Physician Profile
Unclaimed ProfileAbout O'BRIEN
Casey M O'Brien, PA-C is a physician assistant based in Williston, VT. According to Medicare claims data, Casey cared for 365 Medicare patients across 2,772 services.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Areas of Expertise
Common questions
What does Dr. O'Brien specialise in?
Dr. O'Brien is a physician assistant in Williston, VT. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “Physician Assistant”.
NPI registry
Where is Dr. O'Brien located?
Dr. O'Brien is listed at 426 INDUSTRIAL AVE STE 130, Williston, VT 05495. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. O'Brien's phone number?
The number on file is (802) 878-1175. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. O'Brien's NPI number?
Dr. O'Brien's National Provider Identifier is 1073133484. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
How long has Dr. O'Brien been practising?
Dr. O'Brien has 6+ years experience. Registered with an NPI since 2020. National Provider Identifiers only began in 2005, so a provider who qualified earlier may have practised for longer than this.
NPI registry
What does Dr. O'Brien do most often?
According to Medicare billing data, Dr. O'Brien performs procedures including aspiration and/or injection of fluid from large joint; reads or performs imaging such as x-ray of knee, 4 or more views and x-ray of shoulder, minimum of 2 views, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. O'Brien confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. O'Brien. If this is you, claiming it is free.
Guide.md
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (802) 878-1175
- Email not available
Practice Locations
426 INDUSTRIAL AVE STE 130
Williston, VT 05495
Procedures Most Often Billed to Medicare
2,772 services · 365 patients · 11 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Aspiration and/or injection of fluid from large joint | Procedure | 20610 |
85 |
| Aspiration and/or injection of fluid from large joint | Procedure | 20610 |
19 |
| X-ray of knee, 4 or more views | Imaging | 73564 |
22 |
| X-ray of shoulder, minimum of 2 views | Imaging | 73030 |
14 |
| X-ray of lower and sacral spine, minimum of 4 views | Imaging | 72110 |
11 |
| Injection, methylprednisolone acetate, 1 mg | Drug given | J1010 |
2,280 |
| Injection, triamcinolone acetonide, not otherwise specified, 10 mg | Drug given | J3301 |
98 |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
143 |
| New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more | Office visit | 99203 |
48 |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
33 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
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Claim this profileRelated providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other physician assistants at this location 4
Same specialty, same street address — most likely the same department or group.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other physician assistants in Williston 6
Same specialty, same city.
More connections — 8 related providers in 1 group
Also performs Aspiration and/or injection of fluid from large joint 8
Providers in VT who bill this service to Medicare most often.
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.