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THOMAS P BRIEN MD
NPI 1962461327
Pathology - Anatomic Pathology & Clinical Pathology in Chattanooga, TN

Active since March 22, 2006PECOS EnrolledAccepts Medicare Assignment
94.7/100
CMS Quality Rating
1651 GUNBARREL RD STE 102A, CHATTANOOGA, TN 37421(423) 468-1543 Get Directions Write a Review

NPPES record last updated: January 10, 2023. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Thomas P Brien Md NPPES

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

THOMAS P BRIEN MD (NPI 1962461327) is an individual anatomic pathology & clinical pathology provider in Chattanooga, Tennessee, licensed in Tennessee (MD00034141) and active in the NPI registry since March 2006. He is enrolled in Medicare PECOS, is affiliated with Memorial Healthcare System, Inc, and is a graduate of University Of Rochester School Of Medicine And Dentistry (1992).

NPPES Registry Identity

NPI1962461327
Entity TypeIndividualMale
Primary Taxonomy207ZP0102X
Provider Legal NameTHOMAS P BRIENCredential: MD
Location Address1651 GUNBARREL RD STE 102AChattanooga, TN 37421-3289
Mailing Address4976 Alpha LnHixson, TN 37343-5470 · (423) 497-5355 · Fax (423) 308-0281
Phone(423) 468-1543
Sole ProprietorNo
Medical School CMSUniversity Of Rochester School Of Medicine And DentistryGraduated 1992
Enumeration DateMarch 22, 2006
Last NPPES UpdateJanuary 10, 2023
NPPES CertifiedJanuary 10, 2023
✔ NPI 1962461327 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPathology · Anatomic Pathology & Clinical PathologyAllopathic & Osteopathic Physicians
Taxonomy Code207ZP0102X
License✔ Licensed in TN · MD00034141
Definition
A pathologist deals with the causes and nature of disease and contributes to diagnosis, prognosis and treatment through knowledge gained by the laboratory application of the biologic, chemical and physical sciences. A pathologist uses information gathered from the microscopic examination of tissue specimens, cells and body fluids, and from clinical laboratory tests on body fluids and secretions for the diagnosis, exclusion and monitoring of disease.
1651 GUNBARREL RD STE 102A, Chattanooga, TN 37421
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Other Identifiers 1

Medicaid3149334TN

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Alliant Health Plans, Inc., Ambetter from Arkansas Health & Wellness, Ambetter Health and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Thomas P Brien Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID446375307
PECOS Enrollment IDI20110620000322
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

2

Medicare enrollment records show Thomas Brien reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Diagnostic Pathology Serv PC
5.7 mi
Anatomic Pathology & Clinical Pathology
2525 DESALES AVENUE
Chattanooga, TN 37404
  • Reassigned Medicare billing, Tennessee enrollment
  • 11 clinicians in this Medicare group
NPI 1275595449 (423) 718-2313
Galen Medical Group, PC
8.7 mi
Internal Medicine
4976 ALPHA LN
Hixson, TN 37343
  • Reassigned Medicare billing, Tennessee enrollment
  • 158 clinicians in this Medicare group
NPI 1346250057 (423) 497-5355

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

Areas of Expertise CMS Part B claims 9

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Pathology examination of tissue using a microscope, intermediate complexity 88305
A pathology examination of tissue with intermediate complexity involves studying a small sample of your body tissue under a microscope. This helps in identifying any abnormal cells or signs of disease. It's a detailed process requiring expert analysis to ensure accurate results.
4,432 services1,522 patients
Pathology examination of tissue using a microscope, intermediate complexity 88305
A pathology examination of tissue with intermediate complexity involves studying a small sample of your body tissue under a microscope. This helps in identifying any abnormal cells or signs of disease. It's a detailed process requiring expert analysis to ensure accurate results.
1,852 services830 patients
Special stained specimen slides to examine tissue, initial procedure 88342
This procedure involves the use of specially stained slides to examine tissue samples. The initial process involves obtaining a small tissue sample from your body. This sample is then placed on a slide and stained with special dyes to highlight different structures and elements. The stained slide is then examined under a microscope to help diagnose any potential health issues.
97 services68 patients
Special stained specimen slides to examine tissue, each additional procedure 88341
Special stained specimen slides are used to analyze tissue in detail. In this process, extra procedures may be needed for a more thorough examination. These involve applying special stains to the tissue on slides, enhancing specific elements for closer study.
93 services13 patients
Special stained specimen slides to examine tissue, initial procedure 88342
This procedure involves the use of specially stained slides to examine tissue samples. The initial process involves obtaining a small tissue sample from your body. This sample is then placed on a slide and stained with special dyes to highlight different structures and elements. The stained slide is then examined under a microscope to help diagnose any potential health issues.
64 services59 patients
Special stained specimen slides to examine tissue, each additional procedure 88341
Special stained specimen slides are used to analyze tissue in detail. In this process, extra procedures may be needed for a more thorough examination. These involve applying special stains to the tissue on slides, enhancing specific elements for closer study.
53 services17 patients

Hospital Affiliations CMS Care Compare 2

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Memorial Healthcare System, Inc

Acute Care Hospitals · Chattanooga, TN
5/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number440091
Location2525 Desales AveChattanooga, TN 37404 · Hamilton County

Parkridge Medical Center

Acute Care Hospitals · Chattanooga, TN
4/5 CMS rating
OwnershipProprietary
CMS Certification Number440156
Location2333 Mccallie AveChattanooga, TN 37404 · Hamilton County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 37421 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$121.80 typical visit price
range $52.64 – $160.89
Typical copayment $30.45 (range $13.16 – $40.22)
Most-billed visit code 99204
Established Patient
$93.60 typical visit price
range $16.72 – $131.41
Typical copayment $23.40 (range $4.18 – $32.85)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

94.7/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored through an Alternative Payment Model
Quality89.41
Promoting Interoperability100
Improvement Activities40

Other Providers at the Same Location NPPES 2

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

DR. KARYN LEIGH PRENSHAW M.D.
Pathology (Anatomic Pathology & Clinical Pathology)
1651 GUNBARREL RD STE 102A
CHATTANOOGA, TN 37421
Hamilton County (423) 468-1543
ERIN SMITH THIBAULT MD
Pathology (Anatomic Pathology & Clinical Pathology)
1651 GUNBARREL RD STE 102A
CHATTANOOGA, TN 37421
Hamilton County (423) 468-1543

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 Brien's NPI number?

The NPI number for Thomas Brien is 1962461327. It was assigned to this individual provider in the NPPES registry on March 22, 2006.

Where is Thomas Brien located?

Thomas Brien practices at 1651 Gunbarrel Rd Ste 102A, Chattanooga, TN 37421. The listed phone number is (423) 468-1543.

What is Thomas Brien's specialty?

The primary specialty registered for this NPI is Pathology, specializing in Anatomic Pathology & Clinical Pathology, with taxonomy code 207ZP0102X.

Is Thomas Brien enrolled in Medicare?

Yes. Thomas Brien is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Thomas Brien's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Thomas Brien reassigns Medicare benefits to 2 organizations: Diagnostic Pathology Serv PC (Chattanooga, TN) and Galen Medical Group, PC (Hixson, TN). Each 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 Thomas Brien's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Thomas Brien accept?

Health plans from Alliant Health Plans, Inc., Ambetter Health, Ambetter from Arkansas Health & Wellness, Ambetter of Alabama and Ambetter of North Carolina and 2 other insurers list Thomas Brien 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.

Is Thomas Brien affiliated with any hospitals?

According to CMS data, Thomas Brien is affiliated with Memorial Healthcare System, Inc and Parkridge Medical Center.

When was this NPI record last updated?

The NPPES record for Thomas Brien was last updated on January 10, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years 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.