Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Gill L Frei, MD
Nephrology Physician in Bronx, NY · enumerated 2005.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1477541761
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Registry record
Entity type Individual (Type 1)
Name Gill L Frei
Credential MD
Sex Male
Practice address 1200 Waters Pl, Suite M104, Bronx, NY, 10461
Phone (718) 794-1200
Enumeration date Oct 11, 2005
Last updated in NPPES May 26, 2016
Taxonomy & licenses
207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 168619 (NY) Secondary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure.
About the MD credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 01251725 | Medicaid | NY | - |
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.
Frequently asked questions
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is Gill Frei?
Gill Frei is registered in NPPES with the primary taxonomy of Nephrology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Other providers at this practice address
Browse all → Jay Fleischman Ophthalmology Physician · Bronx, NY NPI 1497750673 Gastone Crea Vascular & Interventional Radiology Physician · Bronx, NY NPI 1558367227 Robert Lynn Nephrology Physician · Bronx, NY NPI 1851388862 Janice Gelfand Internal Medicine Physician · Bronx, NY NPI 1306834692 Nephrology & Hypertension Associates, PC Nephrology Physician · Bronx, NY NPI 1700858636 Robert Bernstein Diagnostic Radiology Physician · Bronx, NY NPI 1730146523 Marlo Feldman Occupational Therapist · Bronx, NY NPI 1689627861 Rose Sangregorio Occupational Therapist · Bronx, NY NPI 1730134842
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-05-26.