What is Karen Simon's specialty?

Karen Simon (NPI 1548384167) is a Medicare-billing provider whose primary specialty is Gastroenterology in Oxnard, CA.

Where does Karen Simon practice?

Karen Simon practices in Oxnard, CA, based on the location reported in the CMS Medicare provider datasets for NPI 1548384167.

How much does Medicare pay Karen Simon?

Karen Simon (NPI 1548384167) received approximately $242K in total Medicare Part B payments, serving 727 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1548384167

Karen SimonM.D.

GastroenterologyOxnard, CAI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

1,656

Unique beneficiaries

—

Total services

3,591

Distinct HCPCS

Medicare payment

$233K

Peer benchmark

Total Medicare services vs. 1,398 Gastroenterology providers in CA — top quintile (cohort median 750).

PRESCRIBING · PART D · 2024

Total Rx claims

566

Beneficiaries

—

Total drug cost

$197K

Distinct drugs

Brand share

31.1%

Top prescribed drugs

Pantoprazole Sodium95 claims

Omeprazole83 claims

Mesalamine39 claims

Dicyclomine Hcl38 claims

Diphenoxylate Hcl/Atropine36 claims

QUALITY · MIPS · 2024

Final MIPS score

100.0

Quality

20.9

Cost

75.6

Improvement activities

40.0

Promoting interop.

100.0

Payment adjustment

1.05%

Group

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

Total received

$2K

Payment records

By payment type

Food and Beverage$2K

Top paying entities

Food and Beverage$2K

REFERRAL NETWORK

Where Karen Simon'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). 81 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
Unilab Corporation Clinical Laboratory · West Hills, CA	181	547
DIGNITY HEALTH	169	402
DIGNITY HEALTH	157	406
Channel Islands Surgicenter Lp Ambulatory Surgical Center · Oxnard, CA	117	158
Sukhpreet Walia Gastroenterology · Oxnard, CA	104	309
Marlon Black Diagnostic Radiology · Santa Barbara, CA	82	201
THEURER, WILLIAM	77	166
Micha Rojany Gastroenterology · Sacramento, CA	73	173
Sean Freyne Diagnostic Radiology · Fargo, ND	69	164
William Deruso Diagnostic Radiology · Santa Barbara, CA	66	221
Nicholas Hanson Diagnostic Radiology · Salem, OR	51	99
COMMUNITY MEMORIAL HEALTH SYSTEM	50	124

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