Joel Kahn, M.D.
NPI 1255371423 · Emergency Medicine Physician · Vallejo, CA
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Joel Kahn, M.D. is a Emergency Medicine Physician provider in Vallejo, CA (NPI 1255371423).
Provider details
- NPI number
- 1255371423
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- G48574 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
76 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 33 | $154 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 22 | $110 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 21 | $197 |
Typical Medicare-allowed amounts for these services range $110–$197 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Additional practice locations (1)
- 4053 Lone Tree WayAntioch, CA 94531-6210Phone: (925) 756-3499
Registry dates
- Enumerated
- 2006-06-07
- Last updated
- 2025-03-11
- Certified
- 2025-03-11
Frequently asked questions
- What is Joel Kahn's NPI number?
- Joel Kahn's National Provider Identifier (NPI) is 1255371423, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joel Kahn's specialty?
- Joel Kahn is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Joel Kahn located?
- Joel Kahn's practice location on file with NPPES is 300 Hospital Dr, Vallejo, CA 94589-2574.
- What is Joel Kahn's phone number?
- The practice phone number listed in the NPPES registry for Joel Kahn is (707) 554-5210.
- Does Joel Kahn accept Medicare?
- Joel Kahn is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Joel Kahn's NPI active?
- Yes — Joel Kahn's NPI (1255371423) is active in the NPPES registry as of the last update on 2025-03-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.