Natasha Diaz, MD
NPI 1659300408 · Family Medicine Physician · Chicago, IL
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Natasha Diaz, MD is a Family Medicine Physician provider in Chicago, IL (NPI 1659300408).
Provider details
- NPI number
- 1659300408
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 036-113339 (IL)
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
19 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.
$23 across 1 record (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
- 2006-07-02
- Last updated
- 2019-12-30
- Certified
- 2019-12-30
Frequently asked questions
- What is Natasha Diaz's NPI number?
- Natasha Diaz's National Provider Identifier (NPI) is 1659300408, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Natasha Diaz's specialty?
- Natasha Diaz is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Natasha Diaz located?
- Natasha Diaz's practice location on file with NPPES is 5359 W Fullerton Ave, Chicago, IL 60639-1450.
- What is Natasha Diaz's phone number?
- The practice phone number listed in the NPPES registry for Natasha Diaz is (773) 836-2785.
- Does Natasha Diaz accept Medicare?
- Natasha Diaz is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Natasha Diaz's NPI active?
- Yes — Natasha Diaz's NPI (1659300408) is active in the NPPES registry as of the last update on 2019-12-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.