KEN ZAFREN MD
NPI 1366466120
Emergency Medicine in Stanford, CA

Active since July 26, 2006PECOS EnrolledAccepts Medicare Assignment
87.09/100
CMS Quality Rating
300 PASTEUR DR, STANFORD, CA 94305(650) 723-0000 Get Directions Write a Review

NPPES record last updated: March 21, 2024. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Ken Zafren Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

KEN ZAFREN MD (NPI 1366466120) is an individual emergency medicine provider in Stanford, California, licensed in California (G70948) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS, maintains a secondary practice location in Anchorage, and is a graduate of University Of Washington School Of Medicine (1984).

NPPES Registry Identity

NPI1366466120
Entity TypeIndividualMale
Primary Taxonomy207P00000X
Provider Legal NameKEN ZAFRENCredential: MD
Location Address300 PASTEUR DRStanford, CA 94305-2200
Mailing Address300 Pasteur DrStanford, CA 94305-2200 · (650) 723-0000
Sole ProprietorNo
Medical School CMSUniversity Of Washington School Of MedicineGraduated 1984
Enumeration DateJuly 26, 2006
Last NPPES UpdateMarch 21, 2024
NPPES CertifiedMarch 21, 2024
NPI 1366466120 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
Licenses Licensed in CA · G70948 Licensed in AK · 2181
Definition
An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.
300 PASTEUR DR, Stanford, CA 94305

Secondary Practice Location 1

Location 14315 Diplomacy DrAnchorage, AK 99508-5926 · Phone (907) 729-1729 · Fax (907) 729-1759

Other Identifiers 1

MedicaidMD21813AK

Accepted Insurance

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

Enrolled in Medicare and accepts Medicare assignment

Ken Zafren Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID749185924
PECOS Enrollment IDI20090513000509
Eligible to Order & Refer Part B Labs & Imaging Durable Medical Equipment Home Health Agency Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 3

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Emergency department visit with high level of medical decision making 99285
An emergency department visit for severe conditions is when you urgently seek medical help due to serious health issues. These could be severe injuries, breathing problems, unbearable pain, or sudden severe illness. Doctors and nurses will provide immediate care to stabilize your condition.
79 services79 patients
Critical care, first 30-74 minutes 99291
Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.
39 services39 patients
Ultrasound of heart, follow-up 93308
A follow-up ultrasound of the heart, also known as an echocardiogram, is a non-invasive test that uses sound waves to create images of your heart. It helps doctors monitor your heart's function and structures after initial assessment or treatment.
14 services14 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94305 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$106.47 typical visit price
range $70.37 – $206.04
Typical copayment $26.61 (range $17.59 – $51.51)
Most-billed visit code 99203
Established Patient
$121.77 typical visit price
range $23.96 – $169.60
Typical copayment $30.44 (range $5.99 – $42.40)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

87.09/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality77.43
Promoting Interoperability100
Improvement Activities40
Cost62.86

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

Internal Medicine (Gastroenterology)
300 PASTEUR DR, ALWAY BUILD M211, MC 5187
STANFORD, CA 94305
Radiology (Vascular & Interventional Radiology)
300 PASTEUR DR
STANFORD, CA 94305
Psychiatry & Neurology (Psychiatry)
300 PASTEUR DR
STANFORD, CA 94305
Radiology (Diagnostic Radiology)
300 PASTEUR DR
STANFORD, CA 94305
Nurse Practitioner
300 PASTEUR DR
STANFORD, CA 94305
Neurological Surgery
300 PASTEUR DR
STANFORD, CA 94305
Pathology (Anatomic Pathology & Clinical Pathology)
300 PASTEUR DR, LANE 235
STANFORD, CA 94305
Internal Medicine (Critical Care Medicine)
300 PASTEUR DR
STANFORD, CA 94305

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Ken Zafren's NPI number?

The NPI number for Ken Zafren is 1366466120. It was assigned to this individual provider in the NPPES registry on July 26, 2006.

Where is Ken Zafren located?

Ken Zafren practices at 300 Pasteur Dr, Stanford, CA 94305. The listed phone number is (650) 723-0000.

What is Ken Zafren's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Is Ken Zafren enrolled in Medicare?

Yes. Ken Zafren is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does Ken Zafren accept?

Health plans from Moda Health Plan, Inc. list Ken Zafren as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Ken Zafren was last updated on March 21, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.