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

JILL THEWLIS MA,PCC,LCDCIII
NPI 1649259136
Counselor - Addiction (Substance Use Disorder) in Massillon, OH

Q: What is Jill Thewlis's NPI number?

The NPI number for Jill Thewlis is 1649259136. It was assigned to this individual provider in the NPPES registry on January 12, 2006.

Q: What is Jill Thewlis's specialty?

The primary specialty registered for this NPI is Counselor, specializing in Addiction (Substance Use Disorder), with taxonomy code 101YA0400X.

Q: When was this NPI record last updated?

The NPPES record for Jill Thewlis 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 31 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 12, 2006

876 AMHERST RD NE, MASSILLON, OH 44646(330) 833-8516(330) 830-3395 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Jul 13, 2026, Sep 11, 2025, Jul 21, 2022 (3 updates tracked since 2022).

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About Jill Thewlis Ma,pcc,lcdciii NPPES

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

JILL THEWLIS MA,PCC,LCDCIII (NPI 1649259136) is an individual addiction (substance use disorder) provider in Massillon, Ohio, licensed in Ohio (051017) and active in the NPI registry since January 2006.

NPPES Registry Identity

NPI1649259136

Entity TypeIndividualFemale

Primary Taxonomy101YA0400X

Provider Legal NameJILL THEWLISCredential: MA,PCC,LCDCIII

Location Address876 AMHERST RD NEMassillon, OH 44646-8528

Mailing Address625 Cleveland Ave NwCanton, OH 44702-1805 · (330) 455-0374 · Fax (330) 455-2101

Phone(330) 833-8516

Fax(330) 830-3395

Sole ProprietorNo

Enumeration DateJanuary 12, 2006

Last NPPES UpdateJuly 13, 20263 updates tracked since enumeration

✔ NPI 1649259136 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyCounselor · Addiction (Substance Use Disorder)Behavioral Health & Social Service Providers

Taxonomy Code101YA0400X

License✔ Licensed in OH · 051017

Also ListedCounselor · ProfessionalTaxonomy 101YP2500X · License E2393 (OH)

876 AMHERST RD NE, Massillon, OH 44646

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Accepted Insurance

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

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 Jill Thewlis's NPI number?

The NPI number for Jill Thewlis is 1649259136. It was assigned to this individual provider in the NPPES registry on January 12, 2006.

Where is Jill Thewlis located?

Jill Thewlis practices at 876 Amherst Rd NE, Massillon, OH 44646. The listed phone number is (330) 833-8516.

What is Jill Thewlis's specialty?

The primary specialty registered for this NPI is Counselor, specializing in Addiction (Substance Use Disorder), with taxonomy code 101YA0400X.

What insurance does Jill Thewlis accept?

Health plans from MedMutual list Jill Thewlis 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 Jill Thewlis 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 31 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.