ROBERT PATRICK LIDDELL M.D.
NPI 1972553022
Radiology - Vascular & Interventional Radiology in Baltimore, MD
About Robert Patrick Liddell M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ROBERT PATRICK LIDDELL M.D. (NPI 1972553022) is an individual vascular & interventional radiology provider in Baltimore, Maryland, licensed in Maryland (D64077) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS, is affiliated with Johns Hopkins Hospital, The, and is a graduate of Other (2000).
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)
Robert Patrick Liddell M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
3Medicare enrollment records show Robert Liddell reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Baltimore, MD 21287
- Reassigned Medicare billing, Maryland enrollment
- 4,483 clinicians in this Medicare group
Baltimore, MD 21205
- Reassigned Medicare billing, District of Columbia enrollment
- 190 clinicians in this Medicare group
Baltimore, MD 21202
- Reassigned Medicare billing, Maryland enrollment
- Medicare enrollment name: St Paul Place Specialists, Inc.
- 423 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 17
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
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.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
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
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 Robert Liddell's NPI number?
The NPI number for Robert Liddell is 1972553022. It was assigned to this individual provider in the NPPES registry on May 11, 2006.
Where is Robert Liddell located?
Robert Liddell practices at 600 N Wolfe St, Baltimore, MD 21287. The listed phone number is (410) 614-2126.
What is Robert Liddell's specialty?
The primary specialty registered for this NPI is Radiology, specializing in Vascular & Interventional Radiology, with taxonomy code 2085R0204X.
Is Robert Liddell enrolled in Medicare?
Yes. Robert Liddell is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Robert Liddell's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Robert Liddell reassigns Medicare benefits to 3 organizations: Johns Hopkins University (Baltimore, MD), Johns Hopkins University (Baltimore, MD) and Saint Paul Place Specialists, 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 Robert Liddell's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Robert Liddell affiliated with any hospitals?
According to CMS data, Robert Liddell is affiliated with Johns Hopkins Hospital, The.
When was this NPI record last updated?
The NPPES record for Robert Liddell was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.
# Robert Patrick Liddell, M.D. · NPI 1972553022
Vascular & Interventional Radiology physician in Baltimore, Maryland. Individual provider, active in the CMS NPPES registry since May 11, 2006.
## Identity
- **NPI:** 1972553022 (Entity type: Individual)
- **Enumerated:** May 11, 2006
- **Primary specialty:** Radiology - Vascular & Interventional Radiology · taxonomy 2085R0204X
- **State license:** D64077 (Maryland)
- **Sole proprietor:** No
## Practice location
- **Address:** 600 N WOLFE ST, Baltimore, MD 21287-0005
- **Phone:** (410) 614-2126
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): Johns Hopkins University (NPI 1023018413, Baltimore, MD); Johns Hopkins University (NPI 1093796609, Baltimore, MD); Saint Paul Place Specialists, Inc. (NPI 1053352070, Baltimore, MD) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2000
## Record status
- **NPPES last updated:** July 8, 2007
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Source: [NPI Profile](https://npiprofile.com/npi/1972553022) · Data from the CMS NPPES public registry.