Michael Y. Chan, DDS
Oral & Maxillofacial Surgeons (Oral and Maxillofacial Surgery (Dentist))
Medicare and federal program status
Opted out of Medicare from June 7, 2017 through June 7, 2027. Medicare does not pay for this clinician’s services: patients with Medicare sign a private contract and pay the clinician directly. They can still order tests and refer Medicare patients to other providers.
Source: CMS Medicare Opt Out Affidavits (record last updated July 15, 2025). Opting out is a legal choice many clinicians make, often to run a cash or concierge practice.
At a glance
- In the NPI registry since
- 2006
The NPI date is when this clinician registered for a National Provider Identifier, the billing number used on health claims. It is not a license, graduation or board-certification date. NPIs were first issued in May 2005 and became required on claims in 2007–2008, so an early date usually means the clinician was already in practice before then. What an NPI is
Education and training
- 2006Registered with an NPI (national billing number; not a license date) — NPIs began in 2005, so practice likely started earlier
Medicare’s Care Compare data doesn’t list this clinician’s medical school. Undergraduate school, residency, fellowship, licensing exams and board certification aren’t in public federal data. Board certification can be confirmed with the certifying board (ABMS member boards for MDs, AOA boards for DOs).
Specialties and state licenses
-
Oral and Maxillofacial Surgery (Dentist) primary
CA license 47599
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Medicare prescriptions
| Drug | Prescriptions |
|---|---|
| Amoxicillin Other prescribers in San Francisco, CA | 98 |
| Ibuprofen Other prescribers in San Francisco, CA | 83 |
| Hydrocodone-Acetaminophen (hydrocodone/acetaminophen) Other prescribers in San Francisco, CA | 82 |
| Chlorhexidine Gluconate Other prescribers in San Francisco, CA | 30 |
Prescriptions filled under Medicare Part D, including refills. CMS leaves out drugs prescribed fewer than 11 times.
Payments from drug and device companies
In 2025, 2 companies reported 8 payments worth $572 in total to this clinician.
| Keystone Dental Inc. | $403 |
|---|---|
| Straumann USA LLC | $169 |
| Entertainment | $403 |
|---|---|
| Food and Beverage | $169 |
What the payments were for
| Company | What it was for | Amount |
|---|---|---|
| Keystone Dental Inc. Mar 27, 2025 | Entertainment | $211 |
| Keystone Dental Inc. May 13, 2025 | Entertainment | $153 |
| Keystone Dental Inc. Sep 11, 2025 | Entertainment | $39.51 |
Each payment as the company reported it, with the products it named. Meals are counted in the totals above but not listed one by one.
From CMS Open Payments. A payment is not evidence of wrongdoing; many are for consulting, teaching or meals. Clinicians can review and dispute their records with CMS.