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AUSTON DANIEL STIEFER
NPI 1356972053
Internal Medicine in Aurora, CO

Active since January 31, 2020PECOS EnrolledAccepts Medicare Assignment
12700 E 19TH AVE # 9C03, AURORA, CO 80045(303) 724-9287 Get Directions Write a Review

NPPES record last updated: March 26, 2026. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Mar 26, 2026, Jul 1, 2025, Aug 24, 2022 and 4 more (7 updates tracked since 2020).

About Auston Daniel Stiefer NPPES

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

AUSTON DANIEL STIEFER (NPI 1356972053) is an individual internal medicine provider in Aurora, Colorado, licensed in Colorado (DR.0077405) and active in the NPI registry since January 2020. He is enrolled in Medicare PECOS and is a graduate of University Of Oklahoma College Of Medicine (2022).

NPPES Registry Identity

NPI1356972053
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameAUSTON DANIEL STIEFER
Location Address12700 E 19TH AVE # 9C03Aurora, CO 80045-2560
Mailing Address12700 E 19th Ave # 9c03Aurora, CO 80045-2560
Phone(303) 724-9287
Sole ProprietorNo
Medical School CMSUniversity Of Oklahoma College Of MedicineGraduated 2022
Enumeration DateJanuary 31, 2020
Last NPPES UpdateMarch 26, 20267 updates tracked since enumeration
NPPES CertifiedMarch 26, 2026
✔ NPI 1356972053 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in CO · DR.0077405
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Also ListedInternal Medicine · Critical Care MedicineTaxonomy 207RC0200X · License DR.0077405 (CO)
Also ListedInternal Medicine · Pulmonary DiseaseTaxonomy 207RP1001X · License DR.0077405 (CO)
12700 E 19TH AVE # 9C03, Aurora, CO 80045
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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

Auston Daniel Stiefer 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 ID1951785237
PECOS Enrollment IDI20260501000526
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 Reassignment

Medicare enrollment records show Auston Stiefer reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Critical Care Pulmonary And Sleep Associates Professional LLP
16 mi
Critical Care Medicine
274 UNION BLVD STE 200
Lakewood, CO 80228
  • Reassigned Medicare billing, Colorado enrollment
  • 67 clinicians in this Medicare group
NPI 1437100039 (303) 951-0600

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 80045 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.

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 Auston Stiefer's NPI number?

The NPI number for Auston Stiefer is 1356972053. It was assigned to this individual provider in the NPPES registry on January 31, 2020.

Where is Auston Stiefer located?

Auston Stiefer practices at 12700 E 19th Ave # 9c03, Aurora, CO 80045. The listed phone number is (303) 724-9287.

What is Auston Stiefer's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Auston Stiefer enrolled in Medicare?

Yes. Auston Stiefer 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 organization bills Medicare for Auston Stiefer's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Auston Stiefer reassigns Medicare benefits to Critical Care Pulmonary And Sleep Associates Professional LLP (Lakewood, CO). The 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 Auston Stiefer's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Auston Stiefer was last updated on March 26, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 months 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.