Hiroyu Hatano, M.D.
Internal Medicine Physician · Palo Alto, CA
Hiroyu Hatano, M.D. is an internal medicine physician with a practice address in Palo Alto, California, and NPI 1871631507, issued on Feb 2, 2007. Check the license (California A87614, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Hiroyu Hatano
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A87614 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3200 Middlefield RD Ste C, Palo Alto, CA 94306
- Phone
- (650) 850-4111
- Enumerated
- Feb 2, 2007
- Record last updated
- May 30, 2023
- Fax
- (650) 666-8219
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Verify Hiroyu Hatano in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A87614Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
87% fewer Medicare Part D claims than the average internal medicine physician in 2024
427 Medicare Part D claims for 26 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 24% of claims.
Most prescribed
- Gabapentin29 claims
- Synthroid28 claims
- Losartan Potassium26 claims
- Atorvastatin Calcium24 claims
- Lorazepam23 claims
- Amlodipine Besylate20 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Hiroyu Hatano among 17,696 internal medicine physician records in California
Hiroyu Hatano, M.D. is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 44% of them.
- NPI issued2007 · 44% of these records are older, 44% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2023 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
187 internal medicine physician records list a practice address in Palo Alto
They are 187 of the 7,617 NPPES records with a practice address in Palo Alto, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Palo Alto → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Patricia Allemann, M.D.Palo Alto, CA 943061265524433
- Sonia Bajwa-DulaiPalo Alto, CA 943061336429711
- Carlos Feder, M.D.Palo Alto, CA 943061225310238
- Stephanie Higgins, M.D.Palo Alto, CA 943061336275031
- Henry Lew, M.D.Palo Alto, CA 943061144596842
- Michael Nierenberg, MDPalo Alto, CA 943061790834133
- Bradford Rabin, MDPalo Alto, CA 943061831139815
- Sally Rubenstone, MDPalo Alto, CA 943061235239740
Common questions
What is Hiroyu Hatano, M.D.'s NPI number?
Hiroyu Hatano, M.D.'s National Provider Identifier (NPI) is 1871631507, issued on Feb 2, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Hiroyu Hatano, M.D. located?
The NPPES record lists a practice address at 3200 Middlefield RD Ste C, Palo Alto, CA, 94306. Phone: (650) 850-4111. Providers update this record themselves, so call before visiting.
How can I verify Hiroyu Hatano, M.D.'s license?
NPPES lists California license number A87614, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Hiroyu Hatano, M.D. prescribe under Medicare Part D?
In 2024, Hiroyu Hatano, M.D. had 427 Medicare Part D claims for 26 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.