What is Mark Sienko's specialty?

Mark Sienko (NPI 1932146552) is a Medicare-billing provider whose primary specialty is Medical Oncology in Sequim, WA.

Where does Mark Sienko practice?

Mark Sienko practices in Sequim, WA, based on the location reported in the CMS Medicare provider datasets for NPI 1932146552.

How much does Medicare pay Mark Sienko?

Mark Sienko (NPI 1932146552) received approximately $37K in total Medicare Part B payments, serving 389 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1932146552

Mark SienkoM.D.

Medical OncologySequim, WAI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

437

Unique beneficiaries

—

Total services

574

Distinct HCPCS

Medicare payment

$36K

Peer benchmark

Total Medicare services vs. 101 Medical Oncology providers in WA — above median (cohort median 475).

PRESCRIBING · PART D · 2024

Total Rx claims

520

Beneficiaries

—

Total drug cost

$227K

Distinct drugs

Brand share

7.5%

Top prescribed drugs

Letrozole72 claims

Dexamethasone64 claims

Prednisone51 claims

Tamoxifen Citrate38 claims

Olanzapine32 claims

QUALITY · MIPS · 2024

Final MIPS score

81.8

Quality

69.4

Cost

65.2

Improvement activities

40.0

Promoting interop.

100.0

Payment adjustment

0.29%

Group

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024

Total received

$240

Payment records

By payment type

Food and Beverage$240

Top paying entities

Food and Beverage$240

REFERRAL NETWORK

Where Mark Sienko'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). 50 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
Srivalli Gopaluni Hematology-Oncology · Spokane, WA	221	3,317
PROVIDENCE HEALTH & SERVICES - WASHINGTON	128	789
PROVIDENCE HEALTH & SERVICES - WA	107	411
PROVIDENCE HEALTH & SERVICES - WASHINGTON	92	1,058
Ishwar Bhat Diagnostic Radiology · Spokane, WA	67	184
Incyte Pathology, P.S. Clinical Laboratory · Spokane Valley, WA	62	226
TEEL, GORDON	54	192
Irene Cruite Diagnostic Radiology · Spokane, WA	50	144
MULTICARE HEALTH SYSTEM	46	202
Andrea Balazs Nurse Practitioner · Spokane Valley, WA	33	266
Hematologics Inc Clinical Laboratory · Seattle, WA	33	127
Terri Lewis Diagnostic Radiology · Spokane, WA	30	97

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