Individual Healthcare Provider
Gregory S Schlessinger, MD
Provider's NPPES record last updated: April 4, 2023
Overview
- Entity Type
- Individual Healthcare Provider
- NPI
- 1255313441
- Primary Specialty
- Internal Medicine — Nephrology
- Practice Location
- Lone Tree, Colorado
- Sole Proprietor
- No
Federal Screening
NPISignal checked this NPI against federal exclusion sources. Results below are based on the NPI number itself — an identifier match, not a name match.
List of Excluded Individuals/Entities (LEIE)
HHS Office of Inspector General
No potential match was identified in NPISignal's indexed List of Excluded Individuals/Entities (LEIE) records as of 2026-09-10.
- Source data
- September 10, 2026
- Records indexed
- 84,001
- Screened
- Sep 19, 2026, 6:57 AM UTC
This reflects only the records NPISignal currently holds and the identity information supplied. It is not a verification of eligibility, licensure, or compliance. Verify decisions that matter against the authoritative source.
SAM.gov Exclusions
U.S. General Services Administration
SAM.gov Exclusions was not checked.
SAM.gov screening is not configured on this deployment. No SAM check has been performed.
- Screened
- Not checked
This is an NPI-based check only. NPISignal does not publish name-based exclusion matches on a provider profile. A shared or similar name is a lead that requires human review, not an identification, and this page is not the place to make one. Run a name-based screening below to see potential matches with the reasons for each.
This reflects only the records NPISignal currently holds and the identity information supplied. It is not a verification of eligibility, licensure, or compliance. Verify decisions that matter against the authoritative source.
Searches OIG LEIE and SAM.gov by name and reviews every potential match.
Specialties & Taxonomies
- Primary
Internal Medicine
Nephrology
Allopathic & Osteopathic Physicians
An internist who treats disorders of the kidney, high blood pressure, fluid and mineral balance and dialysis of body wastes when the kidneys do not function. This specialist consults with surgeons about kidney transplantation.
Taxonomy code 207RN0300X
Provider-Reported License Information
- Internal Medicine (Colorado)
- 37524
- Internal Medicine (Wyoming)
- 13028C
Practice Locations
Practice Location
9777 S Yosemite St Ste 110
Lone Tree, Colorado 80124-3115
Phone: (720) 696-0852
Additional Practice Location
1444 S Potomac St Ste 215
Aurora, Colorado 80012-4533
Phone: (720) 500-3439
Fax: (855) 712-9183
Additional Practice Location
1760 Prairie Ave Ste 100
Cheyenne, Wyoming 82009-4833
Phone: (307) 263-4022
Record Information
- Enumeration Date
- November 15, 2005
- Provider's NPPES Record Last Updated
- April 4, 2023
- Certification Date
- April 4, 2023
- NPISignal NPPES Dataset
- August 2026
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