YASAR AHTSHAM MD
NPI 1306536875
Internal Medicine in Rengo, RENGO
About Yasar Ahtsham Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
YASAR AHTSHAM MD (NPI 1306536875) is an individual internal medicine provider in Rengo, RENGO, licensed in Delaware (C1-0029443) and active in the NPI registry since May 2023. He is enrolled in Medicare PECOS and is a graduate of Other (2015).
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Yasar Ahtsham Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Yasar Ahtsham reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Dover, DE 19901
- Reassigned Medicare billing, Delaware enrollment
- 166 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.
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 Yasar Ahtsham's NPI number?
The NPI number for Yasar Ahtsham is 1306536875. It was assigned to this individual provider in the NPPES registry on May 9, 2023.
Where is Yasar Ahtsham located?
Yasar Ahtsham practices at Diputado Ricardo Valenzuela Saez 597 Parque Baluarte, Region Libertador Bernardo Ohiggins, Rengo, RENGO 29400. The listed phone number is (005) 694-9929.
What is Yasar Ahtsham's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Yasar Ahtsham enrolled in Medicare?
Yes. Yasar Ahtsham is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Yasar Ahtsham's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Yasar Ahtsham reassigns Medicare benefits to Apogee Medical Group, Delaware, Inc (Dover, DE). The 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 Yasar Ahtsham'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 Yasar Ahtsham was last updated on July 15, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.
# Yasar Ahtsham, MD · NPI 1306536875
Internal Medicine physician in Rengo, RENGO. Individual provider, active in the CMS NPPES registry since May 9, 2023.
## Identity
- **NPI:** 1306536875 (Entity type: Individual)
- **Enumerated:** May 9, 2023
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** C1-0029443 (Delaware)
- **Sole proprietor:** No
## Practice location
- **Address:** DIPUTADO RICARDO VALENZUELA SAEZ 597, PARQUE BALUARTE, REGION LIBERTADOR BERNARDO OHIGGINS, Rengo, RENGO 29400
- **Phone:** (005) 694-9929
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Apogee Medical Group, Delaware, Inc (NPI 1326485285, Dover, DE), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2015
## Record status
- **NPPES last updated:** July 15, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1306536875) · Data from the CMS NPPES public registry.