Masayasu Kihira, MD PHD
NPI 1851358071 · Family Medicine Physician · San Mateo, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Masayasu Kihira, MD PHD is a Family Medicine Physician provider in San Mateo, CA (NPI 1851358071).
Provider details
- NPI number
- 1851358071
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD PHD
- Sex
- Male
- Sole proprietor
- Yes
- License
- A061938 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 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
305 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 | 147 | $110 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 95 | $9 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 32 | $154 |
| Administration of Influenza Virus VaccineG0008 | 31 | $39 |
Typical Medicare-allowed amounts for these services range $9–$154 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote 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 · 12 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 63 | 17 |
| Atorvastatin Calcium | 62 | 17 |
| Levothyroxine Sodium | 28 | — |
| Allopurinol | 20 | — |
| Simvastatin | 18 | — |
| Atenolol | 17 | — |
| Lisinopril | 17 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-05-01
- Last updated
- 2011-06-21
Frequently asked questions
- What is Masayasu Kihira's NPI number?
- Masayasu Kihira's National Provider Identifier (NPI) is 1851358071, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Masayasu Kihira's specialty?
- Masayasu Kihira is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Masayasu Kihira located?
- Masayasu Kihira's practice location on file with NPPES is 40 N San Mateo Dr, San Mateo, CA 94401-2824.
- What is Masayasu Kihira's phone number?
- The practice phone number listed in the NPPES registry for Masayasu Kihira is (650) 558-0337.
- Does Masayasu Kihira accept Medicare?
- Masayasu Kihira is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Masayasu Kihira's NPI active?
- Yes — Masayasu Kihira's NPI (1851358071) is active in the NPPES registry as of the last update on 2011-06-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.