Physician Profile
Unclaimed ProfileAbout O'BRIEN
Patrick William O'Brien, PA is a physician assistant based in Phoenix, AZ. Patrick is also listed as specialising in physician assistant — medical and physician assistant — surgical.
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 Phoenix, AZ. 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 9225 N 3RD ST STE 307 EMCARE JOHN C LINCOLN MEDICAL CENTER, Phoenix, AZ 85020. 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 (602) 870-6316. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Dr. O'Brien?
Dr. O'Brien's National Provider Identifier is 1124076757. 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 much experience does Dr. O'Brien have?
Dr. O'Brien has 20+ years experience. Registered with an NPI since 2006. 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 the Medicare record under this individual NPI shows mainly office visits and diagnostic testing. Hospital-based physicians usually have their procedural work billed by the facility rather than under their own number, so this is a floor on their practice, not a description of it. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. O'Brien's profile verified?
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
- (602) 870-6316
- Email not available
Practice Locations
9225 N 3RD ST STE 307 EMCARE JOHN C LINCOLN MEDICAL CENTER
Phoenix, AZ 85020
Procedures Most Often Billed to Medicare
85 services · 83 patients · 3 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Emergency department visit with moderate level of medical decision making | Office visit | 99284 |
51 |
| Emergency department visit with low level of medical decision making | Office visit | 99283 |
19 |
| Emergency department visit with high level of medical decision making | Office visit | 99285 |
15 |
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.
Related specialists at this location 8
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.
Other physician assistants in Phoenix 8
Same specialty, same city.
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.