Garrett S. Matsunaga, M.D.
Urology Physician · Torrance, CA
Garrett S. Matsunaga, M.D. is a urology physician with a practice address in Torrance, California, and NPI 1740201623, issued on Jul 23, 2006. Check the license (California A77838, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Garrett S. Matsunaga
- Credential
- M.D.
- Primary taxonomy
- Urology Physician 208800000X
- License number
- A77838 CA
Self-reported in NPPES; status is on the state search - Practice location
- 20911 Earl St Ste 140, Torrance, CA 90503
- Phone
- (310) 542-0199
- Enumerated
- Jul 23, 2006
- Record last updated
- Oct 25, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (310) 542-4652
- Medicare enrollment
- Enrolled (PECOS I20050618000111); accepts Medicare assignment
- Medical or professional school
- University Of Texas Medical School At San Antonio, 2000
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest urology physician records → All 1,524 in California → Look up another NPI →
Also registered at 20911 Earl St Ste 140
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Kimberly Bautista, NURSE PRACTITIONERFamily Nurse Practitioner1730339086
- Taylor Diaz, PA-CPhysician Assistant1083264923
- Bethany Francis, NPAcute Care Nurse Practitioner1437757895
- Marcus Kauffman, MDUrology Physician1831201326
- Hyung-Gyou Kim, PA-CPhysician Assistant1336865807
- Katherine Sladewski, PAPhysician Assistant1104481324
Verify Garrett S. Matsunaga in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A77838Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
30% more Medicare Part D claims than the average urology physician in 2024
1,742 Medicare Part D claims for 539 beneficiaries, against an average of 1,340 among the 10,782 providers of this specialty who prescribed in Part D. 30 claims were for opioids.
Most prescribed
- Tamsulosin Hcl436 claims
- Finasteride307 claims
- Alfuzosin Hcl Er132 claims
- Dutasteride121 claims
- Gemtesa81 claims
- Ciprofloxacin Hcl79 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 84 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $1,555.15
59 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 9,340 providers of this specialty with any payment received $3,800.04 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
- Genesis Healthcare Partners PCTorrance, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Garrett S. Matsunaga among 1,524 urology physician records in California
Garrett S. Matsunaga, M.D. is one of 1,524 urology physician records with a practice address in California. 82% 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 8% of them.
- NPI issued2006 · 8% of these records are older, 51% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated2000 · median 2003 among the 1,049 with a school on file
- Record last updated2021 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208800000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Urology Physician providers in California
There are 1,524 urology physician records in California.
All 1,524 in California → Every provider in Torrance → Urology Physician nationwide →
The 8 urology physician records with the nearest ZIP codes
- Marcus Kauffman, MDTorrance, CA 905031831201326
- Timothy Lesser, MDTorrance, CA 905031053436550
- Manish Mehta, MDTorrance, CA 905031720146871
- Shelby Morrisroe, M.D.Torrance, CA 905031164666228
- Richard Reznichek, M.D.Torrance, CA 905021932295441
- Faisal Ahmed, M.DTorrance, CA 905051093950917
- Kambiz Dardashti, MDTorrance, CA 905051073567434
- Lawrence Flechner, M.D., PH.D.Torrance, CA 905051689815458
Common questions
What is Garrett S. Matsunaga, M.D.'s NPI number?
Garrett S. Matsunaga, M.D.'s National Provider Identifier (NPI) is 1740201623, issued on Jul 23, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Garrett S. Matsunaga, M.D. located?
The NPPES record lists a practice address at 20911 Earl St Ste 140, Torrance, CA, 90503. Phone: (310) 542-0199. Providers update this record themselves, so call before visiting.
How can I verify Garrett S. Matsunaga, M.D.'s license?
NPPES lists California license number A77838, 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 Garrett S. Matsunaga, M.D. prescribe under Medicare Part D?
In 2024, Garrett S. Matsunaga, M.D. had 1,742 Medicare Part D claims for 539 beneficiaries; the average among urology physician prescribers was 1,340. Part D covers Medicare prescriptions only.
What is Garrett S. Matsunaga, M.D.'s MIPS final score?
The 2023 MIPS final score is 84 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.