Peter Drennan, D.O.
NPI 1629043625 · Internal Medicine Physician · Enfield, CT
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Peter Drennan, D.O. is a Internal Medicine Physician provider in Enfield, CT (NPI 1629043625).
Provider details
- NPI number
- 1629043625
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- No
- License
- 64560 (CT)
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 tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
1,338 Medicare services, 2024 (ranked within specialty)
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 methodology.
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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 405 | $133 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 294 | $95 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 208 | $17 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 163 | $135 |
| Anticoagulant Management of Patient Taking Warfarin93793 | 109 | $12 |
| Administration of Influenza Virus Vaccine |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 115 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 517 | 132 |
| Lisinopril | 358 | 96 |
| Amlodipine Besylate | 317 | 76 |
| Rosuvastatin Calcium | 252 | 61 |
| Omeprazole | 221 | 63 |
| Levothyroxine Sodium | 136 | 31 |
| Gabapentin |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-02-22
- Last updated
- 2026-05-11
- Certified
- 2026-05-11
Frequently asked questions
- What is Peter Drennan's NPI number?
- Peter Drennan's National Provider Identifier (NPI) is 1629043625, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Peter Drennan's specialty?
- Peter Drennan is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Peter Drennan located?
- Peter Drennan's practice location on file with NPPES is 701 Enfield St, Enfield, CT 06082-2961.
- What is Peter Drennan's phone number?
- The practice phone number listed in the NPPES registry for Peter Drennan is (860) 741-6058.
- Does Peter Drennan accept Medicare?
- Peter Drennan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Peter Drennan's NPI active?
- Yes — Peter Drennan's NPI (1629043625) is active in the NPPES registry as of the last update on 2026-05-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.