Mazen Diab, M.D.
NPI 1134436819 · Nephrology Physician · Tinley Park, IL
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mazen Diab, M.D. is a Nephrology Physician provider in Tinley Park, IL (NPI 1134436819).
Provider details
- NPI number
- 1134436819
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- MT198421 (PA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
15 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
2,460 Medicare services, 2024 (ranked within specialty)
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 methodology.
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 | 1,069 | $120 |
| Hemodialysis Procedure With Physician Evaluation90935 | 283 | $72 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 236 | $81 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 206 | $175 |
| Dialysis Services, 2-3 Physician Visits Per Month (20 Years Or Older)90961 | 130 | $299 |
| Critical Care, First 30-74 Minutes99291 | 114 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 16 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Furosemide | 95 | 48 |
| Sevelamer Carbonate | 72 | 17 |
| Amlodipine Besylate | 57 | 21 |
| Hydralazine Hcl | 53 | 20 |
| Carvedilol | 42 | 19 |
| Calcium Acetate | 26 | 13 |
| Sodium Zirconium Cyclosilicatebrand: Lokelma | 21 | 11 |
| Midodrine Hcl | 20 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2010-09-02
- Last updated
- 2017-03-30
Frequently asked questions
- What is Mazen Diab's NPI number?
- Mazen Diab's National Provider Identifier (NPI) is 1134436819, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mazen Diab's specialty?
- Mazen Diab is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Mazen Diab located?
- Mazen Diab's practice location on file with NPPES is 17495 La Grange Rd, Tinley Park, IL 60487-7581.
- What is Mazen Diab's phone number?
- The practice phone number listed in the NPPES registry for Mazen Diab is (630) 873-8875.
- Does Mazen Diab accept Medicare?
- Mazen Diab is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mazen Diab's NPI active?
- Yes — Mazen Diab's NPI (1134436819) is active in the NPPES registry as of the last update on 2017-03-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.