What is Jay Kim's specialty?

Jay Kim (NPI 1811984123) is a Medicare-billing provider whose primary specialty is Rheumatology in Fullerton, CA.

Where does Jay Kim practice?

Jay Kim practices in Fullerton, CA, based on the location reported in the CMS Medicare provider datasets for NPI 1811984123.

How much does Medicare pay Jay Kim?

Jay Kim (NPI 1811984123) received approximately $72K in total Medicare Part B payments, serving 342 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1811984123

Jay KimM.D.

RheumatologyFullerton, CAI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

727

Unique beneficiaries

—

Total services

1,687

Distinct HCPCS

Medicare payment

$69K

Peer benchmark

Total Medicare services vs. 530 Rheumatology providers in CA — below median (cohort median 1,833).

PRESCRIBING · PART D · 2024

Total Rx claims

2,519

Beneficiaries

—

Total drug cost

$731K

Distinct drugs

Brand share

22.9%

Top prescribed drugs

Methotrexate Sodium409 claims

Diclofenac Sodium262 claims

Prednisone216 claims

Hydroxychloroquine Sulfate202 claims

Gabapentin137 claims

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

Total received

$3K

Payment records

143

By payment type

Food and Beverage$3K

Consulting Fee$175

Top paying entities

Food and Beverage$3K

Consulting Fee$175

REFERRAL NETWORK

Where Jay Kim'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). 15 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
Victor Lee Pathology · Oceanside, CA	311	1,385
ST JUDE HOSPITAL INC	239	814
Steven Kim Hematology-Oncology · Fullerton, CA	46	489
Unilab Corporation Clinical Laboratory · West Hills, CA	42	110
Danh Nguyen Diagnostic Radiology · Riverside, CA	35	62
STAMBUK, EDGAR	34	58
UNGER, PHILLIP	31	53
Samuel Maxwell Diagnostic Radiology · Fullerton, CA	30	66
Hao Ngo Diagnostic Radiology · Fullerton, CA	26	53
Arman Forouzannia Diagnostic Radiology · Lynnwood, WA	24	48
Bradley Jackson Diagnostic Radiology · Fullerton, CA	21	40
David Park Hematology-Oncology · Fullerton, CA	19	103

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