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

DR. THOMAS HAROLD CASSELL DDS
NPI 1104896315
Dentist - General Practice in Fennville, MI

Q: What is Thomas Cassell's NPI number?

The NPI number for Thomas Cassell is 1104896315. It was assigned to this individual provider in the NPPES registry on January 23, 2006.

Q: What is Thomas Cassell's specialty?

The primary specialty registered for this NPI is Dentist, specializing in General Practice, with taxonomy code 1223G0001X.

Q: When was this NPI record last updated?

The NPPES record for Thomas Cassell was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 28 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.

Active since January 23, 2006

200 N MAPLE ST, FENNVILLE, MI 49408(269) 561-2904(269) 561-2997 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

On this page

About Dr. Thomas Harold Cassell Dds NPPES

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

DR. THOMAS HAROLD CASSELL DDS (NPI 1104896315) is an individual general practice provider in Fennville, Michigan, licensed in Michigan (9157) and active in the NPI registry since January 2006.

NPPES Registry Identity

NPI1104896315

Entity TypeIndividualMale

Primary Taxonomy1223G0001X

Provider Legal NameDR. THOMAS HAROLD CASSELLCredential: DDS

Location Address200 N MAPLE STFennville, MI 49408-0506

Mailing AddressPo Box 506Fennville, MI 49408-0506 · (269) 561-2904 · Fax (269) 561-2997

Phone(269) 561-2904

Fax(269) 561-2997

Sole ProprietorNo

Enumeration DateJanuary 23, 2006

Last NPPES UpdateJuly 13, 2026

✔ NPI 1104896315 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyDentist · General PracticeDental Providers

Taxonomy Code1223G0001X

License✔ Licensed in MI · 9157

Definition

A general dentist is the primary dental care provider for patients of all ages. The general dentist is responsible for the diagnosis, treatment, management and overall coordination of services related to patients' oral health needs.

200 N MAPLE ST, Fennville, MI 49408

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Other Identifiers 1

Medicaid4009864MI

Other Providers at the Same Location NPPES 3

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

LAKESIDE SMILES, PLLC

Dentist (General Practice)

200 N MAPLE ST
FENNVILLE, MI 49408

Allegan County (269) 561-2904

KATELIN ELIZABETH DEKKER NP

Nurse Practitioner (Family)

200 N MAPLE ST
FENNVILLE, MI 49408

Allegan County (269) 561-8761

ASCENSION BORGESS ALLEGAN HOSPITAL

Clinic/Center (Rural Health)

200 N MAPLE ST
FENNVILLE, MI 49408

Allegan County (269) 561-8761

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 Thomas Cassell's NPI number?

The NPI number for Thomas Cassell is 1104896315. It was assigned to this individual provider in the NPPES registry on January 23, 2006.

Where is Thomas Cassell located?

Thomas Cassell practices at 200 N Maple St, Fennville, MI 49408. The listed phone number is (269) 561-2904.

What is Thomas Cassell's specialty?

The primary specialty registered for this NPI is Dentist, specializing in General Practice, with taxonomy code 1223G0001X.

When was this NPI record last updated?

The NPPES record for Thomas Cassell was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 28 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.