WON JO, MD, INC
NPI 1235354408
Internal Medicine - Gastroenterology in San Bernardino, CA
About Won Jo, Md, Inc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
WON JO, MD, INC (NPI 1235354408) is a healthcare organization registered as a gastroenterology in San Bernardino, California and active in the NPI registry since April 2007. The organization lists Won-seok Jo, President, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 3
Group Practice 1
Medicare Participation & PECOS CMS
Medicare enrollment, revalidation and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Won Jo, Md, Inc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Revalidation Due Date
Revalidation due by January 31, 2027
Medicare-enrolled providers and suppliers confirm their enrollment information with CMS on a set cycle, every 5 years for most and every 3 years for medical equipment suppliers. CMS sets the due date for each enrollment.
Clinicians Billing Medicare Through This Organization
Medicare enrollment records show 1 clinician reassigns Medicare billing to Won Jo, MD, Inc, which bills Medicare for the services this clinician delivers.
Clinician (1)
San Bernardino, CA 92408
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
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 Won Jo, MD, Inc's NPI number?
The NPI number for Won Jo, MD, Inc is 1235354408. It was assigned to this organization in the NPPES registry on April 14, 2007.
Where is Won Jo, MD, Inc located?
Won Jo, MD, Inc is located at 424 E Vanderbilt Way Ste B, San Bernardino, CA 92408. The listed phone number is (909) 796-0363.
What is Won Jo, MD, Inc's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.
Is Won Jo, MD, Inc enrolled in Medicare?
Yes. Won Jo, MD, Inc is registered in the Medicare PECOS enrollment system.
When is Won Jo, MD, Inc's Medicare revalidation due?
According to the CMS Revalidation Due Date List (October 2026 release), the Medicare Non-DME Part B enrollment for this organization (California, Clinic/Group Practice) is due for revalidation by January 31, 2027. Medicare providers and suppliers revalidate their enrollment every 5 years, and medical equipment suppliers every 3 years. Confirm current requirements with your Medicare Administrative Contractor.
How many clinicians bill Medicare through Won Jo, MD, Inc?
According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Gastroenterology) reassigns their Medicare billing to Won Jo, MD, Inc. A 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 the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
When was this NPI record last updated?
The NPPES record for Won Jo, MD, Inc was last updated on October 17, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.
# Won Jo, Md, Inc · NPI 1235354408
Gastroenterology organization in San Bernardino, California. Organization record, active in the CMS NPPES registry since April 14, 2007.
## Identity
- **NPI:** 1235354408 (Entity type: Organization)
- **Enumerated:** April 14, 2007
- **Primary specialty:** Internal Medicine - Gastroenterology · taxonomy 207RG0100X
- **Organization subpart:** No
- **Authorized official:** Won-Seok Jo, PRESIDENT
## Practice location
- **Address:** 424 E VANDERBILT WAY STE B, San Bernardino, CA 92408-3552
- **Phone:** (909) 796-0363 · **Fax:** (909) 255-7292
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Medicare revalidation due:** January 31, 2027 (Non-DME Part B, California, Clinic/Group Practice) · CMS Revalidation Due Date List, October 2026 release
- **Clinicians billing through this organization:** 1 clinician (Gastroenterology) reassigns Medicare billing to this organization (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** October 17, 2023
- **Other identifiers:** Other 1245215144 (CA); Other P00400295; Medicaid 00A912600 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1235354408) · Data from the CMS NPPES public registry.