Wahid Kassar, M.D.
NPI 1144203647 · Endocrinology, Diabetes & Metabolism Physician · Chicago, IL
Enrolled with Medicare as Practitioner - Endocrinology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Wahid Kassar, M.D. is a Endocrinology, Diabetes & Metabolism Physician provider in Chicago, IL (NPI 1144203647).
Provider details
- NPI number
- 1144203647
- Entity type
- Individual
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 036107989 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
3,367 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 784 | $109 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 650 | $122 |
| Hemoglobin A1c Level83036 | 443 | $9 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 409 | $73 |
| Blood Glucose (sugar) Test Performed By Hand-Held Instrument82962 | 376 | $3 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 315 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 56 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Semaglutidebrand: Ozempic | 375 | 101 |
| Tirzepatidebrand: Mounjaro | 306 | 57 |
| Metformin Hcl | 302 | 121 |
| Pen Needle, Diabeticbrand: Nano 2nd Gen Pen Needle | 298 | 125 |
| Empagliflozinbrand: Jardiance | 254 | 78 |
| Levothyroxine Sodium | 178 | 71 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$108,489 across 334 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
Additional practice locations (2)
- 900 S Frontage Rd Ste 375Woodridge, IL 60517-5144Phone: (630) 866-3636Fax: (773) 692-2035
- 6050 Sterling Creek RdPortage, IN 46368-7752Phone: (219) 763-8112
Registry dates
- Enumerated
- 2005-11-29
- Last updated
- 2025-10-02
- Certified
- 2025-10-02
Frequently asked questions
- What is Wahid Kassar's NPI number?
- Wahid Kassar's National Provider Identifier (NPI) is 1144203647, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Wahid Kassar's specialty?
- Wahid Kassar is listed in the NPPES registry with a primary specialty of Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is Wahid Kassar located?
- Wahid Kassar's practice location on file with NPPES is 7447 W Talcott Ave Ste 467, Chicago, IL 60631-3715.
- What is Wahid Kassar's phone number?
- The practice phone number listed in the NPPES registry for Wahid Kassar is (630) 866-3636.
- Does Wahid Kassar accept Medicare?
- Wahid Kassar is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Wahid Kassar's NPI active?
- Yes — Wahid Kassar's NPI (1144203647) is active in the NPPES registry as of the last update on 2025-10-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.