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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

DR. TIMOTHY A SISEMORE PH.D.
NPI 1821074832
Psychologist - Clinical in Chattanooga, TN

Active since December 21, 2005Opted out of Medicare · through Oct 1, 2027
6400 LEE HWY, STE 106, CHATTANOOGA, TN 37421(423) 756-2894(423) 756-2899 Get Directions Write a Review

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

Record update history: Jul 13, 2026, Aug 14, 2017 (2 updates tracked since 2017).

About Dr. Timothy A Sisemore Ph.d. NPPES

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

DR. TIMOTHY A SISEMORE PH.D. (NPI 1821074832) is an individual clinical provider in Chattanooga, Tennessee, licensed in Tennessee (P-1091) and active in the NPI registry since December 2005. He has opted out of Medicare through October 1, 2027.

NPPES Registry Identity

NPI1821074832
Entity TypeIndividualMale
Primary Taxonomy103TC0700X
Provider Legal NameDR. TIMOTHY A SISEMORECredential: PH.D.
Location Address6400 LEE HWY, STE 106Chattanooga, TN 37421-2452
Mailing Address6400 Lee Hwy, Ste 106Chattanooga, TN 37421-2452 · (423) 756-2894 · Fax (423) 756-2899
Phone(423) 756-2894
Fax(423) 756-2899
Sole ProprietorNo
Enumeration DateDecember 21, 2005
Last NPPES UpdateJuly 13, 20262 updates tracked since enumeration
✔ NPI 1821074832 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychologist · ClinicalBehavioral Health & Social Service Providers
Taxonomy Code103TC0700X
License✔ Licensed in TN · P-1091
Definition
A psychologist who provides continuing and comprehensive mental and behavioral health care for individuals and families; consultation to agencies and communities; training, education and supervision; and research-based practice. It is a specialty in breadth -- one that is broadly inclusive of severe psychopathology -- and marked by comprehensiveness and integration of knowledge and skill from a broad array of disciplines within and outside of psychology proper. The scope of clinical psychology encompasses all ages, multiple diversities and varied systems.
6400 LEE HWY, Chattanooga, TN 37421
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

ⓘ

Opted out of Medicare

Dr. Timothy A Sisemore Ph.d. has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from October 1, 2025 through October 1, 2027.

Opt-Out Effective DateOctober 1, 2025
Opt-Out In Effect ThroughOctober 1, 2027Opt-out affidavits renew automatically every two years unless cancelled

Other Providers at the Same Location NPPES 9

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

MEREDITH CASADA
Social Worker (Clinical)
6400 LEE HWY, SUITE 106
CHATTANOOGA, TN 37421
Hamilton County (423) 855-0402
MS. JENNIFER L MAZZEI MA, SPE
Counselor (Mental Health)
6400 LEE HWY, SUITE 110
CHATTANOOGA, TN 37421
Hamilton County (423) 899-5081
LAURA D HUDDLESTON LPC
Counselor (Professional)
6400 LEE HWY, ST 110
CHATTANOOGA, TN 37421
Hamilton County (423) 899-5081
DR. SUSAN K MCGUIRE MD
Psychiatry & Neurology (Child & Adolescent Psychiatry)
6400 LEE HWY, ST 110
CHATTANOOGA, TN 37421
Hamilton County (423) 648-4951
FOCUS PSYCHIATRIC SERVICES PC
Counselor (Mental Health)
6400 LEE HWY, ST 110
CHATTANOOGA, TN 37421
Hamilton County (423) 899-5081
LYN R OWEN LPC, MHSP
Counselor (Mental Health)
6400 LEE HWY, SUITE 106
CHATTANOOGA, TN 37421
Hamilton County (423) 855-0402
PAUL C LONG PH D
Psychologist (Clinical)
6400 LEE HWY, ST 110
CHATTANOOGA, TN 37421
Hamilton County (423) 899-5081
ROBIN W HOWARD
Counselor (Mental Health)
6400 LEE HWY
CHATTANOOGA, TN 37421
Hamilton County (423) 899-5081

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 Timothy Sisemore's NPI number?

The NPI number for Timothy Sisemore is 1821074832. It was assigned to this individual provider in the NPPES registry on December 21, 2005.

Where is Timothy Sisemore located?

Timothy Sisemore practices at 6400 Lee Hwy Ste 106, Chattanooga, TN 37421. The listed phone number is (423) 756-2894.

What is Timothy Sisemore's specialty?

The primary specialty registered for this NPI is Psychologist, specializing in Clinical, with taxonomy code 103TC0700X.

Is Timothy Sisemore enrolled in Medicare?

No. Timothy Sisemore has opted out of Medicare through October 1, 2027. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out.

When was this NPI record last updated?

The NPPES record for Timothy Sisemore 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 22 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.