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Edit this profileAt a glance
- 1139 E Sonterra Blvd Ste 205, San Antonio, TX 78258
About Dr. Casillas
Based in San Antonio, TX, Mark M. Casillas, M.D. is listed in the NPI registry under orthopaedic foot & ankle surgery. Mark graduated from University of Texas Medical School at San Antonio in 1991. Mark is also listed as specializing in orthopaedic surgery. Medicare claims data shows Mark provided 1,885 services to 1,000 patients. The services billed most often include injection, methylprednisolone acetate, 1 mg, x-ray of foot, minimum of 3 views, and established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more. NPI 1598709305 identifies this record in the national registry.
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
- (210) 874-3359
- Email not available
Practice Locations
1139 E SONTERRA BLVD STE 205
San Antonio, TX 78258
Procedures Most Often Billed to Medicare
1,885 services · 1,000 patients · 15 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Correction of toe joint deformity | Procedure | 28285 |
26 | As often as other peers in Orthopaedic Foot & Ankle Surgery |
| Incision of achilles tendon under anesthesia | Procedure | 27606 |
21 | Too few peers to compare |
| Reconstruction of ankle joint with prosthesis | Procedure | 27702 |
20 | More than most peers in Orthopaedic Foot & Ankle Surgery |
| Fusion of big toe at joint with foot | Procedure | 28750 |
17 | As often as other peers in Orthopaedic Foot & Ankle Surgery |
| X-ray of foot, minimum of 3 views | Imaging | 73630 |
338 | More often than most peers in Orthopaedic Foot & Ankle Surgery |
| X-ray of ankle, minimum of 3 views | Imaging | 73610 |
219 | More often than most peers in Orthopaedic Foot & Ankle Surgery |
| Injection, methylprednisolone acetate, 1 mg | Drug given | J1010 |
600 | Less often than most peers in Orthopaedic Foot & Ankle Surgery |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
303 | More often than most peers in Orthopaedic Foot & Ankle Surgery |
| New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more | Office visit | 99203 |
124 | More than most peers in Orthopaedic Foot & Ankle Surgery |
| Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more | Office visit | 99212 |
64 | More often than most peers in Orthopaedic Foot & Ankle Surgery |
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.
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 orthopaedic foot & ankle surgeons in San Antonio 4
Same specialty, same city.
Trained at University of Texas Medical School at San Antonio 6
Other providers in the same specialty who trained at the same institution.
More connections — 15 related providers in 2 groups
Class of 1991 at University of Texas Medical School at San Antonio 8
Providers who graduated from the same medical school in the same year.
Also performs Correction of toe joint deformity 7
Providers in TX who bill this service to Medicare most often.
Common questions
What kind of doctor is Mark M. Casillas?
Mark M. Casillas is an orthopaedic foot & ankle surgeon in San Antonio, TX. That is the designation recorded for this NPI in the federal registry, where it is listed as “Orthopaedic Foot & Ankle Surgery”.
NPI registry
What is Mark M. Casillas's address?
Mark M. Casillas is listed at 1139 E Sonterra Blvd Ste 205, San Antonio, TX 78258. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Mark M. Casillas?
The number on file is (210) 874-3359. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for Mark M. Casillas?
Mark M. Casillas's National Provider Identifier is 1598709305. 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 Mark M. Casillas train?
Mark M. Casillas attended University of Texas Medical School at San Antonio, graduating in 1991. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Mark M. Casillas have?
Mark M. Casillas has 35 years experience. Calculated from a graduation year of 1991, reported in the CMS National Downloadable File.
CMS public data
What procedures does Mark M. Casillas perform?
According to Medicare billing data, Mark M. Casillas performs procedures including correction of toe joint deformity, incision of achilles tendon under anesthesia and reconstruction of ankle joint with prosthesis; reads or performs imaging such as x-ray of foot, minimum of 3 views and x-ray of ankle, minimum of 3 views, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Mark M. Casillas's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Mark M. Casillas. If this is you, claiming it is free.
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