Michael S. Chang, MD
NPI 1154522910ActiveIndividual· Orthopaedic Surgery, Orthopaedic Surgery of the Spine· Mesa, AZ
Orthopaedic Surgery, Orthopaedic Surgery of the Spine (MD) in Mesa, Arizona, trained at Harvard Medical School (class of 2003). In 2024 Medicare paid $331,850 for 171 patients, and Part D covered 124 of their prescriptions, 65% of them generic. Mirus, LLC was the largest of 18 companies reporting payments in 2025, $136,798 in all, mostly royalties and licenses.
Overview
| NPI | 1154522910 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | May 30, 2007 |
| Last updated in NPPES | Jun 22, 2012 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Orthopaedic Surgery, Orthopaedic Surgery of the Spine Primary | 207XS0117X | 41769 | AZ |
| Orthopaedic Surgery, Orthopaedic Surgery of the Spine | 207XS0117X | 2008004914 | MO |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Orthopedic Surgery (AZ) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 171 |
|---|---|
| Services billed | 974 across 66 procedure codes |
| Paid by Medicare | $331,850 |
Part D prescriptions in 2024
| Prescriptions (claims) | 124 · 144 30-day fills |
|---|---|
| Patients | 48 |
| Total drug cost | $137,706 |
| Generic share | 65% of claims |
Education and affiliations
| Medical school | Harvard Medical School |
|---|---|
| Graduation year | 2003 |
| Medicare specialty | Orthopedic Surgery |
Medical group
- Honorhealth AmbulatoryScottsdale, AZ · 630 clinicians
Hospital affiliations
- Arizona Orthopedic and Surgical Specialty HospitalPhoenix, AZ
- Honorhealth Scottsdale Shea Medical CenterScottsdale, AZ
Industry payments (Open Payments)
- 2025$136,798 · 79 payments from 18 companies
- 2024$80,742 · 60 payments from 16 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Mirus, LLC | $56,179 | 8 |
| Vb Spine LLC | $39,372 | 19 |
| Zavation Medical Products, LLC | $23,781 | 5 |
| Stryker Corporation | $13,803 | 15 |
| Medtronic, Inc. | $1,446 | 14 |
What the 2025 payments were for
- Royalty or License$73,187 · 7 payments
- Consulting Fee$49,385 · 11 payments
- Travel and Lodging$10,158 · 25 payments
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$2,750 · 2 payments
- Food and Beverage$1,318 · 34 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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