ALLEN D. EFRON MD
NPI 1831277482
Neurological Surgery in Redwood City, CA
About Allen D. Efron Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ALLEN D. EFRON MD (NPI 1831277482) is an individual neurological surgery provider in Redwood City, California, licensed in California (G66809) and active in the NPI registry since November 2006. He is enrolled in Medicare PECOS and is a graduate of Stanford University School Of Medicine (1988).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Allen D. Efron 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.
Medicare Billing Reassignments
2Medicare enrollment records show Allen Efron reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Redwood City, CA 94063
- Reassigned Medicare billing, California enrollment
- 20,078 clinicians in this Medicare group
Honolulu, HI 96819
- Reassigned Medicare billing, Hawaii enrollment
- 1,187 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94063 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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.
REDWOOD CITY, CA 94063
REDWOOD CITY, CA 94063
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 Allen Efron's NPI number?
The NPI number for Allen Efron is 1831277482. It was assigned to this individual provider in the NPPES registry on November 1, 2006.
Where is Allen Efron located?
Allen Efron practices at 1150 Veterans Blvd, Redwood City, CA 94063. The listed phone number is (650) 299-2000.
What is Allen Efron's specialty?
The primary specialty registered for this NPI is Neurological Surgery with taxonomy code 207T00000X.
Is Allen Efron enrolled in Medicare?
Yes. Allen Efron 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.
Which organizations bill Medicare for Allen Efron's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Allen Efron reassigns Medicare benefits to 2 organizations: Permanente Medical Group Inc (Redwood City, CA) and Hawaii Permanente Medical Group Inc (Honolulu, HI). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Allen Efron's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Allen Efron accept?
Health plans from Kaiser Permanente list Allen Efron 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 Allen Efron was last updated on December 9, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.