What is Ken Zafren's specialty?

Ken Zafren (NPI 1366466120) is a Medicare-billing provider whose primary specialty is Emergency Medicine in Stanford, CA.

Where does Ken Zafren practice?

Ken Zafren practices in Stanford, CA, based on the location reported in the CMS Medicare provider datasets for NPI 1366466120.

How much does Medicare pay Ken Zafren?

Ken Zafren (NPI 1366466120) received approximately $21K in total Medicare Part B payments, serving 132 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1366466120

Ken ZafrenMD

PRACTICESTANFORD HEALTH CARESee all providers at this practice →

Emergency MedicineStanford, CAI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

132

Unique beneficiaries

—

Total services

132

Distinct HCPCS

Medicare payment

$19K

Peer benchmark

Total Medicare services vs. 5,287 Emergency Medicine providers in CA — below median (cohort median 355).

PRESCRIBING · PART D · 2024

No data available for this provider in 2024.

QUALITY · MIPS · 2024

Final MIPS score

88.5

Quality

87.1

Cost

69.5

Improvement activities

40.0

Promoting interop.

100.0

Payment adjustment

0.57%

Group

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

Total received

$9K

Payment records

By payment type

Consulting Fee$9K

Top paying entities

Consulting Fee$9K

REFERRAL NETWORK

Where Ken Zafren'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). 2 inbound referrers · 15 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
Jon Keller Pathology · Palo Alto, CA	26	85
HERFKENS, ROBERT	16	20

Refers patients to

Outbound — where patients go next

Physician	Patients	Visits
STANFORD HEALTH CARE	127	395
Joshua Spin Cardiology · Stanford, CA	30	53
Francis Koch Cardiology · Stanford, CA	27	43
FEDERLE, MICHAEL	22	31
American Medical Response West Ambulance Service Provider · Burlingame, CA	21	39
City Of Palo Alto Ambulance Service Provider · Palo Alto, CA	17	26
DESSER, TERRY	17	24
Haiwei Guo Diagnostic Radiology · Stanford, CA	16	36
Ingela Schnittger Cardiology · Stanford, CA	16	22
Michael Zeineh Diagnostic Radiology · Stanford, CA	16	23
Ann Leung Diagnostic Radiology · Stanford, CA	14	26
Protransport 1 Ambulance Service Provider · Rohnert Park, CA	14	18

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