Margaret Hallowell, PA
NPI 1649465865 · Medical Physician Assistant · Patchogue, NY
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Margaret Hallowell, PA is a Medical Physician Assistant provider in Patchogue, NY (NPI 1649465865).
Provider details
- NPI number
- 1649465865
- Entity type
- Individual
- Primary specialty
- Medical Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA
- Sex
- Female
- Sole proprietor
- No
- License
- 3052-1 (NY)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
18 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
109 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 49 | $89 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 34 | $126 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 26 | $14 |
Typical Medicare-allowed amounts for these services range $14–$126 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 60 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 316 | 143 |
| Ezetimibe | 210 | 85 |
| Evolocumabbrand: Repatha Sureclick | 170 | 52 |
| Metoprolol Succinate | 158 | 73 |
| Carvedilol | 149 | 60 |
| Amlodipine Besylate | 140 | 67 |
| Rosuvastatin Calcium | 122 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$780 across 48 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
- 2007-09-11
- Last updated
- 2007-09-11
Frequently asked questions
- What is Margaret Hallowell's NPI number?
- Margaret Hallowell's National Provider Identifier (NPI) is 1649465865, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Margaret Hallowell's specialty?
- Margaret Hallowell is listed in the NPPES registry with a primary specialty of Medical Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Margaret Hallowell located?
- Margaret Hallowell's practice location on file with NPPES is 100 Hospital Road, Patchogue, NY 11772.
- What is Margaret Hallowell's phone number?
- The practice phone number listed in the NPPES registry for Margaret Hallowell is (631) 475-6900.
- Does Margaret Hallowell accept Medicare?
- Margaret Hallowell is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Margaret Hallowell's NPI active?
- Yes — Margaret Hallowell's NPI (1649465865) is active in the NPPES registry as of the last update on 2007-09-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.