DR. FRANCIS ISIDORO M.D.
NPI 1548328933
Nuclear Medicine - Nuclear Imaging & Therapy in Stockton, CA
About Dr. Francis Isidoro M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. FRANCIS ISIDORO M.D. (NPI 1548328933) is an individual nuclear imaging & therapy provider in Stockton, California, licensed in California (A91432) and active in the NPI registry since December 2006. He is enrolled in Medicare PECOS and is a graduate of Other (1999).
NPPES Registry Identity
Specialties & Licenses 2
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. Francis Isidoro 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
16Medicare enrollment records show Francis Isidoro reassigns Medicare billing to 16 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Stockton, CA 95204
- Reassigned Medicare billing, California enrollment
- 16 clinicians in this Medicare group
Stockton, CA 95210
- Reassigned Medicare billing, California enrollment
- 219 clinicians in this Medicare group
Modesto, CA 95350
- Reassigned Medicare billing, California enrollment
- 219 clinicians in this Medicare group
Antioch, CA 94509
- Reassigned Medicare billing, California enrollment
- 40 clinicians in this Medicare group
Pleasanton, CA 94588
- Reassigned Medicare billing, California enrollment
- 238 clinicians in this Medicare group
Walnut Creek, CA 94598
- Reassigned Medicare billing, California enrollment
- 60 clinicians in this Medicare group
Sacramento, CA 95825
- Reassigned Medicare billing, California enrollment
- 220 clinicians in this Medicare group
Santa Rosa, CA 95403
- Reassigned Medicare billing, California enrollment
- 222 clinicians in this Medicare group
Fresno, CA 93710
- Reassigned Medicare billing, California enrollment
- 232 clinicians in this Medicare group
Redding, CA 96001
- Reassigned Medicare billing, California enrollment
- 4 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 30
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 95204 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 7
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
STOCKTON, CA 95204
STOCKTON, CA 95204
STOCKTON, CA 95204
STOCKTON, CA 95204
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 Francis Isidoro's NPI number?
The NPI number for Francis Isidoro is 1548328933. It was assigned to this individual provider in the NPPES registry on December 5, 2006.
Where is Francis Isidoro located?
Francis Isidoro practices at 2320 N California St Suite 2, Stockton, CA 95204. The listed phone number is (209) 466-2000.
What is Francis Isidoro's specialty?
The primary specialty registered for this NPI is Nuclear Medicine, specializing in Nuclear Imaging & Therapy, with taxonomy code 207UN0902X.
Is Francis Isidoro enrolled in Medicare?
Yes. Francis Isidoro 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 Francis Isidoro's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Francis Isidoro reassigns Medicare benefits to 16 organizations: Stockton Hematology Oncology Medical Group, Inc (Stockton, CA), Stockton Diagnostic Imaging (Stockton, CA), Modesto Advanced Diagnostic Imaging Medical Center (Modesto, CA), Inview Imaging Diagnostics Inc A Professional Medical Corporation (Antioch, CA), Norcal Imaging (Pleasanton, CA) and 11 more organizations, listed in the Medicare section above. 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 Francis Isidoro'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 Francis Isidoro was last updated on September 11, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.
# Dr. Francis Isidoro, M.D. · NPI 1548328933
Nuclear Imaging & Therapy physician in Stockton, California. Individual provider, active in the CMS NPPES registry since December 5, 2006.
## Identity
- **NPI:** 1548328933 (Entity type: Individual)
- **Enumerated:** December 5, 2006
- **Primary specialty:** Nuclear Medicine - Nuclear Imaging & Therapy · taxonomy 207UN0902X
- **State license:** A91432 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 2320 N CALIFORNIA ST, SUITE 2, Stockton, CA 95204-5509
- **Phone:** (209) 466-2000 · **Fax:** (209) 466-2600
## 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:** 16 organizations under Medicare reassignment (form CMS-855R): Stockton Hematology Oncology Medical Group, Inc (NPI 1922175074, Stockton, CA); Stockton Diagnostic Imaging (NPI 1356538201, Stockton, CA); Modesto Advanced Diagnostic Imaging Medical Center (NPI 1730133893, Modesto, CA); Inview Imaging Diagnostics Inc A Professional Medical Corporation (NPI 1285603837, Antioch, CA); Norcal Imaging (NPI 1578687166, Pleasanton, CA); and 11 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1999
## Record status
- **NPPES last updated:** September 11, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1548328933) · Data from the CMS NPPES public registry.