Gill Frei, MD
NPI 1477541761 · Nephrology Physician · Bronx, NY
Enrolled with Medicare as Practitioner - Neurology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gill Frei, MD is a Nephrology Physician provider in Bronx, NY (NPI 1477541761).
Provider details
- NPI number
- 1477541761
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 168619 (NY)
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
20 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
570 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) |
|---|---|---|
| Dialysis Services, 4 Or More Physician Visits Per Month (20 Years Or Older)90960 | 171 | $403 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 94 | $9 |
| Dialysis Services, 2-3 Physician Visits Per Month (20 Years Or Older)90961 | 77 | $336 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 75 | $122 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 61 | $93 |
| 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 · 37 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Losartan Potassium | 236 | 80 |
| Sevelamer Carbonate | 166 | 55 |
| Amlodipine Besylate | 103 | 35 |
| Nifedipinebrand: Nifedipine Er | 89 | 25 |
| Lactulose | 88 | 25 |
| Atorvastatin Calcium | 82 | 22 |
| Calcium Acetate | 71 | 21 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$340 across 14 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
- 2005-10-11
- Last updated
- 2016-05-26
Frequently asked questions
- What is Gill Frei's NPI number?
- Gill Frei's National Provider Identifier (NPI) is 1477541761, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gill Frei's specialty?
- Gill Frei is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Gill Frei located?
- Gill Frei's practice location on file with NPPES is 1200 Waters Pl, Bronx, NY 10461-2728.
- What is Gill Frei's phone number?
- The practice phone number listed in the NPPES registry for Gill Frei is (718) 794-1200.
- Does Gill Frei accept Medicare?
- Gill Frei is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gill Frei's NPI active?
- Yes — Gill Frei's NPI (1477541761) is active in the NPPES registry as of the last update on 2016-05-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.