JONATHAN C FELLERS MD PA LLC
NPI 1457823817
Clinic/Center - Multi-Specialty in Portland, ME

Q: What is Jonathan C Fellers MD PA LLC's NPI number?

The NPI number for Jonathan C Fellers MD PA LLC is 1457823817. It was assigned to this organization in the NPPES registry on December 26, 2018. The provider is doing business as Cortex Behavioral Health.

Q: What is Jonathan C Fellers MD PA LLC's specialty?

The primary specialty registered for this NPI is Clinic/Center, specializing in Multi-Specialty, with taxonomy code 261QM1300X.

Active since December 26, 2018CLIA 20D2166096 · Waiver

1 CITY CTR STE 8130, PORTLAND, ME 04101(207) 221-0635(207) 221-0634 Get Directions Write a Review

NPPES record last updated: August 22, 2025. Verified against the NPPES registry weekly; last sync: October 04, 2026.

Record update history: Mar 8, 2022, Oct 1, 2020, Dec 26, 2018 (3 updates tracked since 2018).

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About Jonathan C Fellers Md Pa Llc NPPES

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

JONATHAN C FELLERS MD PA LLC (NPI 1457823817), doing business as Cortex Behavioral Health, is a healthcare organization registered as a multi-specialty in Portland, Maine and active in the NPI registry since December 2018. The organization holds a CLIA Waiver certificate valid through May 12, 2027 and lists Jonathan Carl Fellers, Owner, as its authorized official.

NPPES Registry Identity

NPI1457823817

Entity TypeOrganization

Primary Taxonomy261QM1300X

Legal Business NameJONATHAN C FELLERS MD PA LLC

Location Address1 CITY CTR STE 8130Portland, ME 04101-6420

Mailing Address1 City Ctr Ste 8130Portland, ME 04101-6420 · (207) 221-0635 · Fax (207) 221-0634

Phone(207) 221-0635

Fax(207) 221-0634

Organization SubpartNo

Authorized OfficialJonathan Carl FellersOwner · (207) 221-0635

Enumeration DateDecember 26, 2018

Last NPPES UpdateAugust 22, 20253 updates tracked since enumeration

NPPES CertifiedAugust 22, 2025

✔ NPI 1457823817 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 8

★ Primary SpecialtyClinic/Center · Multi-SpecialtyAmbulatory Health Care Facilities

Taxonomy Code261QM1300X

Also ListedCounselor · Addiction (Substance Use Disorder)Taxonomy 101YA0400X

Also ListedCounselor · Mental HealthTaxonomy 101YM0800X

Also ListedIndependent Medical ExaminerTaxonomy 202C00000X

Also ListedPreventive Medicine · Addiction MedicineTaxonomy 2083A0300X

Also ListedPsychiatry & Neurology · PsychiatryTaxonomy 2084P0800X

Also ListedPsychiatry & Neurology · Addiction PsychiatryTaxonomy 2084P0802X

Also ListedNurse Practitioner · Psychiatric/Mental HealthTaxonomy 363LP0808X

1 CITY CTR STE 8130, Portland, ME 04101

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Other Names 1

Doing Business AsCortex Behavioral Health

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

CLIA Laboratory Certificates CMS CLIA

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate of Waiver 20D2166096

Jonathan C Fellers MD PA LLC Dba Cortex Behavioral Health · Portland, ME

Active · expires May 12, 2027

CLIA Number20D2166096

Laboratory TypePhysician Office

Certificate Effective DateMay 13, 2025

Certificate Expiration DateMay 12, 2027

Laboratory DirectorJonathan C. Fellers

Laboratory Phone(207) 221-0635

Laboratory LocationJonathan C Fellers MD PA LLC Dba Cortex Behavioral Health1 City Center Suite 8130, Portland, ME 04101

CLIA data matches this NPI record on: Name Phone

This certificate is issued to a laboratory to perform only waived tests.

Other Providers at the Same Location NPPES

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

JONATHAN CARL FELLERS MD

Psychiatry & Neurology (Addiction Psychiatry)

1 CITY CTR STE 8130
PORTLAND, ME 04101

Cumberland County (207) 221-0635

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 Jonathan C Fellers MD PA LLC's NPI number?

The NPI number for Jonathan C Fellers MD PA LLC is 1457823817. It was assigned to this organization in the NPPES registry on December 26, 2018. The provider is doing business as Cortex Behavioral Health.

Where is Jonathan C Fellers MD PA LLC located?

Jonathan C Fellers MD PA LLC is located at 1 City Ctr Ste 8130, Portland, ME 04101. The listed phone number is (207) 221-0635.

What is Jonathan C Fellers MD PA LLC's specialty?

The primary specialty registered for this NPI is Clinic/Center, specializing in Multi-Specialty, with taxonomy code 261QM1300X.

Does Jonathan C Fellers MD PA LLC hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 20D2166096) is associated with this NPI, valid through May 12, 2027. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

When was this NPI record last updated?

The NPPES record for Jonathan C Fellers MD PA LLC was last updated on August 22, 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.