RUBEN DE LOS SANTOS MD PA
NPI 1538337944
Internal Medicine in Eagle Pass, TX
About Ruben De Los Santos Md Pa NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
RUBEN DE LOS SANTOS MD PA (NPI 1538337944) is a healthcare organization registered as an internal medicine in Eagle Pass, Texas and active in the NPI registry since February 2008. The organization lists Ruben De Los Santos, Physician, 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)
Ruben De Los Santos Md Pa is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Revalidation Due Date
Revalidation due by October 31, 2026
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 Ruben De Los Santos MD PA, which bills Medicare for the services this clinician delivers.
Clinician (1)
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 Ruben De Los Santos MD PA's NPI number?
The NPI number for Ruben De Los Santos MD PA is 1538337944. It was assigned to this organization in the NPPES registry on February 19, 2008.
Where is Ruben De Los Santos MD PA located?
Ruben De Los Santos MD PA is located at 1955 E Main St, Eagle Pass, TX 78852. The listed phone number is (830) 773-7474.
What is Ruben De Los Santos MD PA's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Ruben De Los Santos MD PA enrolled in Medicare?
Yes. Ruben De Los Santos MD PA is registered in the Medicare PECOS enrollment system.
When is Ruben De Los Santos MD PA'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 (Texas, Clinic/Group Practice) is due for revalidation by October 31, 2026. 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 Ruben De Los Santos MD PA?
According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Internal Medicine) reassigns their Medicare billing to Ruben De Los Santos MD PA. 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 Ruben De Los Santos MD PA was last updated on January 14, 2009. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 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.
# Ruben De Los Santos Md Pa · NPI 1538337944
Internal Medicine organization in Eagle Pass, Texas. Organization record, active in the CMS NPPES registry since February 19, 2008.
## Identity
- **NPI:** 1538337944 (Entity type: Organization)
- **Enumerated:** February 19, 2008
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **Organization subpart:** No
- **Authorized official:** Ruben De Los Santos, PHYSICIAN
## Practice location
- **Address:** 1955 E MAIN ST, Eagle Pass, TX 78852-4714
- **Phone:** (830) 773-7474 · **Fax:** (830) 872-2659
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Medicare revalidation due:** October 31, 2026 (Non-DME Part B, Texas, Clinic/Group Practice) · CMS Revalidation Due Date List, October 2026 release
- **Clinicians billing through this organization:** 1 clinician (Internal Medicine) reassigns Medicare billing to this organization (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** January 14, 2009
- **Other identifiers:** Medicare PIN 00Z991 (TX); Medicare UPIN C18903 (TX); Medicaid 127850904 (TX)
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Source: [NPI Profile](https://npiprofile.com/npi/1538337944) · Data from the CMS NPPES public registry.