What is Peter Drennan's specialty?

Peter Drennan (NPI 1629043625) is a Medicare-billing provider whose primary specialty is Internal Medicine in Enfield, CT.

Where does Peter Drennan practice?

Peter Drennan practices in Enfield, CT, based on the location reported in the CMS Medicare provider datasets for NPI 1629043625.

How much does Medicare pay Peter Drennan?

Peter Drennan (NPI 1629043625) received approximately $106K in total Medicare Part B payments, serving 282 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1629043625

Peter DrennanD.O.

Internal MedicineEnfield, CTI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

888

Unique beneficiaries

—

Total services

1,405

Distinct HCPCS

Medicare payment

$99K

Peer benchmark

Total Medicare services vs. 1,650 Internal Medicine providers in CT — top quintile (cohort median 549).

PRESCRIBING · PART D · 2024

Total Rx claims

5,562

Beneficiaries

—

Total drug cost

$313K

Distinct drugs

110

Brand share

15.1%

Top prescribed drugs

Atorvastatin Calcium517 claims

Lisinopril358 claims

Amlodipine Besylate317 claims

Rosuvastatin Calcium252 claims

Omeprazole221 claims

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

No data available for this provider in 2025.

REFERRAL NETWORK

Where Peter Drennan's patients come from & go

Directional shared-patient flow from Medicare claims — who sends patients to this provider (inbound) and where this provider's patients go next (outbound). 12 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
THE MERCY HOSPITAL INC	160	531
BAYSTATE MEDICAL CENTER INC	91	275
David Mernoff Diagnostic Radiology · Springfield, MA	37	91
RAY, SUBRATA	34	76
Jeffrey Friedman Diagnostic Radiology · Springfield, MA	28	61
Rashmi Balasubramanya Diagnostic Radiology · Aldan, PA	28	61
Magdalena Nowak Physician Assistant · Springfield, MA	20	39
Gary Montano Emergency Medicine · Springfield, MA	14	28
Marc Goldman Gastroenterology · Springfield, MA	14	55
Michael Zmurko Emergency Medicine · Rutland, VT	13	33
Masih Farooqui Hematology-Oncology · Springfield, MA	11	51
NPI 1467466078	11	26

Refers patients to

Outbound — where patients go next

No outbound pairs above the suppression threshold.

Source: CMS Physician Shared Patient Patterns (30-day window, Medicare FFS). Direction = a beneficiary seen by the first provider, then the second, within 30 days; a proxy for referral, not a documented referral. Pairs with fewer than 11 shared beneficiaries are suppressed.

CROSS-REFERENCE

Related data on other Healthparse brands

ProviderScore

OIG/SAM exclusion screening, sanctions history

Healthparse Signals

Monitor this provider for changes — dated NPI change events