What is Douglas Shumaker's specialty?

Douglas Shumaker (NPI 1225034937) is a Medicare-billing provider whose primary specialty is Internal Medicine in Portland, OR.

Where does Douglas Shumaker practice?

Douglas Shumaker practices in Portland, OR, based on the location reported in the CMS Medicare provider datasets for NPI 1225034937.

How much does Medicare pay Douglas Shumaker?

Medicare Part B utilization, prescribing (Part D), MIPS quality scores, and industry payments for Douglas Shumaker (NPI 1225034937) are detailed on this CareTrace profile.

PROVIDER PROFILE · NPI 1225034937

Douglas Shumaker

PRACTICEINNOVUS ANESTHESIA LLCSee all providers at this practice →

Internal MedicinePortland, ORI

MEDICARE UTILIZATION · PART B · 2024

No data available for this provider in 2024.

PRESCRIBING · PART D · 2024

Total Rx claims

Beneficiaries

—

Total drug cost

$453

Distinct drugs

Brand share

0.0%

Top prescribed drugs

Omeprazole15 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 Douglas Shumaker'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). 6 inbound referrers · 5 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
PROVIDENCE HEALTH & SERVICES OREGON	113	296
THE OREGON CLINIC PC	58	109
LEE, RANDALL	35	73
PROVIDENCE HEALTH & SERVICES OREGON	23	58
Steven Zinck Diagnostic Radiology · Portland, OR	12	31
Lloyd Heller Diagnostic Radiology · Portland, OR	11	19

Refers patients to

Outbound — where patients go next

Physician	Patients	Visits
PROVIDENCE HEALTH & SERVICES OREGON	55	126
PROVIDENCE HEALTH & SERVICES OREGON	19	49
Rena Apon Nurse Practitioner · Beaverton, OR	14	28
STILL, SHARON	13	21
THE OREGON CLINIC PC	11	15

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