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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

AUSTIN FREDERICK TIESENGA
NPI 1740977446
Internal Medicine in Grand Rapids, MI

Active since April 21, 2023PECOS Enrolled
100 MICHIGAN ST NE, GRAND RAPIDS, MI 49503(616) 391-3139 Get Directions Write a Review

NPPES record last updated: September 21, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Sep 21, 2026, Feb 6, 2024 (2 updates tracked since 2024).

About Austin Frederick Tiesenga NPPES

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

AUSTIN FREDERICK TIESENGA (NPI 1740977446) is an individual internal medicine provider in Grand Rapids, Michigan, licensed in Michigan (5101029453) and active in the NPI registry since April 2023. He is enrolled in Medicare PECOS, is affiliated with Lakeland Hospital, St Joseph, and is a graduate of Liberty Univ College Of Osteopathic Medicine (2023).

NPPES Registry Identity

NPI1740977446
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameAUSTIN FREDERICK TIESENGA
Location Address100 MICHIGAN ST NEGrand Rapids, MI 49503-2560
Mailing Address100 Michigan St Ne, Mc 845Grand Rapids, MI 49503-2560
Phone(616) 391-3139
Sole ProprietorNo
Medical School CMSLiberty Univ College Of Osteopathic MedicineGraduated 2023
Enumeration DateApril 21, 2023
Last NPPES UpdateSeptember 21, 20262 updates tracked since enumeration
NPPES CertifiedSeptember 21, 2026
✔ NPI 1740977446 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in MI · 5101029453
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.
100 MICHIGAN ST NE, Grand Rapids, MI 49503
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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 (PECOS)

Austin Frederick Tiesenga is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID2062871791
PECOS Enrollment IDI20260728000371
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 Austin Tiesenga reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Spectrum Health Primary Care Partners
0.1 mi
Hospitalist
100 MICHIGAN ST NE
Grand Rapids, MI 49503
  • Reassigned Medicare billing, Michigan enrollment
  • 2,446 clinicians in this Medicare group
NPI 1790093763 (616) 391-3139

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

Hospital Affiliations CMS Care Compare

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

Lakeland Hospital, St Joseph

Acute Care Hospitals · St Joseph, MI
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number230021
Location1234 Napier AvenueSt Joseph, MI 49085 · Berrien County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 49503 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
$126.15 typical visit price
range $54.34 – $166.68
Typical copayment $31.53 (range $13.58 – $41.67)
Most-billed visit code 99204
Established Patient
$96.44 typical visit price
range $17.09 – $135.40
Typical copayment $24.11 (range $4.27 – $33.85)
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 20

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

MAUREEN TAN PEDRES M.D.
Internal Medicine
100 MICHIGAN ST NE, SUITE A721
GRAND RAPIDS, MI 49503
Kent County (616) 391-3139
MATTHEW H ARMSTRONG MD
Anesthesiology
100 MICHIGAN ST NE
GRAND RAPIDS, MI 49503
Kent County (616) 391-1510
ALINE DE QUADROS TEIXEIRA MD
Internal Medicine
100 MICHIGAN ST NE
GRAND RAPIDS, MI 49503
Kent County (616) 391-3139
DR. LINDSEY DANIELLE CONRADO PT, DPT
Physical Therapist
100 MICHIGAN ST NE
GRAND RAPIDS, MI 49503
Kent County (161) 639-1177
DANIEL H. ROBINSON D.O.
Anesthesiology
100 MICHIGAN ST NE
GRAND RAPIDS, MI 49503
Kent County (616) 391-1510
MARK GREENWOOD DO
Emergency Medicine
100 MICHIGAN ST NE, MC 71
GRAND RAPIDS, MI 49503
Kent County (616) 391-5310
RAYMOND SCUREK MD
Emergency Medicine
100 MICHIGAN ST NE
GRAND RAPIDS, MI 49503
Kent County (616) 391-1680
MRS. RACHEL LEIGH VANSTRIEN PA-C
Physician Assistant
100 MICHIGAN ST NE, SUITE 8861
GRAND RAPIDS, MI 49503
Kent County (616) 391-0800

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 Austin Tiesenga's NPI number?

The NPI number for Austin Tiesenga is 1740977446. It was assigned to this individual provider in the NPPES registry on April 21, 2023.

Where is Austin Tiesenga located?

Austin Tiesenga practices at 100 Michigan St NE, Grand Rapids, MI 49503. The listed phone number is (616) 391-3139.

What is Austin Tiesenga's specialty?

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

Is Austin Tiesenga enrolled in Medicare?

Yes. Austin Tiesenga is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Austin Tiesenga's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Austin Tiesenga reassigns Medicare benefits to Spectrum Health Primary Care Partners (Grand Rapids, MI). 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 Austin Tiesenga's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Austin Tiesenga affiliated with any hospitals?

According to CMS data, Austin Tiesenga is affiliated with Lakeland Hospital, St Joseph.

When was this NPI record last updated?

The NPPES record for Austin Tiesenga was last updated on September 21, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 38 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.