JOEL S KAHN M.D.
NPI 1255371423
Emergency Medicine in Vallejo, CA
About Joel S Kahn M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JOEL S KAHN M.D. (NPI 1255371423) is an individual emergency medicine provider in Vallejo, California, licensed in California (G48574) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS, maintains a secondary practice location in Antioch, and is a graduate of University Of Maryland School Of Medicine (1981).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Other Identifiers 1
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
Joel S Kahn M.d. 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
5Medicare enrollment records show Joel Kahn reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Vallejo, CA 94589
- Reassigned Medicare billing, California enrollment
- 43 clinicians in this Medicare group
Concord, CA 94520
- Reassigned Medicare billing, California enrollment
- 2,323 clinicians in this Medicare group
Sonoma, CA 95476
- Reassigned Medicare billing, California enrollment
- 112 clinicians in this Medicare group
Orinda, CA 94563
- Reassigned Medicare billing, California enrollment
- 4,479 clinicians in this Medicare group
Berkeley, CA 94705
- Reassigned Medicare billing, California enrollment
- 241 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.
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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94589 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.
VALLEJO, CA 94589
VALLEJO, CA 94589
VALLEJO, CA 94589
VALLEJO, CA 94589
VALLEJO, CA 94589
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 Joel Kahn's NPI number?
The NPI number for Joel Kahn is 1255371423. It was assigned to this individual provider in the NPPES registry on June 7, 2006.
Where is Joel Kahn located?
Joel Kahn practices at 300 Hospital Dr, Vallejo, CA 94589. The listed phone number is (707) 554-5210.
What is Joel Kahn's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Joel Kahn enrolled in Medicare?
Yes. Joel Kahn 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 Joel Kahn's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Joel Kahn reassigns Medicare benefits to 5 organizations: Vallejo Emergency Physicians Medical Group Inc. (Vallejo, CA), Cep America - California (Concord, CA), Sonoma Valley Emergency Physicians Medical Group, Inc (Sonoma, CA), Sutter Bay Medical Foundation (Orinda, CA) and Carbon Health Medical Group Of California PC (Berkeley, CA). 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 Joel Kahn's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Joel Kahn was last updated on March 11, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 months 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.
# Joel S Kahn, M.D. · NPI 1255371423
Emergency Medicine physician in Vallejo, California. Individual provider, active in the CMS NPPES registry since June 7, 2006.
## Identity
- **NPI:** 1255371423 (Entity type: Individual)
- **Enumerated:** June 7, 2006
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** G48574 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 300 HOSPITAL DR, Vallejo, CA 94589-2574
- **Phone:** (707) 554-5210
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 5 organizations under Medicare reassignment (form CMS-855R): Vallejo Emergency Physicians Medical Group Inc. (NPI 1083916373, Vallejo, CA); Cep America - California (NPI 1538180807, Concord, CA); Sonoma Valley Emergency Physicians Medical Group, Inc (NPI 1710164629, Sonoma, CA); Sutter Bay Medical Foundation (NPI 1366898538, Orinda, CA); Carbon Health Medical Group Of California PC (NPI 1417294232, Berkeley, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Maryland School Of Medicine, class of 1981
## Record status
- **NPPES last updated:** March 11, 2025
- **Other identifiers:** Medicaid 00G485740 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1255371423) · Data from the CMS NPPES public registry.