Doctor profile · Federal record
Dr. Casey O'Brien, PA-C
Physician Assistant · Williston, VT
- NPI 1073133484
- 6 yrs on file
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
426 Industrial Ave Ste 130
Williston, VT 054954449
(802) 878-1175
fax (802) 652-5355
Credentials & registration
- NPI registered
- April 2020 — 6 yrs on file
- Profile last updated
- January 13, 2026
- Specialty taxonomy
- 363A00000X — NUCC code
- State license (1)
- Vermont #055.0031747
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1073133484. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
465
Distinct HCPCS
6
Medicare allowed
$24,824
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
20610 |
Aspiration and/or injection of fluid from large joint | 226 | 94 | $43 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 145 | 114 | $54 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 39 | 34 | $80 | |
99203 |
New patient office or other outpatient visit, 30-44 minutes | 27 | 27 | $67 | |
99221 |
Initial hospital care with straightforward or low level of medical decision making, per day, if using time, at least 40 minutes | 16 | 16 | $68 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 12 | 12 | $109 |
In context: peer comparison
Among 5 peers in Williston Physician Assistant, average services per provider: 67. This provider delivers 6.9× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
134
Patients
78
Total drug cost
$2,374
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Celecoxib | Generic | 30 | 18 | $1,361 |
| Oxycodone Hcl | Generic | 25 | 20 | $135 |
| Meloxicam | Generic | 22 | 0 | $44 |
| Methocarbamol | Generic | 17 | 14 | $143 |
| Tramadol Hcl | Generic | 15 | 15 | $59 |
| Diclofenac Sodium | Generic | 14 | 0 | $597 |
| Gabapentin | Generic | 11 | 11 | $35 |
Frequently asked questions
What is Dr. Casey O'Brien's medical specialty?
Dr. Casey O'Brien practices Physician Assistant in Williston, VT.
Where does Dr. Casey O'Brien practice?
Dr. Casey O'Brien practices at 426 Industrial Ave Ste 130, Williston, VT 054954449. Office phone: 8028781175.
What is Dr. Casey O'Brien's NPI?
Dr. Casey O'Brien's National Provider Identifier (NPI) is 1073133484, issued by NPPES.
What procedures does Dr. Casey O'Brien commonly perform?
Top Medicare-reported procedures in 2023: Aspiration and/or injection of fluid from large joint (HCPCS 20610); Established patient office or other outpatient visit (HCPCS 99213); Established patient office or other outpatient visit (HCPCS 99214). Source: CMS Medicare Physician & Other Practitioners file.