Margaret Hallahan, D.O.
NPI 1972818540 · Hospice and Palliative Medicine (Internal Medicine) Physician · Huntingdon, PA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Margaret Hallahan, D.O. is a Hospice and Palliative Medicine (Internal Medicine) Physician provider in Huntingdon, PA (NPI 1972818540).
Provider details
- NPI number
- 1972818540
- Entity type
- Individual
- Primary specialty
- Hospice and Palliative Medicine (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Female
- Sole proprietor
- Yes
- License
- OS016316 (PA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
15 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
688 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) |
|---|---|---|
| Subsequent Nursing Facility Care With Straightforward Level of Medical Decision Making, Per Day, If Using Time, 20 Minutes Or More99308 | 219 | $66 |
| Subsequent Nursing Facility Care With Straightforward Level of Medical Decision Making, Per Day, If Using Time, at Least 10 Minutes99307 | 205 | $36 |
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 133 | $95 |
| Initial Nursing Facility Care With High Level of Medical Decision Making, Per Day, If Using Time, 50 Minutes Or More99306 | 49 | $160 |
| Subsequent Nursing Facility Care With High Level of Medical Decision Making, Per Day, If Using Time, at Least 45 Minutes99310 | 45 | $135 |
| Initial Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 35 Minutes |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 211 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 751 | 107 |
| Levothyroxine Sodium | 550 | 69 |
| Gabapentin | 477 | 71 |
| Furosemide | 469 | 83 |
| Pantoprazole Sodium | 449 | 71 |
| Metoprolol Succinate | 384 | 54 |
| Sertraline Hcl | 361 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$34 across 1 record (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
- 2010-08-08
- Last updated
- 2018-05-07
Frequently asked questions
- What is Margaret Hallahan's NPI number?
- Margaret Hallahan's National Provider Identifier (NPI) is 1972818540, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Margaret Hallahan's specialty?
- Margaret Hallahan is listed in the NPPES registry with a primary specialty of Hospice and Palliative Medicine (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Margaret Hallahan located?
- Margaret Hallahan's practice location on file with NPPES is 1225 Warm Springs Ave, Huntingdon, PA 16652-2350.
- What is Margaret Hallahan's phone number?
- The practice phone number listed in the NPPES registry for Margaret Hallahan is (814) 643-2290.
- Does Margaret Hallahan accept Medicare?
- Margaret Hallahan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Margaret Hallahan's NPI active?
- Yes — Margaret Hallahan's NPI (1972818540) is active in the NPPES registry as of the last update on 2018-05-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.