Hiroyu Hatano, M.D.
NPI 1871631507 · Internal Medicine Physician · Palo Alto, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Hiroyu Hatano, M.D. is a Internal Medicine Physician provider in Palo Alto, CA (NPI 1871631507).
Provider details
- NPI number
- 1871631507
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- A87614 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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 · 13 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Gabapentin | 29 |
| Levothyroxine Sodiumbrand: Synthroid | 28 |
| Losartan Potassium | 26 |
| Atorvastatin Calcium | 24 |
| Lorazepam | 23 |
| Amlodipine Besylate | 20 |
| Rosuvastatin Calcium | 19 |
| Levothyroxine Sodium | 17 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-02-02
- Last updated
- 2023-05-30
- Certified
- 2023-05-30
Frequently asked questions
- What is Hiroyu Hatano's NPI number?
- Hiroyu Hatano's National Provider Identifier (NPI) is 1871631507, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Hiroyu Hatano's specialty?
- Hiroyu Hatano is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Hiroyu Hatano located?
- Hiroyu Hatano's practice location on file with NPPES is 3200 Middlefield Rd Ste C, Palo Alto, CA 94306-3000.
- What is Hiroyu Hatano's phone number?
- The practice phone number listed in the NPPES registry for Hiroyu Hatano is (650) 850-4111.
- Does Hiroyu Hatano accept Medicare?
- Hiroyu Hatano is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Hiroyu Hatano's NPI active?
- Yes — Hiroyu Hatano's NPI (1871631507) is active in the NPPES registry as of the last update on 2023-05-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.