Aaron Gurfinchel, MD
NPI 1639392939 · Nephrology Physician · Joliet, IL
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Aaron Gurfinchel, MD is a Nephrology Physician provider in Joliet, IL (NPI 1639392939).
Provider details
- NPI number
- 1639392939
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 036-103677 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
1,838 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 | 880 | $119 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 241 | $107 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 169 | $87 |
| Critical Care, First 30-74 Minutes99291 | 151 | $216 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 130 | $176 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 |
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 |
|---|---|---|
| Calcitriol | 127 | 37 |
| Amlodipine Besylate | 92 | 27 |
| Allopurinol | 67 | 21 |
| Furosemide | 66 | 27 |
| Hydrochlorothiazide | 59 | 16 |
| Calcium Acetate | 52 | 16 |
| Hydralazine Hcl | 52 | 17 |
| Potassium Chloride | 28 | 12 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$44 across 3 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 (1)
- 1890 Silver Cross Blvd Ste 415New Lenox, IL 60451-9575Phone: (815) 717-8750Fax: (815) 717-8751
Registry dates
- Enumerated
- 2007-04-11
- Last updated
- 2025-04-28
- Certified
- 2025-04-28
Frequently asked questions
- What is Aaron Gurfinchel's NPI number?
- Aaron Gurfinchel's National Provider Identifier (NPI) is 1639392939, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Aaron Gurfinchel's specialty?
- Aaron Gurfinchel is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Aaron Gurfinchel located?
- Aaron Gurfinchel's practice location on file with NPPES is 3100 Theodore Street, Joliet, IL 60435.
- What is Aaron Gurfinchel's phone number?
- The practice phone number listed in the NPPES registry for Aaron Gurfinchel is (815) 744-5550.
- Does Aaron Gurfinchel accept Medicare?
- Aaron Gurfinchel is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Aaron Gurfinchel's NPI active?
- Yes — Aaron Gurfinchel's NPI (1639392939) is active in the NPPES registry as of the last update on 2025-04-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.