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TRYSTAN ROBERT THAYER MS, RD
NPI 1457100034
Dietitian, Registered in Grand Rapids, MI

Active since May 15, 2024
221 MICHIGAN ST NE STE 200, GRAND RAPIDS, MI 49503(616) 267-8950 Get Directions Write a Review

NPPES record last updated: July 8, 2024. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jul 8, 2024, May 15, 2024 (2 updates tracked since 2024).

About Trystan Robert Thayer Ms, Rd NPPES

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

TRYSTAN ROBERT THAYER MS, RD (NPI 1457100034) is an individual dietitian, registered in Grand Rapids, Michigan and active in the NPI registry since May 2024.

NPPES Registry Identity

NPI1457100034
Entity TypeIndividualMale
Primary Taxonomy133V00000X
Provider Legal NameTRYSTAN ROBERT THAYERCredential: MS, RD
Location Address221 MICHIGAN ST NE STE 200Grand Rapids, MI 49503-2533
Mailing Address100 Michigan St Ne # Mc845Grand Rapids, MI 49503-2560
Phone(616) 267-8950
Sole ProprietorNo
Enumeration DateMay 15, 2024
Last NPPES UpdateJuly 8, 20242 updates tracked since enumeration
NPPES CertifiedJuly 8, 2024
✔ NPI 1457100034 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyDietitian, RegisteredDietary & Nutritional Service Providers
Taxonomy Code133V00000X
Definition
A Registered Dietitian (RD)/Registered Dietitian Nutritionist (RDN) is an individual uniquely trained in the science of nutrition and practice of dietetics to design and provide medical nutrition therapy (MNT) and other evidence-based applications of the Nutrition Care Process (NCP) that exemplify the profession's systematic approach to providing high quality nutrition care. Registered dietitians provide MNT for the purpose of disease prevention or management, or to treat or rehabilitate an illness, injury, or condition, with the use of specific, indicated physical and cognitive nutrition care services comprised of one or more of the following aspects of the NCP: nutrition assessment/reassessment, nutrition diagnosis, nutrition intervention (e.g., nutrition counseling, therapeutic diet ordering, and nutrition education) and nutrition monitoring and evaluation.
221 MICHIGAN ST NE STE 200, Grand Rapids, MI 49503
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Priority Health.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Trystan Robert Thayer Ms, Rd is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Medicare Billing Reassignment

Medicare enrollment records show Trystan Thayer 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
Internal Medicine
100 MICHIGAN ST NE
Grand Rapids, MI 49503
  • Reassigned Medicare billing, Michigan enrollment
  • 2,446 clinicians in this Medicare group
NPI 1689499667 (616) 486-6790

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

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.

NICOLE DENICE BRODERSON MS, RD
Dietitian, Registered
221 MICHIGAN ST NE STE 200
GRAND RAPIDS, MI 49503
Kent County (616) 267-8950
LINDSEY KEUNING NP
Nurse Practitioner
221 MICHIGAN ST NE STE 200
GRAND RAPIDS, MI 49503
Kent County (616) 267-8950
LISA HURSIN RD
Dietitian, Registered
221 MICHIGAN ST NE STE 200
GRAND RAPIDS, MI 49503
Kent County (616) 267-8950
LACEY CRUMBACK RD
Dietitian, Registered
221 MICHIGAN ST NE STE 200
GRAND RAPIDS, MI 49503
Kent County (616) 267-8950
EMILY AUTUMN PIANKO RD
Dietitian, Registered
221 MICHIGAN ST NE STE 200
GRAND RAPIDS, MI 49503
Kent County (616) 267-8950
EMILY WELLES R.D.
Dietitian, Registered
221 MICHIGAN ST NE STE 200
GRAND RAPIDS, MI 49503
Kent County (616) 267-8950
JESSICA MARIE THOMAS PA
Physician Assistant
221 MICHIGAN ST NE STE 200
GRAND RAPIDS, MI 49503
Kent County (616) 267-8950
MERGIME IMERI PA
Physician Assistant
221 MICHIGAN ST NE STE 200
GRAND RAPIDS, MI 49503
Kent County (616) 267-8950

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 Trystan Thayer's NPI number?

The NPI number for Trystan Thayer is 1457100034. It was assigned to this individual provider in the NPPES registry on May 15, 2024.

Where is Trystan Thayer located?

Trystan Thayer practices at 221 Michigan St NE Ste 200, Grand Rapids, MI 49503. The listed phone number is (616) 267-8950.

What is Trystan Thayer's specialty?

The primary specialty registered for this NPI is Dietitian, Registered with taxonomy code 133V00000X.

Is Trystan Thayer enrolled in Medicare?

Yes. Trystan Thayer is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Trystan Thayer's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Trystan Thayer 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 Trystan Thayer's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Trystan Thayer accept?

Health plans from Priority Health list Trystan Thayer 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 Trystan Thayer was last updated on July 8, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.