Thomas O'Brien, M.D.
NPI 1336124973 · Anatomic Pathology & Clinical Pathology Physician · Memphis, TN
Enrolled with Medicare as Practitioner - Pathology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Thomas O'Brien, M.D. is a Anatomic Pathology & Clinical Pathology Physician provider in Memphis, TN (NPI 1336124973).
Provider details
- NPI number
- 1336124973
- Entity type
- Individual
- Primary specialty
- Anatomic Pathology & Clinical Pathology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 018290 (TN)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
815 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Pathology Examination of Tissue Using a Microscope, Intermediate Complexity88305 | 619 | $60 |
| Pathology Examination of Tissue Using a Microscope, Moderately Low Complexity88304 | 50 | $28 |
| Special Stained Specimen Slides to Identify Organisms Including Interpretation and Report88312 | 39 | $69 |
| Special Stained Specimen Slides to Examine Tissue, Each Additional Procedure88341 | 30 | $57 |
| Special Stained Specimen Slides to Examine Tissue, Initial Procedure88342 | 23 | $78 |
| Preparation of Tissue for Examination By Removing Any Calcium Present88311 | 20 | $14 |
Practice location
Mailing address
Additional practice locations (1)
- 1211 Union AveSuite 300Memphis, TN 38104-6638Phone: (901) 725-7551Fax: (901) 725-9721
Registry dates
- Enumerated
- 2005-12-07
- Last updated
- 2024-08-26
- Certified
- 2024-08-26
Frequently asked questions
- What is Thomas O'Brien's NPI number?
- Thomas O'Brien's National Provider Identifier (NPI) is 1336124973, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Thomas O'Brien's specialty?
- Thomas O'Brien is listed in the NPPES registry with a primary specialty of Anatomic Pathology & Clinical Pathology Physician (Allopathic & Osteopathic Physicians).
- Where is Thomas O'Brien located?
- Thomas O'Brien's practice location on file with NPPES is 3495 Hacks Cross Rd, Memphis, TN 38125-8803.
- What is Thomas O'Brien's phone number?
- The practice phone number listed in the NPPES registry for Thomas O'Brien is (901) 526-7444.
- Does Thomas O'Brien accept Medicare?
- Thomas O'Brien is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Thomas O'Brien's NPI active?
- Yes — Thomas O'Brien's NPI (1336124973) is active in the NPPES registry as of the last update on 2024-08-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.