Margarite Matossian
NPI 1306427646 · Internal Medicine Physician · Chicago, IL
Enrolled with Medicare as Order and Referring Only - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Margarite Matossian is a Internal Medicine Physician provider in Chicago, IL (NPI 1306427646).
Provider details
- NPI number
- 1306427646
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Sex
- Female
- Sole proprietor
- No
- License
- 125.077763 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
5 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.
$2,095 across 2 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
- 2021-04-19
- Last updated
- 2021-06-28
- Certified
- 2021-06-28
Frequently asked questions
- What is Margarite Matossian's NPI number?
- Margarite Matossian's National Provider Identifier (NPI) is 1306427646, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Margarite Matossian's specialty?
- Margarite Matossian is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Margarite Matossian located?
- Margarite Matossian's practice location on file with NPPES is 5841 S Maryland Ave, Chicago, IL 60637-1443.
- What is Margarite Matossian's phone number?
- The practice phone number listed in the NPPES registry for Margarite Matossian is (773) 702-6840.
- Does Margarite Matossian accept Medicare?
- Margarite Matossian is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Margarite Matossian's NPI active?
- Yes — Margarite Matossian's NPI (1306427646) is active in the NPPES registry as of the last update on 2021-06-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.