DEMETRIOS NECTARIOS MALLIOS MD
NPI 1144763095
Thoracic Surgery (Cardiothoracic Vascular Surgery) in Los Angeles, CA
About Demetrios Nectarios Mallios Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DEMETRIOS NECTARIOS MALLIOS MD (NPI 1144763095) is an individual thoracic surgery (cardiothoracic vascular surgery) provider in Los Angeles, California, licensed in California (146158) and active in the NPI registry since November 2016. He is enrolled in Medicare PECOS.
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)
Demetrios Nectarios Mallios Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Demetrios Mallios reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Los Angeles, CA 90033
- Reassigned Medicare billing, California enrollment
- 2,445 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 90033 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.
LOS ANGELES, CA 90033
LOS ANGELES, CA 90033
LOS ANGELES, CA 90033
LOS ANGELES, CA 90033
LOS ANGELES, CA 90033
LOS ANGELES, CA 90033
LOS ANGELES, CA 90033
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 Demetrios Mallios's NPI number?
The NPI number for Demetrios Mallios is 1144763095. It was assigned to this individual provider in the NPPES registry on November 27, 2016.
Where is Demetrios Mallios located?
Demetrios Mallios practices at 1520 San Pablo St Health Consultation Ceneter II, Suite 4300, Los Angeles, CA 90033. The listed phone number is (323) 442-5849.
What is Demetrios Mallios's specialty?
The primary specialty registered for this NPI is Thoracic Surgery (Cardiothoracic Vascular Surgery) with taxonomy code 208G00000X.
Is Demetrios Mallios enrolled in Medicare?
Yes. Demetrios Mallios is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Demetrios Mallios's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Demetrios Mallios reassigns Medicare benefits to Usc Care Medical Group, Inc (Los Angeles, CA). 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 Demetrios Mallios'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 Demetrios Mallios was last updated on November 27, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.
# Demetrios Nectarios Mallios, MD · NPI 1144763095
Thoracic Surgery (Cardiothoracic Vascular Surgery) physician in Los Angeles, California. Individual provider, active in the CMS NPPES registry since November 27, 2016.
## Identity
- **NPI:** 1144763095 (Entity type: Individual)
- **Enumerated:** November 27, 2016
- **Primary specialty:** Thoracic Surgery (Cardiothoracic Vascular Surgery) · taxonomy 208G00000X
- **State license:** 146158 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 1520 SAN PABLO ST, HEALTH CONSULTATION CENETER II, SUITE 4300, Los Angeles, CA 90033-5310
- **Phone:** (323) 442-5849
## 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:** Usc Care Medical Group, Inc (NPI 1902846306, Los Angeles, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** November 27, 2016
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Source: [NPI Profile](https://npiprofile.com/npi/1144763095) · Data from the CMS NPPES public registry.