Elizabeth Halloran, M.D.
NPI 1275501900 · Internal Medicine Physician · Baltimore, MD
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Elizabeth Halloran, M.D. is a Internal Medicine Physician provider in Baltimore, MD (NPI 1275501900).
Provider details
- NPI number
- 1275501900
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- D0051135 (MD)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 105 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 777 | 287 |
| Amlodipine Besylate | 509 | 188 |
| Lisinopril | 296 | 108 |
| Losartan Potassium | 233 | 90 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 208 | 90 |
| Gabapentin | 195 | 80 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-03-09
- Last updated
- 2021-06-30
- Certified
- 2021-06-30
Frequently asked questions
- What is Elizabeth Halloran's NPI number?
- Elizabeth Halloran's National Provider Identifier (NPI) is 1275501900, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Elizabeth Halloran's specialty?
- Elizabeth Halloran is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Elizabeth Halloran located?
- Elizabeth Halloran's practice location on file with NPPES is 1501 Mount Royal Ave, Baltimore, MD 21217.
- What is Elizabeth Halloran's phone number?
- The practice phone number listed in the NPPES registry for Elizabeth Halloran is (410) 225-8855.
- Does Elizabeth Halloran accept Medicare?
- Elizabeth Halloran is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Elizabeth Halloran's NPI active?
- Yes — Elizabeth Halloran's NPI (1275501900) is active in the NPPES registry as of the last update on 2021-06-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.