PROVIDER PROFILE · NPI 1528093085

John Barstis

Internal MedicineValencia, CAI

MEDICARE UTILIZATION · PART B · 2024

No data available for this provider in 2024.

PRESCRIBING · PART D · 2024

No data available for this provider in 2024.

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024

No data available for this provider in 2024.

REFERRAL NETWORK

Where John Barstis'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). 16 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
Alexander Black Hematology-Oncology · Santa Clarita, CA	74	2,378
Rena Callahan Hematology-Oncology · Valencia, CA	35	674
Richard Goldman Diagnostic Radiology · Santa Monica, CA	35	188
REGENTS OF THE UNIV OF CALIFORNIA	31	140
Unilab Corporation Clinical Laboratory · West Hills, CA	30	134
Omar Sahagun Diagnostic Radiology · Los Angeles, CA	28	187
Ian Levin Diagnostic Radiology · Los Angeles, CA	22	332
Kewang Li Pathology · Detroit, MI	20	255
Harold Quan Cardiology · Newhall, CA	20	72
GADOWSKI, DOUGLAS	19	137
Amir Rabbani Cardiology · Torrance, CA	18	276
ANTELOPE VALLEY HEALTH CARE DISTRICT	17	45

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