Demetrios Mallios, MD
NPI 1144763095 · Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · Los Angeles, CA
Enrolled with Medicare as Practitioner - Cardiac Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Demetrios Mallios, MD is a Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician provider in Los Angeles, CA (NPI 1144763095).
Provider details
- NPI number
- 1144763095
- Entity type
- Individual
- Primary specialty
- Thoracic Surgery (Cardiothoracic Vascular Surgery) PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 146158 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
9 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$443 across 4 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2016-11-27
- Last updated
- 2016-11-27
Frequently asked questions
- What is Demetrios Mallios's NPI number?
- Demetrios Mallios's National Provider Identifier (NPI) is 1144763095, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Demetrios Mallios's specialty?
- Demetrios Mallios is listed in the NPPES registry with a primary specialty of Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician (Allopathic & Osteopathic Physicians).
- Where is Demetrios Mallios located?
- Demetrios Mallios's practice location on file with NPPES is 1520 San Pablo St, Los Angeles, CA 90033-5310.
- What is Demetrios Mallios's phone number?
- The practice phone number listed in the NPPES registry for Demetrios Mallios is (323) 442-5849.
- Does Demetrios Mallios accept Medicare?
- Demetrios Mallios is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Demetrios Mallios's NPI active?
- Yes — Demetrios Mallios's NPI (1144763095) is active in the NPPES registry as of the last update on 2016-11-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.