Robert Liddell, M.D.
NPI 1972553022 · Vascular & Interventional Radiology Physician · Baltimore, MD
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Robert Liddell, M.D. is a Vascular & Interventional Radiology Physician provider in Baltimore, MD (NPI 1972553022).
Provider details
- NPI number
- 1972553022
- Entity type
- Individual
- Primary specialty
- Vascular & Interventional Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- D64077 (MD)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
589 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Use of a Drug to Induce Depression of Consciousness By Physician Performing a Procedure (5 Years Or Older), Initial 15 Minutes99152 | 146 | $12 |
| Ultrasonic Guidance for Blood Vessel Access76937 | 54 | $14 |
| Review By Radiologist of Additional Artery Image75774 | 53 | $47 |
| Review By Radiologist of Abdominal Artery Image75726 | 48 | $94 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 44 | $97 |
| Insertion of Tube Into Abdominal, Pelvic, Or Leg Artery, Initial Third Order Branch36247 | 34 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$3,205 across 10 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-05-11
- Last updated
- 2007-07-08
Frequently asked questions
- What is Robert Liddell's NPI number?
- Robert Liddell's National Provider Identifier (NPI) is 1972553022, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Robert Liddell's specialty?
- Robert Liddell is listed in the NPPES registry with a primary specialty of Vascular & Interventional Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Robert Liddell located?
- Robert Liddell's practice location on file with NPPES is 600 N Wolfe St, Baltimore, MD 21287-0005.
- What is Robert Liddell's phone number?
- The practice phone number listed in the NPPES registry for Robert Liddell is (410) 614-2126.
- Does Robert Liddell accept Medicare?
- Robert Liddell is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Robert Liddell's NPI active?
- Yes — Robert Liddell's NPI (1972553022) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.