What is Thomas O'connor's specialty?

Thomas O'connor (NPI 1619066859) is a Medicare-billing provider whose primary specialty is Internal Medicine in Ann Arbor, MI.

Where does Thomas O'connor practice?

Thomas O'connor practices in Ann Arbor, MI, based on the location reported in the CMS Medicare provider datasets for NPI 1619066859.

How much does Medicare pay Thomas O'connor?

Thomas O'connor (NPI 1619066859) received approximately $10K in total Medicare Part B payments, serving 96 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1619066859

Thomas O'connorMD

PRACTICEREGENTS OF THE UNIVERSITY OF MICHIGANSee all providers at this practice →

Internal MedicineAnn Arbor, MII

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

123

Unique beneficiaries

—

Total services

137

Distinct HCPCS

Medicare payment

$9K

Peer benchmark

Total Medicare services vs. 3,459 Internal Medicine providers in MI — bottom quintile (cohort median 549).

PRESCRIBING · PART D · 2024

Total Rx claims

1,205

Beneficiaries

—

Total drug cost

$85K

Distinct drugs

Brand share

10.1%

Top prescribed drugs

Atorvastatin Calcium204 claims

Amlodipine Besylate117 claims

Lisinopril86 claims

Losartan Potassium77 claims

Levothyroxine Sodium76 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 Thomas O'connor'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). 15 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
REGENTS OF THE UNIVERSITY OF MICHIGAN	648	6,233
REGENTS OF THE UNIVERSITY OF MICHIGAN	515	2,155
Carly Marquis Henson Nurse Practitioner · Concord, NH	101	142
TERRELL, LINDA	22	50
William Armstrong Cardiology · Ann Arbor, MI	15	84
Lizabeth Binns Physician Assistant · Brighton, MI	15	70
Charisse Gencyuz Internal Medicine · Ann Arbor, MI	14	32
Stephanie Clark Internal Medicine · Ann Arbor, MI	13	65
Aine Kelly Diagnostic Radiology · Ann Arbor, MI	13	34
Jadranka Stojanovska Diagnostic Radiology · New York, NY	12	29
Mohamed Sayyouh Diagnostic Radiology · Ann Arbor, MI	12	27
FESSELL, DAVID	12	51

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