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DR. SIERRA ARMBRUST DO
NPI 1235879461
Family Medicine in Chattanooga, TN

Active since March 29, 2022PECOS Enrolled
7380 VOLKSWAGEN DR STE 110, CHATTANOOGA, TN 37416(423) 778-8950(423) 778-8951 Get Directions Write a Review

NPPES record last updated: September 3, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Dr. Sierra Armbrust Do NPPES

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

DR. SIERRA ARMBRUST DO (NPI 1235879461) is an individual family medicine provider in Chattanooga, Tennessee, licensed in Tennessee (6087) and active in the NPI registry since March 2022. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1235879461
Entity TypeIndividualFemale
Primary Taxonomy207Q00000X
Provider Legal NameDR. SIERRA ARMBRUSTCredential: DO
Location Address7380 VOLKSWAGEN DR STE 110Chattanooga, TN 37416-1761
Mailing Address7380 Volkswagen Dr Ste 110Chattanooga, TN 37416-1761 · (423) 778-8950 · Fax (423) 778-8951
Phone(423) 778-8950
Fax(423) 778-8951
Sole ProprietorNo
Enumeration DateMarch 29, 2022
Last NPPES UpdateSeptember 3, 2025
NPPES CertifiedSeptember 3, 2025
✔ NPI 1235879461 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207Q00000X
License✔ Licensed in TN · 6087
Definition
Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.
7380 VOLKSWAGEN DR STE 110, Chattanooga, TN 37416
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Alliant Health Plans, Inc., Ambetter from Absolute Total Care, Ambetter Health and more.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Sierra Armbrust Do is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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 Sierra Armbrust reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Erlanger Health
8.9 mi
Internal Medicine
979 E 3RD ST STE A440
Chattanooga, TN 37403
  • Reassigned Medicare billing, Tennessee enrollment
  • 679 clinicians in this Medicare group
NPI 1477256303 (423) 778-2867

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 37416 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
$81.53 typical visit price
range $52.64 – $160.89
Typical copayment $20.38 (range $13.16 – $40.22)
Most-billed visit code 99203
Established Patient
$93.60 typical visit price
range $16.72 – $131.41
Typical copayment $23.40 (range $4.18 – $32.85)
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 2

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

MRS. REBECCA ANN CARTER FNP
Nurse Practitioner (Family)
7380 VOLKSWAGEN DR STE 110
CHATTANOOGA, TN 37416
Hamilton County (423) 778-8950
KAYLEY GRACE MARVEL
Family Medicine
7380 VOLKSWAGEN DR STE 110
CHATTANOOGA, TN 37416
Hamilton County (253) 403-2938

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 Sierra Armbrust's NPI number?

The NPI number for Sierra Armbrust is 1235879461. It was assigned to this individual provider in the NPPES registry on March 29, 2022.

Where is Sierra Armbrust located?

Sierra Armbrust practices at 7380 Volkswagen Dr Ste 110, Chattanooga, TN 37416. The listed phone number is (423) 778-8950.

What is Sierra Armbrust's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Is Sierra Armbrust enrolled in Medicare?

Yes. Sierra Armbrust is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Sierra Armbrust's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Sierra Armbrust reassigns Medicare benefits to Erlanger Health (Chattanooga, TN). 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 Sierra Armbrust's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Sierra Armbrust accept?

Health plans from Alliant Health Plans, Inc., Ambetter Health, Ambetter from Absolute Total Care, Ambetter of Alabama and Ambetter of North Carolina and 4 other insurers list Sierra Armbrust 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 Sierra Armbrust was last updated on September 3, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.