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Edit this profileAt a glance
- 3851 Katella Ave Ste 255, Los Alamitos, CA 90720
About Sean Mickelsen
Sean Mickelsen, PA-C is a physician assistant practicing in Los Alamitos, CA. Sean trained at Jefferson Medical College of Thomas Jefferson University, graduating in 2021. According to Medicare claims data, Sean cared for 209 Medicare patients across 254 services. The services billed most often include established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more, complete ultrasound study of arm and leg arteries, and testing of autonomic (sympathetic) nervous system function. This provider record is associated with NPI 1538839246.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
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
- (562) 732-4578
- Email not available
Is this your home address or personal number? Hide it
Practice Locations
3851 KATELLA AVE STE 255
Los Alamitos, CA 90720
Procedures Most Often Billed to Medicare
254 services · 209 patients · 5 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Insertion of cage or mesh device to spine bone and disc space during spine fusion | Procedure | 22853 |
15 | Less often than most peers in Physician Assistant |
| Placement of stabilizing device to front, 2-3 spine bone segments | Procedure | 22845 |
14 | As often as other peers in Physician Assistant |
| Complete ultrasound study of arm and leg arteries | Treatment | 93923 |
46 | Too few peers to compare |
| Testing of autonomic (sympathetic) nervous system function | Treatment | 95923 |
43 | 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 |
136 | More often than most 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 4
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 — 29 related providers in 4 groups
Other physician assistants in Los Alamitos 6
Same specialty, same city.
Trained at Jefferson Medical College of Thomas Jefferson University 8
Other providers in the same specialty who trained at the same institution.
Class of 2021 at Jefferson Medical College of Thomas Jefferson University 7
Providers who graduated from the same medical school in the same year.
Also performs Insertion of cage or mesh device to spine bone and disc space during spine fusion 8
Providers in CA who bill this service to Medicare most often.
Common questions
What does Sean Mickelsen specialize in?
Sean Mickelsen is a physician assistant in Los Alamitos, CA. That is the designation recorded for this NPI in the federal registry.
NPI registry
Where is Sean Mickelsen located?
Sean Mickelsen is listed at 3851 Katella Ave Ste 255, Los Alamitos, CA 90720. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Sean Mickelsen's phone number?
The number on file is (562) 732-4578. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Sean Mickelsen's NPI number?
Sean Mickelsen's National Provider Identifier is 1538839246. 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
Where did Sean Mickelsen train?
Sean Mickelsen attended Jefferson Medical College of Thomas Jefferson University, graduating in 2021. This comes from the CMS National Downloadable File.
CMS public data
How long has Sean Mickelsen been practicing?
Sean Mickelsen has 5 years experience. Calculated from a graduation year of 2021, reported in the CMS National Downloadable File.
CMS public data
What does Sean Mickelsen do most often?
According to Medicare billing data, Sean Mickelsen performs procedures including insertion of cage or mesh device to spine bone and disc space during spine fusion and placement of stabilizing device to front, 2-3 spine bone segments; provides treatments such as complete ultrasound study of arm and leg arteries and testing of autonomic nervous system function, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Sean Mickelsen confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Sean Mickelsen. If this is you, claiming it is free.
Guide.md
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