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Edit this profileAt a glance
- 426 Industrial Ave Ste 130, Williston, VT 05495
About Casey 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. The services billed most often include injection, methylprednisolone acetate, 1 mg, established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more, and injection, triamcinolone acetonide, not otherwise specified, 10 mg. The provider's National Provider Identifier (NPI) is 1073133484.
Factual summary compiled by Guide.md from public records; not written by this provider.
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
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 | Compared with peers |
|---|---|---|---|---|
| Aspiration and/or injection of fluid from large joint | Procedure | 20610 |
85 | More often than most peers in Physician Assistant |
| Aspiration and/or injection of fluid from large joint | Procedure | 20610 |
19 | More often than most peers in Physician Assistant |
| X-ray of knee, 4 or more views | Imaging | 73564 |
22 | Less often than most peers in Physician Assistant |
| X-ray of shoulder, minimum of 2 views | Imaging | 73030 |
14 | Less often than most peers in Physician Assistant |
| X-ray of lower and sacral spine, minimum of 4 views | Imaging | 72110 |
11 | Less often than most peers in Physician Assistant |
| Injection, methylprednisolone acetate, 1 mg | Drug given | J1010 |
2,280 | As often as other peers in Physician Assistant |
| Injection, triamcinolone acetonide, not otherwise specified, 10 mg | Drug given | J3301 |
98 | As often as other peers in Physician Assistant |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
143 | More often than most peers in Physician Assistant |
| 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 | More often than most peers in Physician Assistant |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
33 | As often as other peers in Physician Assistant |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related 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.
Related specialists at this location 3
Clinically related specialties at the same address — the people this provider most likely works alongside.
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.
More connections — 14 related providers in 2 groups
Other physician assistants in Williston 6
Same specialty, same city.
Also performs Aspiration and/or injection of fluid from large joint 8
Providers in VT who bill this service to Medicare most often.
Common questions
What does Casey M. O'Brien specialize in?
Casey M. O'Brien is a physician assistant in Williston, VT. That is the designation recorded for this NPI in the federal registry.
NPI registry
Where is Casey M. O'Brien located?
Casey M. 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 Casey M. O'Brien's phone number?
The number on file is (802) 878-1175. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Casey M. O'Brien's NPI number?
Casey M. 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 Casey M. O'Brien been practicing?
Casey M. 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 practiced for longer than this.
NPI registry
What does Casey M. O'Brien do most often?
According to Medicare billing data, Casey M. 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 Casey M. O'Brien confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Casey M. O'Brien. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.