DILIGENT MEDICAL CARE, PLLC
NPI 1972976256
Internal Medicine - Addiction Medicine in Knoxville, TN

Q: What is Diligent Medical Care, PLLC's NPI number?

The NPI number for Diligent Medical Care, PLLC is 1972976256. It was assigned to this organization in the NPPES registry on November 9, 2015.

Q: What is Diligent Medical Care, PLLC's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Addiction Medicine, with taxonomy code 207RA0401X.

Active since November 09, 2015CLIA 44D2079560 · Waiver

4038 GAP RD, SUITE 101, KNOXVILLE, TN 37912(865) 689-5757(865) 689-5755 Get Directions Write a Review

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

Record update history: May 8, 2026, Feb 22, 2016, Nov 9, 2015 (3 updates tracked since 2015).

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About Diligent Medical Care, Pllc NPPES

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

DILIGENT MEDICAL CARE, PLLC (NPI 1972976256) is a healthcare organization registered as an addiction medicine in Knoxville, Tennessee and active in the NPI registry since November 2015. The organization holds a CLIA Waiver certificate valid through June 17, 2028 and lists Essam M Aghel, President, as its authorized official.

NPPES Registry Identity

NPI1972976256

Entity TypeOrganization

Primary Taxonomy207RA0401X

Legal Business NameDILIGENT MEDICAL CARE, PLLC

Location Address4038 GAP RD, SUITE 101Knoxville, TN 37912-5903

Mailing Address4038 Gap Rd, Suite 101Knoxville, TN 37912-5903 · (865) 689-5757 · Fax (865) 689-5755

Phone(865) 689-5757

Fax(865) 689-5755

Organization SubpartNo

Authorized OfficialEssam M AghelPresident · (865) 689-5757

Enumeration DateNovember 9, 2015

Last NPPES UpdateMay 8, 20263 updates tracked since enumeration

NPPES CertifiedMay 8, 2026

✔ NPI 1972976256 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyInternal Medicine · Addiction MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207RA0401X

Definition

An internist doctor of osteopathy that specializes in the treatment of addiction disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine can obtain a Certificate of Added Qualifications in the field of Addiction Medicine.

Also ListedInternal MedicineTaxonomy 207R00000X

Also ListedClinic/Center · Primary CareTaxonomy 261QP2300X · License 40298 (TN)

4038 GAP RD, Knoxville, TN 37912

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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

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Diligent Medical Care, Pllc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Diligent Medical Care, PLLC, which bills Medicare for the services this clinician delivers.

Clinician (1)

Essam Aghel, MD

Internal Medicine

NPI 1184651481

4038 GAP RD SUITE 101
Knoxville, TN 37912

(865) 689-5757

✔ PECOSSame address

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

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 44D2079560

Diligent Medical Care, PLLC · Knoxville, TN

Active · expires Jun 17, 2028

CLIA Number44D2079560

Laboratory TypePhysician Office

Certificate Effective DateJune 18, 2026

Certificate Expiration DateJune 17, 2028

Laboratory DirectorEssam Aghel

Laboratory Phone(865) 689-5757

Laboratory LocationDiligent Medical Care, PLLC4038 Gap Road, Suite 101, Knoxville, TN 37912

CLIA data matches this NPI record on: Address Name Phone

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

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 Diligent Medical Care, PLLC's NPI number?

The NPI number for Diligent Medical Care, PLLC is 1972976256. It was assigned to this organization in the NPPES registry on November 9, 2015.

Where is Diligent Medical Care, PLLC located?

Diligent Medical Care, PLLC is located at 4038 Gap Rd Suite 101, Knoxville, TN 37912. The listed phone number is (865) 689-5757.

What is Diligent Medical Care, PLLC's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Addiction Medicine, with taxonomy code 207RA0401X.

Is Diligent Medical Care, PLLC enrolled in Medicare?

Yes. Diligent Medical Care, PLLC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Diligent Medical Care, PLLC?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Internal Medicine) reassigns their Medicare billing to Diligent Medical Care, PLLC. A 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 the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Does Diligent Medical Care, PLLC hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 44D2079560) is associated with this NPI, valid through June 17, 2028. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

When was this NPI record last updated?

The NPPES record for Diligent Medical Care, PLLC was last updated on May 8, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.