What is Mark Ostrem's specialty?

Mark Ostrem (NPI 1811985633) is a Medicare-billing provider whose primary specialty is Internal Medicine in Quincy, MA.

Where does Mark Ostrem practice?

Mark Ostrem practices in Quincy, MA, based on the location reported in the CMS Medicare provider datasets for NPI 1811985633.

How much does Medicare pay Mark Ostrem?

Mark Ostrem (NPI 1811985633) received approximately $169K in total Medicare Part B payments, serving 215 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1811985633

Mark OstremMD

Internal MedicineQuincy, MAI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

711

Unique beneficiaries

—

Total services

2,002

Distinct HCPCS

Medicare payment

$166K

Peer benchmark

Total Medicare services vs. 3,978 Internal Medicine providers in MA — top quintile (cohort median 564).

PRESCRIBING · PART D · 2024

Total Rx claims

15,841

Beneficiaries

—

Total drug cost

$2.1M

Distinct drugs

201

Brand share

23.5%

Top prescribed drugs

Trazodone Hcl793 claims

Atorvastatin Calcium716 claims

Apixaban514 claims

Gabapentin495 claims

Baclofen435 claims

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

Total received

$199

Payment records

By payment type

Food and Beverage$199

Top paying entities

Food and Beverage$199

REFERRAL NETWORK

Where Mark Ostrem'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). 43 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
STEWARD CARNEY HOSPITAL, INC.	221	2,516
FALLON SERVICE, INC.	98	1,456
Quest Diagnostics Massachusetts Llc Clinical Laboratory · Marlborough, MA	92	612
ALLIANCE HEALTH OF QUINCY, INC.	91	952
Michele Eldredge Nurse Practitioner · Hyannis, MA	82	2,107
Alexander Feinstein Diagnostic Radiology · Boston, MA	80	475
Shadi Abboud Podiatry · Framingham, MA	76	343
Jose Varghese Diagnostic Radiology · Boston, MA	70	466
Richard Herman Diagnostic Radiology · Boston, MA	60	368
Shaohua Deng Nurse Practitioner · Quincy, MA	50	599
Cyllene Saintelien Nurse Practitioner · Plymouth, MA	41	230
CARR, STEVEN	41	511

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