1. Home
  2. Directory
  3. Colorado
  4. Avon
  5. Internal Medicine
  6. NPI Profile
Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

GREGORY JAMES SCHLEIS MD
NPI 1154783207
Internal Medicine - Endocrinology, Diabetes & Metabolism in Avon, CO

Active since March 27, 2016PECOS EnrolledAccepts Medicare Assignment
50 BUCK CREEK RD STE 300, AVON, CO 81620(970) 926-6340(970) 926-6348 Get Directions Write a Review

NPPES record last updated: July 10, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Jul 10, 2026, Oct 8, 2021, Sep 9, 2021 and 2 more (5 updates tracked since 2016).

About Gregory James Schleis Md NPPES

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

GREGORY JAMES SCHLEIS MD (NPI 1154783207) is an individual endocrinology, diabetes & metabolism provider in Avon, Colorado, licensed in Colorado (CDR.0007037) and active in the NPI registry since March 2016. He is enrolled in Medicare PECOS, is affiliated with Deaconess Medical Center, and maintains a secondary practice location in Greenville.

NPPES Registry Identity

NPI1154783207
Entity TypeIndividualMale
Primary Taxonomy207RE0101X
Provider Legal NameGREGORY JAMES SCHLEISCredential: MD
Location Address50 BUCK CREEK RD STE 300Avon, CO 81620-5428
Mailing AddressPo Box 4330Avon, CO 81620-4330 · (970) 926-6340 · Fax (970) 926-6348
Phone(970) 926-6340
Fax(970) 926-6348
Sole ProprietorNo
Medical School CMSUniversity Of Wisconsin School Of MedicineGraduated 2016
Enumeration DateMarch 27, 2016
Last NPPES UpdateJuly 10, 20265 updates tracked since enumeration
NPPES CertifiedJuly 10, 2026
✔ NPI 1154783207 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Endocrinology, Diabetes & MetabolismAllopathic & Osteopathic Physicians
Taxonomy Code207RE0101X
Licenses✔ Licensed in CO · CDR.0007037✔ Licensed in SC · 85787
Definition
An internist who concentrates on disorders of the internal (endocrine) glands such as the thyroid and adrenal glands. This specialist also deals with disorders such as diabetes, metabolic and nutritional disorders, obesity, pituitary diseases and menstrual and sexual problems.
50 BUCK CREEK RD STE 300, Avon, CO 81620
Open in Google Maps ↗

Secondary Practice Location 1

Location 11025 Verdae BlvdGreenville, SC 29607-4032 · Phone (864) 242-4683 · Fax (864) 240-8104

Other Identifiers 1

Medicaid857870SC

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Premera Blue Cross Blue Shield of Alaska, Providence Health Plan.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Gregory James Schleis 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 ID3971935214
PECOS Enrollment IDI20230814002088
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.

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.
144 services69 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.
77 services46 patients
Continuous monitoring of blood sugar level in tissue fluid using sensor under skin with interpretation and report 95251
This procedure involves placing a small sensor under your skin to continuously monitor your blood sugar levels in tissue fluid. The data is interpreted and a report is generated to help manage your diabetes more effectively.
30 services13 patients
Diabetes outpatient self-management training services, individual, per 30 minutes G0108
This service involves personalized training sessions, each lasting 30 minutes, to help manage diabetes. It includes guidance on monitoring blood sugar, healthy eating, physical activity, medication usage, and dealing with daily challenges of living with diabetes.
27 services15 patients
New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205
This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.
23 services23 patients
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204
This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.
12 services12 patients

Hospital Affiliations CMS Care Compare 3

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Deaconess Medical Center

Acute Care Hospitals · Spokane, WA
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number500044
LocationW 800 Fifth AvenueSpokane, WA 99210 · Spokane County
Emergency services Birthing friendly

Multicare Valley Hospital

Acute Care Hospitals · Spokane, WA
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number500119
Location12606 East Mission AvenueSpokane, WA 99216 · Spokane County
Emergency services Birthing friendly

Tacoma General Allenmore Hospital

Acute Care Hospitals · Tacoma, WA
2/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number500129
Location315 S Mlk Jr WayTacoma, WA 98405 · Pierce County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 81620 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.

Referred Medical Equipment & Supplies CMS DME claims 2

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253
DME-Other DME · category DE017N
6 suppliers13 claims50 services$5.89 avg. paid by Medicare
Supply allowance for therapeutic continuous glucose monitor (cgm), includes all supplies and accessories, 1 month supply = 1 unit of service K0553
DME-Other DME · category DE017N
11 suppliers73 claims73 services$188.97 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 2

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

COLORADO MOUNTAIN MEDICAL, LLC
Clinic/Center (Multi-Specialty)
50 BUCK CREEK RD STE 300
AVON, CO 81620
Eagle County (970) 926-6340
MRS. REGAN C. PYLE DO
Allergy & Immunology (Allergy)
50 BUCK CREEK RD STE 300
AVON, CO 81620
Eagle County (970) 926-6340

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Gregory Schleis's NPI number?

The NPI number for Gregory Schleis is 1154783207. It was assigned to this individual provider in the NPPES registry on March 27, 2016.

Where is Gregory Schleis located?

Gregory Schleis practices at 50 Buck Creek Rd Ste 300, Avon, CO 81620. The listed phone number is (970) 926-6340.

What is Gregory Schleis's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.

Is Gregory Schleis enrolled in Medicare?

Yes. Gregory Schleis is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does Gregory Schleis accept?

Health plans from Premera Blue Cross Blue Shield of Alaska and Providence Health Plan list Gregory Schleis as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Gregory Schleis affiliated with any hospitals?

According to CMS data, Gregory Schleis is affiliated with Deaconess Medical Center, Multicare Valley Hospital and Tacoma General Allenmore Hospital.

When was this NPI record last updated?

The NPPES record for Gregory Schleis was last updated on July 10, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 29 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.