DR. GREGORY S SCHLESSINGER MD
NPI 1255313441
Internal Medicine - Nephrology in Lone Tree, CO

Q: What is Gregory Schlessinger's NPI number?

The NPI number for Gregory Schlessinger is 1255313441. It was assigned to this individual provider in the NPPES registry on November 15, 2005.

Q: What is Gregory Schlessinger's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.

Active since November 15, 2005PECOS EnrolledAccepts Medicare Assignment

9777 S YOSEMITE ST STE 110, LONE TREE, CO 80124(720) 696-0852(720) 696-0892 Get Directions Write a Review

NPPES record last updated: April 4, 2023. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Apr 4, 2023, Apr 22, 2022, Sep 17, 2020 (3 updates tracked since 2020).

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About Dr. Gregory S Schlessinger Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. GREGORY S SCHLESSINGER MD (NPI 1255313441) is an individual nephrology provider in Lone Tree, Colorado, licensed in Colorado (37524) and active in the NPI registry since November 2005. He is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of Vanderbilt University School Of Medicine (1993).

NPPES Registry Identity

NPI1255313441

Entity TypeIndividualMale

Primary Taxonomy207RN0300X

Provider Legal NameDR. GREGORY S SCHLESSINGERCredential: MD

Location Address9777 S YOSEMITE ST STE 110Lone Tree, CO 80124-3115

Mailing Address9777 S Yosemite St Ste 110Lone Tree, CO 80124-3115 · (720) 696-0852 · Fax (720) 696-0892

Phone(720) 696-0852

Fax(720) 696-0892

Sole ProprietorNo

Medical School CMSVanderbilt University School Of MedicineGraduated 1993

Enumeration DateNovember 15, 2005

Last NPPES UpdateApril 4, 20233 updates tracked since enumeration

NPPES CertifiedApril 4, 2023

✔ NPI 1255313441 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · NephrologyAllopathic & Osteopathic Physicians

Taxonomy Code207RN0300X

Licenses✔ Licensed in CO · 37524✔ Licensed in WY · 13028C

Definition

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.

9777 S YOSEMITE ST STE 110, Lone Tree, CO 80124

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Secondary Practice Locations 2

Location 11444 S Potomac St Ste 215Aurora, CO 80012-4533 · Phone (720) 500-3439 · Fax (855) 712-9183

Location 21760 Prairie Ave Ste 100Cheyenne, WY 82009-4833 · Phone (307) 263-4022

Other Identifiers 1

Medicaid64939766CO

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Select Health.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Gregory S Schlessinger Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID5890749568

PECOS Enrollment IDI20101216000185, I20230404001986, I20240529000776, I20240726001880, I20240801001306, I20260302003714

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

Medicare enrollment records show Gregory Schlessinger reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Rocky Mountain Kidney Care LLC

Same address

Nephrology

9777 S YOSEMITE ST STE 110
Lone Tree, CO 80124

Reassigned Medicare billing, Alaska, Colorado, Hawaii, Kansas, Missouri and Wyoming enrollments
2 clinicians in this Medicare group

NPI 1861082117 (720) 696-0852

Snowy Range Kidney Care LLC

128 mi

Nephrology

2710 HARNEY ST STE 200
Laramie, WY 82072

Reassigned Medicare billing, Wyoming enrollment
5 clinicians in this Medicare group

NPI 1306461108 (307) 223-0726

Kit Carson County Health Services District

141 mi

Critical Access

286 16TH STREET
Burlington, CO 80807

Reassigned Medicare billing, Colorado enrollment
17 clinicians in this Medicare group

NPI 1184711475 (719) 346-5311

Rocky Mountain Kidney Care PC

952 mi

Nephrology

2000 S EL CAMINO REAL FL 1
San Mateo, CA 94403

Reassigned Medicare billing, California enrollment
6 clinicians in this Medicare group

NPI 1316761943 (888) 288-5977

Rocky Mountain Kidney Care Professional Service Corp

1,006 mi

Nephrology

1005 S AIRPORT DR
Weslaco, TX 78596

Reassigned Medicare billing, New York, Oklahoma and Texas enrollments
4 clinicians in this Medicare group

NPI 1558181636 (469) 590-5955

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 6

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

54 services40 patients

Dialysis services, 4 or more physician visits per month (20 years or older) 90960

Dialysis is a treatment that filters and purifies your blood using a machine. It helps keep your fluids and electrolytes in balance when the kidneys can't do their job. This service includes 4 or more visits per month with a physician to monitor your health and adjust your treatment as needed.

33 services15 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

27 services18 patients

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215

This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.

21 services17 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

20 services19 patients

Dialysis services, 2-3 physician visits per month (20 years or older) 90961

Dialysis is a treatment that performs the function of healthy kidneys if they're not working properly. It removes waste and excess fluid from your blood. 2-3 physician visits per month are recommended for monitoring your health and adjusting your treatment as needed. This service is available for those aged 20 years and older.

15 services15 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 80124 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$132.55 typical visit price

range $58.06 – $174.82

Typical copayment $33.13 (range $14.51 – $43.70)

Most-billed visit code 99204

Established Patient

$102.03 typical visit price

range $18.88 – $142.79

Typical copayment $25.50 (range $4.72 – $35.69)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 11

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. MICHAEL ALAN ROCKLIN M.D.

Internal Medicine (Nephrology)