Mark Tadashi Nii, D.D.S.
Dentist · Daly City, CA
Mark Tadashi Nii, D.D.S. is a dentist with a practice address in Daly City, California, and NPI 1073764742, issued on Sep 30, 2008. Check the license (California 40479, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Mark Tadashi Nii
- Credential
- D.D.S.
- Primary taxonomy
- Dentist 122300000X
- License number
- 40479 CA
Self-reported in NPPES; status is on the state search - Practice location
- 341 Westlake Ctr, Daly City, CA 94015
- Phone
- (650) 755-3230
- Enumerated
- Sep 30, 2008
- Record last updated
- Sep 30, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (650) 755-7678
- Entity
- Type 1 · individual
8 nearest dentist records → All 14,729 in California → Look up another NPI →
Also registered at 341 Westlake Ctr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Robert Storey, D.D.M.Denturist1255500641
- Shin Hee Van Lieu, L.ACAcupuncturist1720383409
Verify Mark Tadashi Nii in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 40479Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
43% fewer Medicare Part D claims than the average dentist in 2024
49 Medicare Part D claims for 31 beneficiaries, against an average of 86 among the 51,021 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Amoxicillin21 claims
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.
Mark Tadashi Nii among 14,729 dentist records in California
Mark Tadashi Nii, D.D.S. is one of 14,729 dentist records with a practice address in California. 56% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 42% of them.
- NPI issued2008 · 42% of these records are older, 52% newer
- In a Medicare fileYes · 56% of these records are
- In the CMS Doctors and Clinicians fileNo · under 1% of these records are
- Record last updated2008 · 73% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 122300000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
39 dentist records list a practice address in Daly City
They are 39 of the 1,606 NPPES records with a practice address in Daly City, and 14,729 dentist records in California.
All 14,729 in California → Every provider in Daly City → Dentist nationwide →
The 8 dentist records with the nearest ZIP codes
- Marjorie Ahn, DDSDaly City, CA 940151689889172
- Kimberly Benton, DDSDaly City, CA 940151558492983
- Charles Conley, DMDDaly City, CA 940151407061617
- Luis Kong, D.D.S.Daly City, CA 940151194922583
- Samuel Leung, DDSDaly City, CA 940151245244037
- Homero Mak, DDSDaly City, CA 940151912049438
- Pons Materum, DDSDaly City, CA 940151962524967
- Eleazar Panopio, D.M.DDaly City, CA 940151831318351
Common questions
What is Mark Tadashi Nii, D.D.S.'s NPI number?
Mark Tadashi Nii, D.D.S.'s National Provider Identifier (NPI) is 1073764742, issued on Sep 30, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Mark Tadashi Nii, D.D.S. located?
The NPPES record lists a practice address at 341 Westlake Ctr, Daly City, CA, 94015. Phone: (650) 755-3230. Providers update this record themselves, so call before visiting.
How can I verify Mark Tadashi Nii, D.D.S.'s license?
NPPES lists California license number 40479, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Mark Tadashi Nii, D.D.S. prescribe under Medicare Part D?
In 2024, Mark Tadashi Nii, D.D.S. had 49 Medicare Part D claims for 31 beneficiaries; the average among dentist prescribers was 86. 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.