Gary Hamamoto, M.D.
Surgery Physician · Owings Mills, MD
Gary Hamamoto, M.D. is a surgery physician with a practice address in Owings Mills, Maryland, and NPI 1356348833, issued on Jun 30, 2005. Check the license (Maryland D0030516, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Gary Hamamoto
- Credential
- M.D.
- Primary taxonomy
- Surgery Physician 208600000X
- License number
- D0030516 MD
Self-reported in NPPES; status is on the state search - Practice location
- 23 Crossroads Dr, Owings Mills, MD 21117
- Phone
- (410) 581-0700
- Enumerated
- Jun 30, 2005
- Record last updated
- Aug 21, 2024
- Fax
- (410) 581-0705
- Medicaid ID
- 373981300 MD
- Medicare enrollment
- Enrolled (PECOS I20060131000873); may accept Medicare assignment
- Medical or professional school
- R Franklin University Of Med & Sci/Chicago Medical School, 1979
- Entity
- Type 1 · individual
8 nearest surgery physician records → All 672 in Maryland → Look up another NPI →
Also registered at 23 Crossroads Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Virginia Boyer, CRNACertified Registered Nurse Anesthetist1689646184
- Lindsay Creed, AU.D., CCC-A, FAAAAudiologist1104239029
- Ralph Epstein, M.D.Specialist1568460020
- Jennie Faber, MDObstetrics & Gynecology Physician1629079553
- Novlet Fenwick, CRNACertified Registered Nurse Anesthetist1033181540
- Linda Fuller, M.A., CCC-AAudiologist1043460801
Verify Gary Hamamoto in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D0030516Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
34% fewer Medicare Part D claims than the average surgery physician in 2024
97 Medicare Part D claims for 89 beneficiaries, against an average of 147 among the 20,115 providers of this specialty who prescribed in Part D. 82 claims were for opioids.
Most prescribed
- Oxycodone Hcl77 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): 76.6 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: $9,001.38
16 payments; by number, the most common kind was food and beverage; the largest payer was Intuitive Surgical, Inc. The 17,103 providers of this specialty with any payment received $3,513.80 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
- Sinai Hospital OF Baltimore, IncBaltimore, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gary Hamamoto among 672 surgery physician records in Maryland
Gary Hamamoto, M.D. is one of 672 surgery physician records with a practice address in Maryland. 69% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 90% newer
- In a Medicare fileYes · 69% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated1979 · median 2003 among the 385 with a school on file
- Record last updated2024 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208600000X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Surgery Physician providers in Maryland
There are 672 surgery physician records in Maryland.
All 672 in Maryland → Every provider in Owings Mills → Surgery Physician nationwide →
The 8 surgery physician records with the nearest ZIP codes
- Alan Davis, M.D.Owings Mills, MD 211171306895461
- William Geis, M.D.Owings Mills, MD 211171790744092
- Marc Gertner, M.D.Owings Mills, MD 211171144227612
- Emad Kandil, M.D.Owings Mills, MD 211171356488704
- Eric Kraut, M.D.Owings Mills, MD 211171255439626
- Michael O'Laughlin, MDOwings Mills, MD 211171003344110
- Romeo Peshku, P.A.Owings Mills, MD 211171356645063
- Jennifer Brown, MDRandallstown, MD 211331225532773
Common questions
What is Gary Hamamoto, M.D.'s NPI number?
Gary Hamamoto, M.D.'s National Provider Identifier (NPI) is 1356348833, issued on Jun 30, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Gary Hamamoto, M.D. located?
The NPPES record lists a practice address at 23 Crossroads Dr, Owings Mills, MD, 21117. Phone: (410) 581-0700. Providers update this record themselves, so call before visiting.
How can I verify Gary Hamamoto, M.D.'s license?
NPPES lists Maryland license number D0030516, as entered by the provider. Search the Maryland Board of Physicians at https://www.mbp.state.md.us/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Gary Hamamoto, M.D. prescribe under Medicare Part D?
In 2024, Gary Hamamoto, M.D. had 97 Medicare Part D claims for 89 beneficiaries; the average among surgery physician prescribers was 147. Part D covers Medicare prescriptions only.
What is Gary Hamamoto, M.D.'s MIPS final score?
The 2023 MIPS final score is 76.6 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.