Mark Tsang, DDS
NPI 1457424327 · Dentist · San Francisco, CA
Mark Tsang, DDS is a Dentist provider in San Francisco, CA (NPI 1457424327).
Provider details
- NPI number
- 1457424327
- Entity type
- Individual
- Primary specialty
- DentistDental Providers
- Credential
- DDS
- Sex
- Male
- Sole proprietor
- No
- License
- 44637 (CA)
Specialties & taxonomies
Dental Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 3 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amoxicillin | 42 | 37 |
| Chlorhexidine Gluconate | 19 | — |
| Ibuprofen | 14 | 12 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-16
- Last updated
- 2010-01-22
Frequently asked questions
- What is Mark Tsang's NPI number?
- Mark Tsang's National Provider Identifier (NPI) is 1457424327, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Tsang's specialty?
- Mark Tsang is listed in the NPPES registry with a primary specialty of Dentist (Dental Providers).
- Where is Mark Tsang located?
- Mark Tsang's practice location on file with NPPES is 950 Stockton Street, San Francisco, CA 94108-1619.
- What is Mark Tsang's phone number?
- The practice phone number listed in the NPPES registry for Mark Tsang is (415) 986-8899.
- Is Mark Tsang's NPI active?
- Yes — Mark Tsang's NPI (1457424327) is active in the NPPES registry as of the last update on 2010-01-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.