David Fagan, MD
NPI 1841220423 · Internal Medicine Physician · Plymouth, NH
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
David Fagan, MD is a Internal Medicine Physician provider in Plymouth, NH (NPI 1841220423).
Provider details
- NPI number
- 1841220423
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- NH8707 (NH)
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
19 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
1,909 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) |
|---|---|---|
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 288 | $8 |
| Hemoglobin A1c Level83036 | 285 | $10 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Tracing93005 | 199 | $6 |
| Blood Test, Clotting Time85610 | 198 | $4 |
| Blood Test, Thyroid Stimulating Hormone (tsh)84443 | 142 | $16 |
| Blood Test, Lipids (cholesterol and Triglycerides)80061 | 141 | $13 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 104 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 339 | 104 |
| Lisinopril | 271 | 77 |
| Levothyroxine Sodium | 224 | 52 |
| Amlodipine Besylate | 220 | 64 |
| Tamsulosin Hcl | 198 | 53 |
| Metformin Hcl | 192 | 46 |
| Metoprolol Succinate |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$50 across 2 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
- 2006-07-03
- Last updated
- 2010-03-26
Frequently asked questions
- What is David Fagan's NPI number?
- David Fagan's National Provider Identifier (NPI) is 1841220423, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is David Fagan's specialty?
- David Fagan is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is David Fagan located?
- David Fagan's practice location on file with NPPES is 101 Boulder Point Dr, Plymouth, NH 03264-3170.
- What is David Fagan's phone number?
- The practice phone number listed in the NPPES registry for David Fagan is (603) 536-4000.
- Does David Fagan accept Medicare?
- David Fagan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is David Fagan's NPI active?
- Yes — David Fagan's NPI (1841220423) is active in the NPPES registry as of the last update on 2010-03-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.