JOHNSON ONG DO
NPI 1568045508
Internal Medicine - Rheumatology in Loma Linda, CA
About Johnson Ong Do NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JOHNSON ONG DO (NPI 1568045508) is an individual rheumatology provider in Loma Linda, California, licensed in California (20A22465) and active in the NPI registry since April 2021. He is enrolled in Medicare PECOS, maintains a secondary practice location in Ventura, and is a graduate of Other (2021).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 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
Johnson Ong Do 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 Johnson Ong reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Loma Linda, CA 92354
- Reassigned Medicare billing, California enrollment
- 2,584 clinicians in this Medicare group
San Bernardino, CA 92408
- Reassigned Medicare billing, California enrollment
- 455 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 92354 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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 Johnson Ong's NPI number?
The NPI number for Johnson Ong is 1568045508. It was assigned to this individual provider in the NPPES registry on April 28, 2021.
Where is Johnson Ong located?
Johnson Ong practices at 11370 Anderson St # 3650, Loma Linda, CA 92354. The listed phone number is (909) 558-2860.
What is Johnson Ong's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Rheumatology, with taxonomy code 207RR0500X.
Is Johnson Ong enrolled in Medicare?
Yes. Johnson Ong 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 Johnson Ong's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Johnson Ong reassigns Medicare benefits to 2 organizations: Faculty Physicians And Surgeons Of Llusm (Loma Linda, CA) and Sac Health System (San Bernardino, 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 Johnson Ong'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 Johnson Ong was last updated on July 27, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# Johnson Ong, DO · NPI 1568045508
Rheumatology physician in Loma Linda, California. Individual provider, active in the CMS NPPES registry since April 28, 2021.
## Identity
- **NPI:** 1568045508 (Entity type: Individual)
- **Enumerated:** April 28, 2021
- **Primary specialty:** Internal Medicine - Rheumatology · taxonomy 207RR0500X
- **State license:** 20A22465 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 11370 ANDERSON ST # 3650, Loma Linda, CA 92354-3450
- **Phone:** (909) 558-2860
## 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): Faculty Physicians And Surgeons Of Llusm (NPI 1235189275, Loma Linda, CA); Sac Health System (NPI 1013935915, San Bernardino, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2021
## Record status
- **NPPES last updated:** July 27, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1568045508) · Data from the CMS NPPES public registry.