What is Harold Van Lonkhuyzen's specialty?

Harold Van Lonkhuyzen (NPI 1568576403) is a Medicare-billing provider whose primary specialty is Psychiatry in Rockland, ME.

Where does Harold Van Lonkhuyzen practice?

Harold Van Lonkhuyzen practices in Rockland, ME, based on the location reported in the CMS Medicare provider datasets for NPI 1568576403.

How much does Medicare pay Harold Van Lonkhuyzen?

Harold Van Lonkhuyzen (NPI 1568576403) received approximately $20K in total Medicare Part B payments, serving 68 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1568576403

Harold Van LonkhuyzenMD

PsychiatryRockland, MEI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

Unique beneficiaries

—

Total services

164

Distinct HCPCS

Medicare payment

$15K

Peer benchmark

Total Medicare services vs. 124 Psychiatry providers in ME — above median (cohort median 145).

PRESCRIBING · PART D · 2024

Total Rx claims

1,669

Beneficiaries

—

Total drug cost

$42K

Distinct drugs

Brand share

16.6%

Top prescribed drugs

Quetiapine Fumarate173 claims

Sertraline Hcl150 claims

Lamotrigine132 claims

Risperidone107 claims

Venlafaxine Hcl102 claims

QUALITY · MIPS · 2024

Final MIPS score

97.9

Quality

83.3

Cost

0.0

Improvement activities

40.0

Promoting interop.

100.0

Payment adjustment

0.97%

APM Entity

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

No data available for this provider in 2025.

REFERRAL NETWORK

Where Harold Van Lonkhuyzen'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 · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
Charles Mullen Diagnostic Radiology · Damariscotta, ME	19	37
Harold Amsel Psychiatry · Ellsworth, ME	16	32
Robert Stein Neurology · Belfast, ME	12	74
NPI 1124085741	11	20
ISNARDI, PATTI	11	22
Christopher Gelwix Cardiology · Scarborough, ME	11	37

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