Physician Profile
Mai-Khanh Bui-Duy, M.D. is a healthcare provider in Watsonville, CA specializing in internal medicine. Medicare claims data shows Mai-Khanh provided 435 services to 340 patients. The services billed most often include hemoglobin a1c level, blood glucose (sugar) level, and annual alcohol misuse screening, 5 to 15 minutes. This provider record is associated with NPI 1275858409.
Factual summary compiled by Guide.md from public records; not written by this provider.
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
45 NEILSON ST
Watsonville, CA 95076
1545 Divisadero Street
San Francisco, CA 94143
Within Internal Medicine generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Most searched conditions
Cardiometabolic
Digestive and liver
Endocrine, blood, and bone
Infectious disease
Kidney and urinary
Respiratory
Blood & Circulation
Blood disorders
Brain & Nerves
Brain and nerves
Cardiac and vascular
Digestive
Heart & Circulation
Infections
Kidney & Bladder
Lungs & Breathing
Mental Health
Neurologic and behavioral
Pain
Rheumatologic and pain
Most searched procedures
Preventive and evaluation
Screening and diagnostic testing
Bones & Joints
Brain and nerves
Cancer screening
Digestive
Exams & Consultations
Heart & Circulation
Heart health
Imaging referral
Immunizations
Lab tests
Lungs & Breathing
Metabolic & Weight
Minor procedures
Office procedures
Office Procedures
Pain management
Preventive & Routine Care
Screenings & Diagnostics
Sexual health
435 services · 340 patients · 5 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Hemoglobin a1c level | Lab test | 83036 |
168 | More often than most peers in Internal Medicine |
| Blood glucose (sugar) level | Lab test | 82947 |
117 | More often than most peers in Internal Medicine |
| Annual alcohol misuse screening, 5 to 15 minutes | Billing code | G0442 |
106 | More often than most peers in Internal Medicine |
| Detection test by immunoassay technique for severe acute respiratory syndrome coronavirus and influenza | Lab test | 87428 |
26 | More often than most peers in Internal Medicine |
| Detection test by immunoassay with direct visual observation for streptococcus, group a (strep) | Lab test | 87880 |
18 | As often as other peers in Internal Medicine |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Mai-Khanh Bui-Duy is an internist in Watsonville, CA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Internal Medicine”.
NPI registry
Mai-Khanh Bui-Duy is listed at 45 Neilson St, Watsonville, CA 95076. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
The number on file is (831) 728-0222. Contact the office directly to confirm availability and scheduling.
NPI registry
Mai-Khanh Bui-Duy's National Provider Identifier is 1275858409. 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
Mai-Khanh Bui-Duy has 16+ years experience. Registered with an NPI since 2010. National Provider Identifiers only began in 2005, so a provider who qualified earlier may have practiced for longer than this.
NPI registry
According to Medicare billing data, Mai-Khanh Bui-Duy the Medicare record under this individual NPI shows mainly office visits and diagnostic testing. Hospital-based physicians usually have their procedural work billed by the facility rather than under their own number, so this is a floor on their practice, not a description of it. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Not yet. This profile is built from public federal data and has not been confirmed by Mai-Khanh Bui-Duy. If this is you, claiming it is free.
Guide.md
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