DR. JOHN FRANCIS ZAMBETTI M.D.
NPI 1275639379
Emergency Medicine in Lancaster, CA
About Dr. John Francis Zambetti M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JOHN FRANCIS ZAMBETTI M.D. (NPI 1275639379) is an individual emergency medicine provider in Lancaster, California, licensed in California (G33362) and active in the NPI registry since September 2006. He is enrolled in Medicare PECOS and is a graduate of New York Medical College (1975).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 4
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
Dr. John Francis Zambetti 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
2Medicare enrollment records show John Zambetti reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Lancaster, CA 93534
- Reassigned Medicare billing, California enrollment
- Medicare enrollment name: High Desert Medical Corporation
- 81 clinicians in this Medicare group
West Hills, CA 91304
- Reassigned Medicare billing, California enrollment
- 205 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 12
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 93534 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.
LANCASTER, CA 93534
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 John Zambetti's NPI number?
The NPI number for John Zambetti is 1275639379. It was assigned to this individual provider in the NPPES registry on September 15, 2006.
Where is John Zambetti located?
John Zambetti practices at 43839 15th St W, Lancaster, CA 93534. The listed phone number is (661) 945-5984.
What is John Zambetti's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is John Zambetti enrolled in Medicare?
Yes. John Zambetti 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 John Zambetti's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Zambetti reassigns Medicare benefits to 2 organizations: High Desert Medical Group (Lancaster, CA) and Lakeside Medical Organization, A Medical Group Inc. (West Hills, 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 John Zambetti'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 John Zambetti was last updated on April 15, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.
# Dr. John Francis Zambetti, M.D. · NPI 1275639379
Emergency Medicine physician in Lancaster, California. Individual provider, active in the CMS NPPES registry since September 15, 2006.
## Identity
- **NPI:** 1275639379 (Entity type: Individual)
- **Enumerated:** September 15, 2006
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** G33362 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 43839 15TH ST W, Lancaster, CA 93534-4756
- **Phone:** (661) 945-5984 · **Fax:** (661) 723-6446
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): High Desert Medical Group (NPI 1720196702, Lancaster, CA); Lakeside Medical Organization, A Medical Group Inc. (NPI 1831426642, West Hills, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** New York Medical College, class of 1975
## Record status
- **NPPES last updated:** April 15, 2011
- **Other identifiers:** Medicare UPIN A45518 (CA); Medicaid 00G333620 (CA); Medicare PIN ED036Z (CA); and 1 more
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Source: [NPI Profile](https://npiprofile.com/npi/1275639379) · Data from the CMS NPPES public registry.