Doctor profile · Federal record
Dr. Ken Zafren, MD
Emergency Medicine Physician (CMS: Emergency Medicine) · Emergency Medicine Physician · Stanford, CA
- NPI 1366466120
- Accepts Medicare
- MIPS 75.5 / 100 · 2023
- 42 yrs in practice
- Licensed in 2 states
- Male
- Group practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
300 Pasteur Dr
Stanford, CA 943052200
(650) 723-0000 - Additional location
-
4315 Diplomacy Dr
Anchorage, AK 995085926
(907) 729-1729
fax (907) 729-1759
Credentials & registration
- NPI registered
- July 2006 — 20 yrs on file
- Profile last updated
- March 21, 2024
- Year of graduation
- 1984 — 42 yrs since
- Specialty taxonomy
- 207P00000X — NUCC code
- State licenses (2)
- California #G70948 · Alaska #2181
- Medicaid
- AK #MD21813
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1366466120. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
121
Distinct HCPCS
3
Medicare allowed
$22,348
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99285 |
Emergency department visit with high level of medical decision making | 64 | 64 | $194 | |
99284 |
Emergency department visit with moderate level of medical decision making | 35 | 35 | $133 | |
99291 |
Critical care, first 30-74 minutes | 22 | 22 | $240 |
In context: peer comparison
Among 60 peers in Stanford Emergency Medicine Physician, average services per provider: 60. This provider delivers 2.0× the peer median.Hospital affiliations
Frequently asked questions
What is Dr. Ken Zafren's medical specialty?
Dr. Ken Zafren practices Emergency Medicine Physician in Stanford, CA.
Where does Dr. Ken Zafren practice?
Dr. Ken Zafren practices at 300 Pasteur Dr, Stanford, CA 943052200. Office phone: 6507230000.
What is Dr. Ken Zafren's NPI?
Dr. Ken Zafren's National Provider Identifier (NPI) is 1366466120, issued by NPPES.
Does Dr. Ken Zafren accept Medicare assignment?
Yes. Dr. Ken Zafren accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Ken Zafren commonly perform?
Top Medicare-reported procedures in 2023: Emergency department visit with high level of medical decision making (HCPCS 99285); Emergency department visit with moderate level of medical decision making (HCPCS 99284); Critical care (HCPCS 99291). Source: CMS Medicare Physician & Other Practitioners file.