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Edit this profileAt a glance
- 2900 12Th Ave N, Suite 140W, Billings, MT 59101
About Mark Sullivan
Mark T. Sullivan, PA-C is a physician assistant based in Billings, MT. According to Medicare claims data, Mark cared for 589 Medicare patients across 1,108 services. The services billed most often include injection, triamcinolone acetonide, not otherwise specified, 10 mg, established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more, and established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more. The provider's National Provider Identifier (NPI) is 1952393514.
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
- (406) 238-6540
- Email not available
Practice Locations
2900 12TH AVE N SUITE 140W
Billings, MT 59101
Procedures Most Often Billed to Medicare
1,108 services · 589 patients · 14 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Replacement of knee joint, both sides of knee | Procedure | 27447 |
59 | More often than most peers in Physician Assistant |
| Computer-assisted surgery for muscle and bone procedure | Procedure | 20985 |
57 | More often than most peers in Physician Assistant |
| Aspiration and/or injection of fluid from large joint | Procedure | 20610 |
52 | As often as other peers in Physician Assistant |
| Replacement of thigh bone and hip joint with prosthesis | Procedure | 27130 |
25 | As often as other peers in Physician Assistant |
| X-ray of lower and sacral spine, minimum of 4 views | Imaging | 72110 |
40 | As often as other peers in Physician Assistant |
| X-ray of knee, 4 or more views | Imaging | 73564 |
36 | As often as other peers in Physician Assistant |
| X-ray of hip, 2-3 views | Imaging | 73502 |
32 | As often as other peers in Physician Assistant |
| X-ray of knee, 3 views | Imaging | 73562 |
21 | Less often than most peers in Physician Assistant |
| Mri scan of lower spinal canal without contrast | Imaging | 72148 |
12 | Less often than most peers in Physician Assistant |
| Injection, triamcinolone acetonide, not otherwise specified, 10 mg | Drug given | J3301 |
534 | 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 6
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 — 31 related providers in 4 groups
Other physician assistants in Billings 8
Same specialty, same city.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 1999 at Other 8
Providers who graduated from the same medical school in the same year.
Also performs Replacement of knee joint, both sides of knee 7
Providers in MT who bill this service to Medicare most often.
Common questions
What is Mark T. Sullivan's specialty?
Mark T. Sullivan is a physician assistant in Billings, MT. That is the designation recorded for this NPI in the federal registry.
NPI registry
Where can I find Mark T. Sullivan?
Mark T. Sullivan is listed at 2900 12Th Ave N Suite 140W, Billings, MT 59101. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Mark T. Sullivan?
The number on file is (406) 238-6540. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Mark T. Sullivan's NPI number?
Mark T. Sullivan's National Provider Identifier is 1952393514. 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
What is Mark T. Sullivan's education?
Mark T. Sullivan attended Other, graduating in 1999. This comes from the CMS National Downloadable File.
CMS public data
How long has Mark T. Sullivan been practicing?
Mark T. Sullivan has 27 years experience. Calculated from a graduation year of 1999, reported in the CMS National Downloadable File.
CMS public data
What is Mark T. Sullivan known for?
According to Medicare billing data, Mark T. Sullivan performs procedures including replacement of knee joint, both sides of knee, computer-assisted surgery for muscle and bone procedure and aspiration and/or injection of fluid from large joint; reads or performs imaging such as x-ray of lower and sacral spine, minimum of 4 views and x-ray of knee, 4 or more views, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Mark T. Sullivan confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Mark T. Sullivan. If this is you, claiming it is free.
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