ALAA ALTAHAN
NPI 1952757684
Internal Medicine - Hematology & Oncology in San Jose, CA
About Alaa Altahan NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ALAA ALTAHAN (NPI 1952757684) is an individual hematology & oncology provider in San Jose, California, licensed in California (A180251) and active in the NPI registry since May 2016. He is enrolled in Medicare PECOS, is affiliated with Regional One Health, and maintains 2 additional practice locations.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Locations 2
Accepted Insurance
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
Alaa Altahan 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
3Medicare enrollment records show Alaa Altahan reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Santa Clara, CA 95051
- Reassigned Medicare billing, California enrollment
- 20,078 clinicians in this Medicare group
Memphis, TN 38103
- Reassigned Medicare billing, Tennessee enrollment
- 421 clinicians in this Medicare group
Oak Ridge, TN 37830
- Reassigned Medicare billing, Tennessee enrollment
- 1,085 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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Regional One Health
Acute Care Hospitals · Memphis, TNPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 95119 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SAN JOSE, CA 95119
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 Alaa Altahan's NPI number?
The NPI number for Alaa Altahan is 1952757684. It was assigned to this individual provider in the NPPES registry on May 12, 2016.
Where is Alaa Altahan located?
Alaa Altahan practices at 270 International Cir, San Jose, CA 95119. The listed phone number is (408) 972-6560.
What is Alaa Altahan's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.
Is Alaa Altahan enrolled in Medicare?
Yes. Alaa Altahan 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 Alaa Altahan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Alaa Altahan reassigns Medicare benefits to 3 organizations: Permanente Medical Group Inc (Santa Clara, CA), Ut Regional One Physicians Inc (Memphis, TN) and Southeastern Physician Services PC (Oak Ridge, TN). 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 Alaa Altahan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Alaa Altahan accept?
Health plans from BlueCross BlueShield of Tennessee and Oscar Insurance Company list Alaa Altahan as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Alaa Altahan affiliated with any hospitals?
According to CMS data, Alaa Altahan is affiliated with Regional One Health.
When was this NPI record last updated?
The NPPES record for Alaa Altahan was last updated on June 29, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Alaa Altahan · NPI 1952757684
Hematology & Oncology physician in San Jose, California. Individual provider, active in the CMS NPPES registry since May 12, 2016.
## Identity
- **NPI:** 1952757684 (Entity type: Individual)
- **Enumerated:** May 12, 2016
- **Primary specialty:** Internal Medicine - Hematology & Oncology · taxonomy 207RH0003X
- **State license:** A180251 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 270 INTERNATIONAL CIR, San Jose, CA 95119-1130
- **Phone:** (408) 972-6560
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): Permanente Medical Group Inc (NPI 1073606299, Santa Clara, CA); Ut Regional One Physicians Inc (NPI 1093130585, Memphis, TN); Southeastern Physician Services PC (NPI 1083835441, Oak Ridge, TN) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2011
## Record status
- **NPPES last updated:** June 29, 2026
---
Source: [NPI Profile](https://npiprofile.com/npi/1952757684) · Data from the CMS NPPES public registry.