What is Mark Nishiyama's specialty?

Mark Nishiyama (NPI 1033279849) is a Medicare-billing provider whose primary specialty is Obstetrics & Gynecology in Centralia, WA.

Where does Mark Nishiyama practice?

Mark Nishiyama practices in Centralia, WA, based on the location reported in the CMS Medicare provider datasets for NPI 1033279849.

How much does Medicare pay Mark Nishiyama?

Mark Nishiyama (NPI 1033279849) received approximately $13K in total Medicare Part B payments, serving 80 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1033279849

Mark NishiyamaMD

PRACTICEPROVIDENCE HEALTH & SERVICES - WASHINGTONSee all providers at this practice →

Obstetrics & GynecologyCentralia, WAI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

107

Unique beneficiaries

—

Total services

153

Distinct HCPCS

Medicare payment

$7K

Peer benchmark

Total Medicare services vs. 342 Obstetrics & Gynecology providers in WA — top quintile (cohort median 59).

PRESCRIBING · PART D · 2024

Total Rx claims

142

Beneficiaries

—

Total drug cost

$9K

Distinct drugs

Brand share

38.0%

Top prescribed drugs

Estradiol44 claims

Norethindrone22 claims

Misoprostol21 claims

Progesterone, Micronized20 claims

Clobetasol Propionate12 claims

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

Total received

$104

Payment records

By payment type

Food and Beverage$104

Top paying entities

Food and Beverage$104

FACILITY AFFILIATIONS

Hospital & Facility Affiliations (1)

CCN 500019

Hospital

REFERRAL NETWORK

Where Mark Nishiyama'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). 2 inbound referrers · 6 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
PROVIDENCE HEALTH & SERVICES WASHINGTON	44	582
Cellnetix Labs, Llc Clinical Laboratory · Tukwila, WA	17	37

Refers patients to

Outbound — where patients go next

Physician	Patients	Visits
PROVIDENCE HEALTH & SERVICES WASHINGTON	55	757
CHAN, TERENCE	27	104
Cellnetix Labs, Llc Clinical Laboratory · Tukwila, WA	26	50
Mehdi Rohany Diagnostic Radiology · Lynnwood, WA	16	91
ODELL, JAY	14	52
John Edwards Diagnostic Radiology · Olympia, WA	11	27

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