What is Volney Vandalsem's specialty?

Volney Vandalsem (NPI 1689614158) is a Medicare-billing provider whose primary specialty is Diagnostic Radiology in Stanford, CA.

Where does Volney Vandalsem practice?

Volney Vandalsem practices in Stanford, CA, based on the location reported in the CMS Medicare provider datasets for NPI 1689614158.

How much does Medicare pay Volney Vandalsem?

Volney Vandalsem (NPI 1689614158) received approximately $101K in total Medicare Part B payments, serving 1,662 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1689614158

Volney VandalsemMD

PRACTICESTANFORD HEALTH CARESee all providers at this practice →

Diagnostic RadiologyStanford, CAI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

2,050

Unique beneficiaries

—

Total services

2,150

Distinct HCPCS

Medicare payment

$95K

Peer benchmark

Total Medicare services vs. 3,474 Diagnostic Radiology providers in CA — below median (cohort median 2,975).

PRESCRIBING · PART D · 2024

No data available for this provider in 2024.

QUALITY · MIPS · 2024

Final MIPS score

88.5

Quality

87.1

Cost

69.5

Improvement activities

40.0

Promoting interop.

100.0

Payment adjustment

0.57%

Group

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

No data available for this provider in 2025.

REFERRAL NETWORK

Where Volney Vandalsem'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). 108 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
Ann Leung Diagnostic Radiology · Stanford, CA	132	354
Karen Friday Cardiology · Stanford, CA	87	182
Linda Morimoto Diagnostic Radiology · Stanford, CA	85	143
Andreas Loening Diagnostic Radiology · Stanford, CA	84	130
JEFFREY, ROBERT	74	148
DESSER, TERRY	74	103
Joshua Spin Cardiology · Stanford, CA	71	111
FEDERLE, MICHAEL	67	114
Ingela Schnittger Cardiology · Stanford, CA	66	100
Zina Zarshenas Payman Diagnostic Radiology · Stanford, CA	65	95
HERFKENS, ROBERT	59	115
Sean Wu Internal Medicine · Stanford, CA	58	126

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