Waii Mak, MD
Hospitalist Physician · Santa Clara, CA
Waii Mak, MD is a hospitalist physician with a practice address in Santa Clara, California, and NPI 1699825406, issued on Jan 12, 2007. Check the license (California A72101, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Waii Mak
- Credential
- MD
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License number
- A72101 CA
Self-reported in NPPES; status is on the state search - Practice location
- 900 Kiely Blvd, Santa Clara, CA 95051
- Phone
- (408) 236-6400
- Enumerated
- Jan 12, 2007
- Record last updated
- Dec 17, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicaid ID
- 00A721010 CA
- Medicare enrollment
- Enrolled (PECOS I20110129000010); accepts Medicare assignment
- Medical or professional school
- New York Medical College, 1996
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 3,099 in California → Look up another NPI →
Also registered at 900 Kiely Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Waii Mak in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A72101Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
94% fewer Medicare Part D claims than the average hospitalist physician in 2024
31 Medicare Part D claims for 18 beneficiaries, against an average of 521 among the 21,613 providers of this specialty who prescribed in Part D.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Permanente Medical Group IncWatsonville, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Waii Mak among 3,099 hospitalist physician records in California
Waii Mak, MD is one of 3,099 hospitalist physician records with a practice address in California. 90% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 27% of them.
- NPI issued2007 · 27% of these records are older, 66% newer
- In a Medicare fileYes · 90% of these records are
- In the CMS Doctors and Clinicians fileYes · 81% of these records are
- Graduated1996 · median 2010 among the 2,505 with a school on file
- Record last updated2021 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
41 hospitalist physician records list a practice address in Santa Clara
They are 41 of the 3,436 NPPES records with a practice address in Santa Clara, and 3,099 hospitalist physician records in California.
All 3,099 in California → Every provider in Santa Clara → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
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- Radha Ivaturi, MDSanta Clara, CA 950511972680809
- Andrea Juth, MDSanta Clara, CA 950511467539312
- Ashwini Mahajan, MDSanta Clara, CA 950511659458503
- Susanne Mierendorf, MDSanta Clara, CA 950511447337373
Common questions
What is Waii Mak, MD's NPI number?
Waii Mak, MD's National Provider Identifier (NPI) is 1699825406, issued on Jan 12, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Waii Mak, MD located?
The NPPES record lists a practice address at 900 Kiely Blvd, Santa Clara, CA, 95051. Phone: (408) 236-6400. Providers update this record themselves, so call before visiting.
How can I verify Waii Mak, MD's license?
NPPES lists California license number A72101, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Waii Mak, MD prescribe under Medicare Part D?
In 2024, Waii Mak, MD had 31 Medicare Part D claims for 18 beneficiaries; the average among hospitalist physician prescribers was 521. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.