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STEFAN J. CHIMOSKEY MD
NPI 1023102498
Family Medicine - Sleep Medicine in Boulder, CO

Active since October 03, 2006PECOS EnrolledAccepts Medicare Assignment
3601 ARAPAHOE AVE, UNIT D180, BOULDER, CO 80303(720) 845-5858(505) 288-3642 Get Directions Write a Review

NPPES record last updated: June 12, 2020. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jun 12, 2020, Jun 4, 2020, Feb 26, 2020 (3 updates tracked since 2020).

About Stefan J. Chimoskey Md NPPES

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

STEFAN J. CHIMOSKEY MD (NPI 1023102498) is an individual sleep medicine provider in Boulder, Colorado, licensed in Colorado (0052058) and active in the NPI registry since October 2006. He is enrolled in Medicare PECOS, maintains a secondary practice location in Albuquerque, and is a graduate of University Of Washington School Of Medicine (1998).

NPPES Registry Identity

NPI1023102498
Entity TypeIndividualMale
Primary Taxonomy207QS1201X
Provider Legal NameSTEFAN J. CHIMOSKEYCredential: MD
Location Address3601 ARAPAHOE AVE, UNIT D180Boulder, CO 80303-1584
Mailing AddressPo Box 26666, Phs Provider EnrollmentAlbuquerque, NM 87125-6666 · (505) 923-5356 · Fax (505) 923-5354
Phone(720) 845-5858
Fax(505) 288-3642
Sole ProprietorNo
Medical School CMSUniversity Of Washington School Of MedicineGraduated 1998
Enumeration DateOctober 3, 2006
Last NPPES UpdateJune 12, 20203 updates tracked since enumeration
NPPES CertifiedJune 12, 2020
✔ NPI 1023102498 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyFamily Medicine · Sleep MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207QS1201X
Licenses✔ Licensed in CO · 0052058✔ Licensed in NM · 2001-156
Definition
A Family Medicine Physician who practices Sleep Medicine is certified in the subspecialty of sleep medicine and specializes in the clinical assessment, physiologic testing, diagnosis, management and prevention of sleep and circadian rhythm disorders. Sleep specialists treat patients of any age and use multidisciplinary approaches. Disorders managed by sleep specialists include, but are not limited to, sleep related breathing disorders, insomnia, hypersomnias, circadian rhythm sleep disorders, parasomnias and sleep related movement disorders.
Also ListedFamily MedicineTaxonomy 207Q00000X · License 2001156 (NM)
3601 ARAPAHOE AVE, Boulder, CO 80303
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Secondary Practice Location 1

Location 13901 Atrisco Dr NW, PMG ATRISCOAlbuquerque, NM 87120-1627 · Phone (505) 462-7575 · Fax (505) 462-7555

Other Identifiers 1

Medicaid35424737NM

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Providence Health Plan, 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

Stefan J. Chimoskey 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 ID1658412648
PECOS Enrollment IDI20140106000240
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

4

Medicare enrollment records show Stefan Chimoskey reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Intermountain Medical Group Denver, LLC
8.1 mi
Neurology
380 EMPIRE RD STE 120
Lafayette, CO 80026
  • Reassigned Medicare billing, Colorado enrollment
  • 1,270 clinicians in this Medicare group
NPI 1669122925 (303) 673-1390
Montrose Memorial Hospital, Inc
175 mi
Obstetrics & Gynecology
311 PALMER ST
Delta, CO 81416
  • Reassigned Medicare billing, Colorado enrollment
  • 150 clinicians in this Medicare group
NPI 1114698453 (970) 249-6737
Rehoboth Mckinley Christian Health Care Services, Inc
364 mi
Urgent Care
1850 E HIGHWAY 66 STE 1
Gallup, NM 87301
  • Reassigned Medicare billing, New Mexico enrollment
  • 179 clinicians in this Medicare group
NPI 1043160955 (505) 488-2603
Scl Health Medical Group - Billings LLC
432 mi
Gynecologic Oncology
602 HENRY CHAPPLE ST
Billings, MT 59106
  • Reassigned Medicare billing, Montana enrollment
  • 438 clinicians in this Medicare group
NPI 1114601549 (406) 901-2440

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 4

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 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.
24 services20 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.
17 services17 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.
15 services14 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.
11 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 80303 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
$89.43 typical visit price
range $58.06 – $174.82
Typical copayment $22.35 (range $14.51 – $43.70)
Most-billed visit code 99203
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 13

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

Tubing with integrated heating element for use with positive airway pressure device A4604
DME-Other DME · category DE001N
12 suppliers233 claims233 services$40.59 avg. paid by Medicare
Full face mask used with positive airway pressure device, each A7030
DME-Other DME · category DE001N
11 suppliers236 claims236 services$103.56 avg. paid by Medicare
Face mask interface, replacement for full face mask, each A7031
DME-Other DME · category DE001N
11 suppliers217 claims281 services$39.55 avg. paid by Medicare
Pillow for use on nasal cannula type interface, replacement only, pair A7033
DME-Other DME · category DE001N
4 suppliers16 claims50 services$13.56 avg. paid by Medicare
Nasal interface (mask or cannula type) used with positive airway pressure device, with or without head strap A7034
DME-Other DME · category DE001N
6 suppliers51 claims51 services$69.21 avg. paid by Medicare
Headgear used with positive airway pressure device A7035
DME-Other DME · category DE001N
10 suppliers156 claims156 services$20.58 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

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 Stefan Chimoskey's NPI number?

The NPI number for Stefan Chimoskey is 1023102498. It was assigned to this individual provider in the NPPES registry on October 3, 2006.

Where is Stefan Chimoskey located?

Stefan Chimoskey practices at 3601 Arapahoe Ave Unit D180, Boulder, CO 80303. The listed phone number is (720) 845-5858.

What is Stefan Chimoskey's specialty?

The primary specialty registered for this NPI is Family Medicine, specializing in Sleep Medicine, with taxonomy code 207QS1201X.

Is Stefan Chimoskey enrolled in Medicare?

Yes. Stefan Chimoskey 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.

Which organizations bill Medicare for Stefan Chimoskey's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Stefan Chimoskey reassigns Medicare benefits to 4 organizations: Intermountain Medical Group Denver, LLC (Lafayette, CO), Montrose Memorial Hospital, Inc (Delta, CO), Rehoboth Mckinley Christian Health Care Services, Inc (Gallup, NM) and Scl Health Medical Group - Billings LLC (Billings, MT). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Stefan Chimoskey's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Stefan Chimoskey accept?

Health plans from Providence Health Plan and Select Health list Stefan Chimoskey 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.

When was this NPI record last updated?

The NPPES record for Stefan Chimoskey was last updated on June 12, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 years 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.