Dr. Ken Zafren, MD

Dr. Zafren practices at Stanford Hospital at 300 Pasteur Drive in Stanford, California, part of Stanford University.

Dr. Zafren's NPI, 1366466120, was assigned on July 26, 2006. Dr. Zafren graduated from University Of Washington School Of Medicine in 1984. Dr. Zafren holds California license G70948.

Dr. Zafren's primary practice is Stanford Hospital at 300 Pasteur Drive, at 300 Pasteur Drive, Stanford, CA 94305 in Santa Clara County. The practice phone is (650) 723-4000.

Dr. Zafren's primary practice is Stanford Hospital at 300 Pasteur Drive in Stanford, California, part of Stanford University. Dr. Zafren is also affiliated with Alaska Native Medical Center. The medical group on file is Stanford Health Care. Dmand AI also links Dr. Zafren to 1 more hospital, 2 medical groups and 1 physician office, each named with a free account. Dr. Zafren's employer is on file too: a hospital.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Zafren practices, 4 sites in all. Vendor and product names are available with a free account.

Emergency medicine is Dr. Zafren's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Zafren is board certified in emergency medicine by the American Board of Emergency Medicine. Dmand AI has Dr. Zafren's licenses on file in 2 states: California and Alaska.

CMS data shows 132 Medicare services from Dr. Zafren across 3 procedure codes in 2024, for 132 Medicare patients. Medicare paid $18,646 for them. Every service was in a facility, such as a hospital, rather than an office.

CMS counts 132 Medicare patients who saw Dr. Zafren in 2024. The largest group is 75 to 84, with 46 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 35% are also on Medicaid. Their average risk score is 2.17, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.

Across all payers, Dmand AI patient panel data puts Dr. Zafren's median patient age at 55, with 54% women.

In 2024, Dr. Zafren wrote 50 Medicare Part D claims. 100% of them were for generic drugs. CMS names the drug for 12 of them, across 1 drug with 11 or more claims each, at $47 in total drug cost.

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 91 out of 100 for Dr. Zafren for performance year 2024, reported as part of a group. Dr. Zafren accepts Medicare assignment, so Medicare's approved amount is taken as full payment.

Dmand AI links 104 papers to Dr. Zafren, published from 2010 to 2024. 2023 was the busiest year, with 11. The most frequent topics are Mountaineering, Altitude Sickness and Hypothermia. Dr. Zafren has published most often in Wilderness Environ Med. Dr. Zafren's most frequent co-authors are Peter Hackett, MD, Robert Brown Schoene, MD and Daniel F. Danzl, MD.

CMS Open Payments shows 3 general payments to Dr. Zafren from 1 drug or device company in 2025. Consulting fees make up the largest share, 100% of the total. BTG International, Inc. paid the most, $9,000.

Dmand AI lists 3 awards for Dr. Zafren.

Dr. Zafren graduated from University Of Washington School Of Medicine in 1984. Dr. Zafren is a member of AAEM, ACEP, international Commission of Mountain Emergency Medicine ICAR MedCom, International Society of Mountain Medicine ISMM, international Society of Travel Medicine ISTM and National Association of EMS Physicians NAEMSP.

Dr. Zafren is in network with 3 carriers, including United Healthcare, AK State Medicaid and CMS Medicare. Medicare plans come from the most carriers, 2. Check the plan with the practice before a visit.