Amy Sawyer Daniher, M.D.
Internal Medicine Physician · San Mateo, CA
Amy Sawyer Daniher, M.D. is an internal medicine physician with a practice address in San Mateo, California, and NPI 1831121425, issued on Jul 6, 2006. Check the license (California A72920, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Amy Sawyer Daniher
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A72920 CA
Self-reported in NPPES; status is on the state search - Practice location
- 34 North San Mateo Drive #1, San Mateo, CA 94401
- Phone
- (650) 696-5851
- Enumerated
- Jul 6, 2006
- Record last updated
- Apr 12, 2017 (not updated in 9 years: call before relying on the address or phone)
- Fax
- (650) 393-5871
- Medicare enrollment
- Enrolled (PECOS I20071010000872); accepts Medicare assignment
- Medical or professional school
- University Of Kansas School Of Med (Kc/Wich/Sal), 1994
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Verify Amy Sawyer Daniher in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A72920Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
29% fewer Medicare Part D claims than the average internal medicine physician in 2024
2,254 Medicare Part D claims for 154 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 35 claims were for opioids.
Most prescribed
- Amlodipine Besylate166 claims
- Atorvastatin Calcium146 claims
- Levothyroxine Sodium128 claims
- Metoprolol Succinate77 claims
- Eliquis66 claims
- Gabapentin64 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.
Amy Sawyer Daniher among 17,696 internal medicine physician records in California
Amy Sawyer Daniher, 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 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1994 · median 2004 among the 11,065 with a school on file
- Record last updated2017 · 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).
44 internal medicine physician records list a practice address in San Mateo
They are 44 of the 3,909 NPPES records with a practice address in San Mateo, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in San Mateo → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Jack Bernstein, MDSan Mateo, CA 944011457301384
- Mary Dobbins, M.D.San Mateo, CA 944011407837693
- Terry Farrow, MDSan Mateo, CA 944011750427753
- Umesh Gheewala, M.D.San Mateo, CA 944011982608568
- Paul Jemelian, MDSan Mateo, CA 944011639190861
- Hoa Le, MDSan Mateo, CA 944011952356917
- Ian Lin, MDSan Mateo, CA 944011245306836
- Timothy Offensend, MDSan Mateo, CA 944011083667539
Common questions
What is Amy Sawyer Daniher, M.D.'s NPI number?
Amy Sawyer Daniher, M.D.'s National Provider Identifier (NPI) is 1831121425, issued on Jul 6, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Amy Sawyer Daniher, M.D. located?
The NPPES record lists a practice address at 34 North San Mateo Drive #1, San Mateo, CA, 94401. Phone: (650) 696-5851. Providers update this record themselves, so call before visiting.
How can I verify Amy Sawyer Daniher, M.D.'s license?
NPPES lists California license number A72920, 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 Amy Sawyer Daniher, M.D. prescribe under Medicare Part D?
In 2024, Amy Sawyer Daniher, M.D. had 2,254 Medicare Part D claims for 154 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.