Xiao (shana) Yao, MD
NPI 1639106495 · Family Medicine Physician · Mountain View, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Xiao (shana) Yao, MD is a Family Medicine Physician provider in Mountain View, CA (NPI 1639106495).
Provider details
- NPI number
- 1639106495
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- A75779 (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
506 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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 215 | $111 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 144 | $153 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 88 | $157 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 45 | $215 |
| Administration of Influenza Virus VaccineG0008 | 14 | $39 |
Typical Medicare-allowed amounts for these services range $39–$215 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 37 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 294 | 89 |
| Amlodipine Besylate | 143 | 45 |
| Losartan Potassium | 135 | 41 |
| Levothyroxine Sodium | 119 | 33 |
| Metformin Hclbrand: Metformin Hcl Er | 79 | 23 |
| Alendronate Sodium | 59 | 21 |
| Lisinopril |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-06-27
- Last updated
- 2011-12-01
Frequently asked questions
- What is Xiao (shana) Yao's NPI number?
- Xiao (shana) Yao's National Provider Identifier (NPI) is 1639106495, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Xiao (shana) Yao's specialty?
- Xiao (shana) Yao is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Xiao (shana) Yao located?
- Xiao (shana) Yao's practice location on file with NPPES is 701 E El Camino Real, Mountain View, CA 94040-2833.
- What is Xiao (shana) Yao's phone number?
- The practice phone number listed in the NPPES registry for Xiao (shana) Yao is (650) 404-8370.
- Does Xiao (shana) Yao accept Medicare?
- Xiao (shana) Yao is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Xiao (shana) Yao's NPI active?
- Yes — Xiao (shana) Yao's NPI (1639106495) is active in the NPPES registry as of the last update on 2011-12-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.