Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Dr. Michael S Chang, MD

Individual provider Orthopaedic Surgery of the Spine Physician · NPI 1154522910

Dr. Michael S Chang, MD practises Orthopedic Surgery in Mesa, Arizona. Graduated from Harvard Medical School in 2003, 23 years ago. Practices with Honorhealth Ambulatory, a 625-clinician group and accepts Medicare assignment. Licensed in Arizona and Missouri.

Years since qualifying
23
Trained at
Harvard Medical School
Licensed in
AZ, MO
In the registry since
2007
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

1462 S Dobson Rd Ste 201
Mesa, AZ 85202 Not confirmed with CMS for 14 years — call before visiting
Phone: (480) 962-0071
Fax: (480) 962-0590
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Orthopaedic Surgery of the Spine Physician (primary) Taxonomy 207XS0117X · Licence 41769 (AZ)
Orthopaedic Surgery of the Spine Physician Taxonomy 207XS0117X · Licence 2008004914 (MO)

Record details

NPI number1154522910
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 30, 2007
Last updated in NPPESJune 22, 2012

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyORTHOPEDIC SURGERY
Medical schoolHARVARD MEDICAL SCHOOL
Graduated 2003 (23 years in practice)
Group practice Honorhealth Ambulatory — 625 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Spinal fusion 310 times · 96th percentile
Laminectomy or laminotomy (partial removal of spine bones) 71 times · 87th percentile

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients171
Services billed 974 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Royalty or License $73,187 7 payments · paid for the use of something the clinician owns or invented, such as a patent; not a fee for care or for time
Consulting Fee $49,385 11 payments
Travel and Lodging $10,158 25 payments · travel or lodging paid or reimbursed, such as to attend a conference
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 · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Colleagues at Honorhealth Ambulatory

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 625 clinicians in the practice; 12 are shown here.

Other providers in Mesa