Doctor profile · Federal record
Dr. Thomas O'Connor, M.D.
Internal Medicine Physician (CMS: Hematology/Oncology) · Hematology & Oncology Physician · Weymouth, MA
- NPI 1669507141
- Accepts Medicare
- MIPS 83.1 / 100 · 2023
- 25 yrs in practice
- Licensed in 2 states
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
51 Performance Dr, Suite #110
Weymouth, MA 021893141
(781) 337-9091 - Mailing address
-
10 Willard St
Quincy, MA 021691281
Credentials & registration
- NPI registered
- February 2007 — 19 yrs on file
- Profile last updated
- January 21, 2014
- Year of graduation
- 2001 — 25 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State licenses (2)
- District of Columbia #MD035011 · Massachusetts #231774
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1669507141. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
1,720
Distinct HCPCS
8
Medicare allowed
$136,391
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 1,389 | 623 | $71 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 172 | 129 | $104 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 61 | 61 | $143 | |
99203 |
New patient office or other outpatient visit, 30-44 minutes | 40 | 40 | $89 | |
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 16 | 15 | $154 | |
99442 |
Telephone medical discussion with physician, 11-20 minutes | 16 | 15 | $71 | |
99205 |
New patient office or other outpatient visit, 60-74 minutes | 14 | 14 | $194 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 12 | 12 | $139 |
In context: peer comparison
Among 10 peers in this city , average services per provider: 635. This provider delivers 2.7× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
1,044
Patients
332
Total drug cost
$1,051,591
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Oxycodone Hcl | Generic | 136 | 26 | $1,999 |
| Prednisone | Generic | 134 | 37 | $979 |
| Letrozole | Generic | 110 | 36 | $3,772 |
| Abiraterone Acetate | Generic | 102 | 24 | $382,157 |
| Gabapentin | Generic | 69 | 19 | $639 |
| Lorazepam | Generic | 62 | 17 | $217 |
| Ondansetron Hcl | Generic | 60 | 45 | $369 |
| Prochlorperazine Maleate | Generic | 60 | 41 | $1,051 |
| Bicalutamide | Generic | 57 | 30 | $970 |
| Dexamethasone | Generic | 53 | 31 | $640 |
Hospital affiliations
Frequently asked questions
What is Dr. Thomas O'Connor's medical specialty?
Dr. Thomas O'Connor practices Internal Medicine Physician in Weymouth, MA.
Where does Dr. Thomas O'Connor practice?
Dr. Thomas O'Connor practices at 51 Performance Dr, Weymouth, MA 021893141. Office phone: 7813379091.
What is Dr. Thomas O'Connor's NPI?
Dr. Thomas O'Connor's National Provider Identifier (NPI) is 1669507141, issued by NPPES.
Does Dr. Thomas O'Connor accept Medicare assignment?
Yes. Dr. Thomas O'Connor accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Thomas O'Connor commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99213); Established patient office or other outpatient visit (HCPCS 99214); New patient office or other outpatient visit (HCPCS 99204). Source: CMS Medicare Physician & Other Practitioners file.