon's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Timothy Mcmahon affiliated with any hospitals?
According to CMS data, Timothy Mcmahon is affiliated with Meritus Medical Center, Johns Hopkins Hospital, The, Tidalhealth Peninsula Regional, Inc, Johns Hopkins Bayview Medical Center and Northwest Hospital Center.
When was this NPI record last updated?
The NPPES record for Timothy Mcmahon was last updated on July 19, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years 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.
# Timothy Mark Mcmahon · NPI 1467913442
Diagnostic Radiology physician in Baltimore, Maryland. Individual provider, active in the CMS NPPES registry since March 30, 2019.
## Identity
- **NPI:** 1467913442 (Entity type: Individual)
- **Enumerated:** March 30, 2019
- **Primary specialty:** Radiology - Diagnostic Radiology · taxonomy 2085R0202X
- **State license:** D0100466 (Maryland)
- **Sole proprietor:** No
## Practice location
- **Address:** 1800 ORLEANS STREET, Baltimore, MD 21264-5502
- **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 1093796609, Baltimore, MD); Johns Hopkins University (NPI 1033190442, Baltimore, MD) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2019
## Record status
- **NPPES last updated:** July 19, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1467913442) · Data from the CMS NPPES public registry.