Doctor profile · Federal record

Dr. Thomas O'Brien, M.D.

Anatomic Pathology & Clinical Pathology Physician · Memphis, TN

  • NPI 1336124973
  • MIPS 75.0 / 100 · 2023
  • 21 yrs on file
  • Male
  • Group practice
  • No sanctions

Practice & contact

Operates at 2 locations .

NPPES Updated May 11, 2026
Primary practice
3495 Hacks Cross RD
Memphis, TN 381258803
(901) 526-7444
fax (901) 526-0791
Additional location
1211 Union Ave, Suite 300
Memphis, TN 381046638
(901) 725-7551
fax (901) 725-9721

Credentials & registration

NPPES · NUCC
NPI registered
December 2005 — 21 yrs on file
Profile last updated
August 26, 2024
Specialty taxonomy
207ZP0102X — NUCC code
State license (1)
Tennessee #018290
Medicaid
TN #3061998

Federal sanctions & exclusions

OIG LEIE Updated May 11, 2026

No sanctions, exclusions or revocations on file

Checked against OIG LEIE on NPI 1336124973. Last verified May 11, 2026.

Medicare procedures · 2023

Top services delivered

CMS Provider Utilization
Total services
2,994
Distinct HCPCS
7
Medicare allowed
$178,983
HCPCS Description Services Patients Avg allowed
88305 Pathology examination of tissue using a microscope, intermediate complexity 2,106 1,177 $55
88312 Special stained specimen slides to identify organisms including interpretation and report 438 403 $92
88313 Special stained specimen slides to examine tissue including interpretation and report 116 109 $69
88341 Special stained specimen slides to examine tissue, each additional procedure 106 39 $56
88304 Pathology examination of tissue using a microscope, moderately low complexity 100 93 $27
88342 Special stained specimen slides to examine tissue, initial procedure 99 85 $62
88311 Preparation of tissue for examination by removing any calcium present 29 23 $15

In context: peer comparison

Among 20 peers in Memphis Anatomic Pathology & Clinical Pathology Physician, average services per provider: 591. This provider delivers 5.1× the peer median.

Frequently asked questions

Auto-generated from federal data
What is Dr. Thomas O'Brien's medical specialty?
Dr. Thomas O'Brien practices Anatomic Pathology & Clinical Pathology Physician in Memphis, TN.
Where does Dr. Thomas O'Brien practice?
Dr. Thomas O'Brien practices at 3495 Hacks Cross RD, Memphis, TN 381258803. Office phone: 9015267444.
What is Dr. Thomas O'Brien's NPI?
Dr. Thomas O'Brien's National Provider Identifier (NPI) is 1336124973, issued by NPPES.
What procedures does Dr. Thomas O'Brien commonly perform?
Top Medicare-reported procedures in 2023: Pathology examination of tissue using a microscope, intermediate complexity (HCPCS 88305); Special stained specimen slides to identify organisms including interpretation and report (HCPCS 88312); Special stained specimen slides to examine tissue including interpretation and report (HCPCS 88313). Source: CMS Medicare Physician & Other Practitioners file.