DR. GREGORY S SCHLESSINGER (MD) – Nephrology Physician, NPI 1255313441
Nephrology Physician
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Doctor Profile
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Profile Insights
NPPES metrics only — not quality of care.
185 NEPHROLOGY in CO
Provider Addresses for DR. GREGORY S SCHLESSINGER (MD)
1444 S Potomac St Ste 215
Aurora, CO 800124533
Phone: (720) 500-3439
Fax: (855) 712-9183
Type: Location
1760 Prairie Ave Ste 100
Cheyenne, WY 820094833
Phone: (307) 263-4022
Type: Location
South Parker Road, Denver, Denver County, Colorado, 80247-2121, United States
DENVER, CO 802318068
Phone: (720) 500-3439
Fax: (720) 500-3559
Type: Location
9777 S YOSEMITE ST STE 110
LONE TREE, CO 801243115
Phone: (720) 696-0852
Fax: (720) 696-0892
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 34 Open Payments records for all available years, with a total value of $880.
Total Amount is formed as General ($880) + Research ($0) + Ownership ($0) = $880.
Last reported payment date: 2024-11-01 • Largest payer in this snapshot: Amgen Inc. ($229).
Total Amount
$880
General + Research + Ownership
Payments
34
Total payment records
General Amount
$880
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-11-01
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Amgen Inc. | $229 |
| AKEBIA THERAPEUTICS INC | $125 |
| Otsuka America Pharmaceutical, Inc. | $106 |
| AstraZeneca Pharmaceuticals LP | $73 |
| Horizon Therapeutics plc | $52 |
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2026-03-02
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking 11 Medicare enrollment records; no due dates published yet.
Enrollment records
11
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20101216000185 | I | Nephrology | CO | TBD |
| I20230404001986 | I | Nephrology | WY | TBD |
| I20240529000776 | I | Nephrology | AK | TBD |
| I20240726001880 | I | Nephrology | MO | TBD |
| I20240801001306 | I | Nephrology | KS | TBD |
| I20241115003005 | I | Nephrology | UT | TBD |
| I20250102003471 | I | Nephrology | TX | TBD |
| I20250325002010 | I | Nephrology | CA | TBD |
| I20250421002359 | I | Nephrology | OK | TBD |
| I20251002002216 | I | Nephrology | NY | TBD |
| I20260302003714 | I | Nephrology | HI | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 90962 | Dialysis services, 1 physician visit per month (20 years or older) | 121 | 24 | $0 |
| 99232 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 67 | 27 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 65 | 48 | $0 |
| 99215 | Established patient office or other outpatient visit, 40-54 minutes | 31 | 22 | $0 |
| 99233 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 29 | 14 | $0 |
Insurance plans in this area (ZIP 80012)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| NEPHROLOGY | CO | 81002 | Urinalysis, manual test | 66 | 50 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| N E P H R O L O G Y | CO | |
| Nurse Practitioner | MO | |
| Nephrology, Internal Medicine, Hospitalist | CO | |
| Physician Assistant | CO | |
| Nephrology, Internal Medicine | CO | |
| Nurse Practitioner | KS | |
| Nurse Practitioner | GA | |
| Nurse Practitioner | KS | |
| Physician Assistant | CO | |
| N E P H R O L O G Y | CO |
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