Andrew Diamond Guenthart, M.D.
Surgery of the Hand (Surgery) Physician · Morgan Hill, CA
Andrew Diamond Guenthart, M.D. is a surgery of the hand (surgery) physician with a practice address in Morgan Hill, California, and NPI 1134482805, issued on Jun 19, 2012. Check the license (California A168013, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Andrew Diamond Guenthart
- Credential
- M.D.
- Primary taxonomy
- Surgery of the Hand (Surgery) Physician 2086S0105X
- License numbers
- A168013 CA
51048 KY
Self-reported in NPPES; status is on the state search - Practice location
- 16360 Monterey RD Ste 280, Morgan Hill, CA 95037
- Phone
- (408) 825-1333
- Enumerated
- Jun 19, 2012
- Record last updated
- Jun 9, 2025
- Fax
- (408) 825-1335
- Medicare enrollment
- Enrolled (PECOS I20210628003249); accepts Medicare assignment
- Medical or professional school
- Temple University School Of Medicine, 2012
- Entity
- Type 1 · individual
8 nearest surgery of the hand (surgery) physician records → All 39 in California → Look up another NPI →
Verify Andrew Diamond Guenthart in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A168013Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
70% fewer Medicare Part D claims than the average surgery of the hand (surgery) physician in 2024
57 Medicare Part D claims for 35 beneficiaries, against an average of 188 among the 346 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims. 21 claims were for opioids.
Most prescribed
- Oxycodone-Acetaminophen21 claims
- Ketorolac Tromethamine17 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.
Industry payments in 2024: $2,737.76
7 payments; by number, the most common kind was food and beverage; the largest payer was Intuitive Surgical, Inc. The 296 providers of this specialty with any payment received $4,725.83 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Bass Medical GroupMountain View, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Andrew Diamond Guenthart among 39 surgery of the hand (surgery) physician records in California
Andrew Diamond Guenthart, M.D. is one of 39 surgery of the hand (surgery) physician records with a practice address in California. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2012, is newer than 90% of them.
- NPI issued2012 · 90% of these records are older, 8% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated2012 · median 2000 among the 29 with a school on file
- Record last updated2025 · 69% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2086S0105X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Surgery of the Hand (Surgery) Physician providers in California
There are 39 surgery of the hand (surgery) physician records in California.
All 39 in California → Every provider in Morgan Hill → Surgery of the Hand (Surgery) Physician nationwide →
The 8 surgery of the hand (surgery) physician records with the nearest ZIP codes
- Darrel Keyser, MDHayward, CA 945451346292539
- Aileen Shieu, MDSan Mateo, CA 944031154515385
- Robert Markison, MDSan Francisco, CA 941091952469983
- Katharina Pellegrin, M.D.San Francisco, CA 941091114994233
- Samuel Kao, M.D.San Francisco, CA 941081497747943
- Frederick Abruzzo, M.D.San Francisco, CA 941031801000815
- Ricardo Avena, M.D.Fresno, CA 937201114903648
- Randi Galli, M.D.Fresno, CA 937201932184959
Common questions
What is Andrew Diamond Guenthart, M.D.'s NPI number?
Andrew Diamond Guenthart, M.D.'s National Provider Identifier (NPI) is 1134482805, issued on Jun 19, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Andrew Diamond Guenthart, M.D. located?
The NPPES record lists a practice address at 16360 Monterey RD Ste 280, Morgan Hill, CA, 95037. Phone: (408) 825-1333. Providers update this record themselves, so call before visiting.
How can I verify Andrew Diamond Guenthart, M.D.'s license?
NPPES lists California license number A168013, 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 Andrew Diamond Guenthart, M.D. prescribe under Medicare Part D?
In 2024, Andrew Diamond Guenthart, M.D. had 57 Medicare Part D claims for 35 beneficiaries; the average among surgery of the hand (surgery) physician prescribers was 188. 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.