May Yau, M.D.
NPI 1689786675 · Internal Medicine Physician · San Francisco, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
May Yau, M.D. is a Internal Medicine Physician provider in San Francisco, CA (NPI 1689786675).
Provider details
- NPI number
- 1689786675
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- G70229 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
1,060 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. 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 does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 327 | $154 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 142 | $156 |
| Annual Depression Screening, 5 to 15 MinutesG0444 | 140 | $24 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 105 | $110 |
| Administration of Influenza Virus VaccineG0008 | 67 | $39 |
| Admn Sarscov2 Vacc 1 Dose90480 | 56 | $52 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 48 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 453 | 125 |
| Amlodipine Besylate | 213 | 60 |
| Losartan Potassium | 189 | 52 |
| Levothyroxine Sodium | 153 | 34 |
| Metoprolol Succinate | 114 | 30 |
| Lisinopril | 104 | 27 |
| Alendronate Sodium |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-31
- Last updated
- 2007-07-08
Frequently asked questions
- What is May Yau's NPI number?
- May Yau's National Provider Identifier (NPI) is 1689786675, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is May Yau's specialty?
- May Yau is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is May Yau located?
- May Yau's practice location on file with NPPES is 2100 Webster St Ste 423, San Francisco, CA 94115-2380.
- What is May Yau's phone number?
- The practice phone number listed in the NPPES registry for May Yau is (415) 923-3179.
- Does May Yau accept Medicare?
- May Yau is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is May Yau's NPI active?
- Yes — May Yau's NPI (1689786675) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.