PROVIDER PROFILE · NPI 1881652998

William KarnesMD

Internal MedicineOrange, CAI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

811

Unique beneficiaries

—

Total services

827

Distinct HCPCS

Medicare payment

$106K

Peer benchmark

Total Medicare services vs. 10,499 Internal Medicine providers in CA — above median (cohort median 531).

PRESCRIBING · PART D · 2024

Total Rx claims

1,151

Beneficiaries

—

Total drug cost

$246K

Distinct drugs

Brand share

47.3%

Top prescribed drugs

Sodium Chloride/Nahco3/Kcl/Peg309 claims

Omeprazole243 claims

Pantoprazole Sodium133 claims

Famotidine131 claims

Linaclotide77 claims

QUALITY · MIPS · 2024

Final MIPS score

100.0

Quality

83.7

Cost

0.0

Improvement activities

40.0

Promoting interop.

100.0

Payment adjustment

1.05%

APM Entity

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024

No data available for this provider in 2024.

REFERRAL NETWORK

Where William Karnes'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). 12 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
WU, MARK L	62	144
Byron J Allen Internal Medicine · Orange, CA	51	233
Unilab Corporation Clinical Laboratory · West Hills, CA	39	1,084
Teferi Mitiku Internal Medicine · Orange, CA	26	109
John Lee Gastroenterology · Orange, CA	23	84
Pranav Patel Cardiology · Orange, CA	23	70
NPI 1093895666	20	70
Kevin Harley Nephrology · Orange, CA	17	147
Joseph Burns Diagnostic Radiology · Santa Barbara, CA	14	44
Marisa Tseng Diagnostic Radiology · Duarte, CA	14	39
Alpesh Amin Internal Medicine · Orange, CA	12	45
Mayil Krishnam Diagnostic Radiology · Stanford, CA	11	21

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