Maryam Diaz, DNP FNP-BC
NPI 1891356721 · Family Nurse Practitioner · Chicago, IL
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Maryam Diaz, DNP FNP-BC is a Family Nurse Practitioner provider in Chicago, IL (NPI 1891356721).
Provider details
- NPI number
- 1891356721
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- DNP FNP-BC
- Sex
- Female
- Sole proprietor
- No
- License
- 041407865 (IL)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Nursing Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
7 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
411 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. 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 .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 196 | $85 |
| Continuous Monitoring of Blood Sugar Level in Tissue Fluid Using Sensor Under Skin With Interpretation and Report95251 | 89 | $30 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 77 | $14 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 28 | $58 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 21 | $118 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 35 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Dulaglutidebrand: Trulicity | 332 | 85 |
| Empagliflozinbrand: Jardiance | 262 | 77 |
| Metformin Hcl | 159 | 52 |
| Insulin Glargine,hum.rec.anlogbrand: Lantus Solostar | 149 | 54 |
| Insulin Glargine,hum.rec.anlogbrand: Basaglar Kwikpen U-100 | 144 | 48 |
| Semaglutidebrand: Ozempic | 132 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$97 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
- 2019-06-21
- Last updated
- 2024-12-05
- Certified
- 2024-12-05
Frequently asked questions
- What is Maryam Diaz's NPI number?
- Maryam Diaz's National Provider Identifier (NPI) is 1891356721, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Maryam Diaz's specialty?
- Maryam Diaz is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Maryam Diaz located?
- Maryam Diaz's practice location on file with NPPES is 1801 W Taylor St Ste 1c, Chicago, IL 60612-4795.
- What is Maryam Diaz's phone number?
- The practice phone number listed in the NPPES registry for Maryam Diaz is (312) 413-3631.
- Does Maryam Diaz accept Medicare?
- Maryam Diaz is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Maryam Diaz's NPI active?
- Yes — Maryam Diaz's NPI (1891356721) is active in the NPPES registry as of the last update on 2024-12-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.