Dr. Gary Hamamoto, MD
- Medicare services, 2024
- 760
- Medicare patients, 2024
- 400
- Part D claims, 2024
- 97
- MIPS score, 2024
- 80
- Hospital affiliations
- 1
- Practice address
- 23 Crossroads Drive, Suite 100, Owings Mills, MD 21117
- Practice phone
- Call (410) 356-0300
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
SurgiCenter of Baltimore
Surgery Center - Medicare-Certified · Owings Mills, Maryland
Find Dr. Hamamoto's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Gary Hamamoto is a general surgeon in Owings Mills, Maryland
Dr. Hamamoto practices at SurgiCenter of Baltimore in Owings Mills, Maryland.
Dr. Hamamoto's NPI, 1356348833, was assigned on June 30, 2005. Dr. Hamamoto graduated from R Franklin University of Med & Sci/Chicago Medical School in 1979. Dr. Hamamoto holds Maryland license D0030516.
- NPI
- 1356348833NPI Registry (opens in a new tab)
- NPI enumeration date
- June 30, 2005
- NPI status
- Active
- Practice phone
- (410) 356-0300
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 73
- Medical school graduation
- 1979
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Gary Hamamoto practices at SurgiCenter of Baltimore in Owings Mills, Maryland
Dr. Hamamoto's primary practice is SurgiCenter of Baltimore, at 23 Crossroads Drive, Suite 100, Owings Mills, MD 21117. The practice phone is (410) 356-0300.
- SurgiCenter of Baltimore23 Crossroads Drive, Suite 100, Owings Mills, MD 21117Phone(410) 356-0300
Source: Dmand AI Affiliation Data
Dr. Gary Hamamoto is affiliated with 3 sites of care and 2 medical groups
Dr. Hamamoto's primary practice is SurgiCenter of Baltimore in Owings Mills, Maryland. Dr. Hamamoto is also affiliated with Northwest Hospital. The medical group on file is Sinai Rehab Pain Medicine Associates. Dmand AI also links Dr. Hamamoto to 1 more group practice or clinic and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Gary Hamamoto's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Hamamoto practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| SurgiCenter of Baltimore | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gary Hamamoto is one of 532 general surgeons in Maryland
Surgery is Dr. Hamamoto's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Hamamoto is licensed in Maryland.
Specialties and state licenses
- Surgery, MarylandPrimary
General surgeons near Dr. Hamamoto
Counts of general surgeons with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Gary Hamamoto billed Medicare for 760 services in 2024
CMS data shows 760 Medicare services from Dr. Hamamoto across 13 procedure codes in 2024, for 400 Medicare patients. Medicare paid $100,242 for them.
Dr. Hamamoto's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 5362024: 45615%
- Surgery
- 2023: 1922024: 16116%
- Imaging
- 2023: 1032024: 11714%
- Lab and pathology
- 2023: 362024: 2628%
Where Dr. Hamamoto's Medicare services took place, 2024
- In an office59979%
- In a facility16121%
Dr. Hamamoto compared with the Maryland median for general surgeons, 2024
- Dr. Hamamoto
- Maryland median
- Medicare services
- 760vs 2303.3 times
- Medicare patients
- 400vs 1622.5 times
- Part D claims
- 77vs 263.0 times
Medians across 485 general surgeons in Maryland with Dmand AI profiles that report each measure.
Dr. Hamamoto's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Hamamoto and other general surgeons in Maryland.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gary Hamamoto treated 400 Medicare patients in 2024, average age 74
CMS counts 400 Medicare patients who saw Dr. Hamamoto in 2024. The largest group is 65 to 74, with 190 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 13% are also on Medicaid. Their average risk score is 0.98, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Hamamoto's median patient age at 65, with 48% women.
Dr. Hamamoto's Medicare patients by age, 2024
Dr. Hamamoto's Medicare patients by sex, 2024
- Women22055%
- Men18045%
Chronic conditions among Dr. Hamamoto's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis46%
- Diabetes38%
- Ischemic heart disease27%
- Cancer23%
- Chronic kidney disease19%
- Mood disorders17%
Share of Medicare patients with each condition. A patient can have several.
Dr. Hamamoto's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 65
Patient panel by sex, all payers
- Women48%
- Men51%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Gary Hamamoto wrote 97 Medicare Part D claims in 2024
In 2024, Dr. Hamamoto wrote 97 Medicare Part D claims for 89 patients. 99% of them were for generic drugs. CMS names the drug for 77 of them, across 1 drug with 11 or more claims each, at $103 in total drug cost. In 2023, CMS named 65 claims across 1 drug.
Dr. Hamamoto's Part D claims by kind of drug, 2024
- Generic96 claims99%
- Brand-name and other1 claims1%
Dr. Hamamoto's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Hamamoto's Part D claims, 2024
- Opioids85%82 of 97 claims
- Antibiotics12%12 of 97 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 652024: 7718%
Drugs named by CMS: 1 in 2024, 1 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Gary Hamamoto scored 80 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 80 out of 100 for Dr. Hamamoto for performance year 2024, reported individually.
Dr. Hamamoto's MIPS scores, performance year 2024
- 80of 100Final score
- 61.8of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 73of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Source: Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Gary Hamamoto received $21,379 in industry payments from 2016 to 2025
CMS Open Payments shows 100 general payments to Dr. Hamamoto from 16 drug and device companies from 2016 to 2025. Education make up the largest share, 56% of the total. Intuitive Surgical, Inc. paid the most, $16,284.
General payments to Dr. Hamamoto by program year, 2016 to 2025
General payments to Dr. Hamamoto by kind, 2016 to 2025
- Education$12,00056%
- Food and beverage$5,17224%
- Travel and lodging$4,19520%
- Gifts$130%
Companies that paid Dr. Hamamoto the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Gary Hamamoto graduated from R Franklin University of Med & Sci/Chicago Medical School
Dr. Hamamoto graduated from R Franklin University of Med & Sci/Chicago Medical School in 1979.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Gary Hamamoto's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Gary Hamamoto
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Gary Hamamoto's NPI number?
Dr. Gary Hamamoto's NPI number is 1356348833. It was assigned on June 30, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Gary Hamamoto?
Dr. Gary Hamamoto is a general surgeon in Owings Mills, Maryland. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. Gary Hamamoto practice?
Dr. Hamamoto practices at 23 Crossroads Drive, Suite 100, Owings Mills, MD 21117. Dr. Hamamoto's primary practice is SurgiCenter of Baltimore in Owings Mills, Maryland. Dmand AI also links Dr. Hamamoto to 1 group practice or clinic and 1 medical group.
What is Dr. Gary Hamamoto's office phone number?
The practice phone on file for Dr. Hamamoto is (410) 356-0300.
What is Dr. Gary Hamamoto's medical license number?
Dr. Hamamoto holds Maryland license D0030516.
Which hospitals is Dr. Gary Hamamoto affiliated with?
Dr. Hamamoto is affiliated with Northwest Hospital.
What medical group is Dr. Gary Hamamoto part of?
Dr. Hamamoto is linked to Sinai Rehab Pain Medicine Associates. Dmand AI links Dr. Hamamoto to 1 more medical group.
Does Dr. Gary Hamamoto accept Medicare?
Yes. CMS data shows Dr. Hamamoto billed Medicare for 760 services in 2024.
What is Dr. Gary Hamamoto's MIPS score?
Dr. Hamamoto's MIPS final score for performance year 2024 is 80 out of 100, reported individually.
How many Medicare patients does Dr. Gary Hamamoto see?
CMS counts 400 Medicare patients who saw Dr. Hamamoto in 2024, with an average age of 74.
Show 5 more questionsShow fewer questions
What services does Dr. Gary Hamamoto bill to Medicare?
In 2024, Dr. Hamamoto's most billed Medicare services were office visit, established patient (99214), office visit, new patient (99205) and ultrasound (76705).
Where did Dr. Gary Hamamoto go to medical school?
Dr. Hamamoto graduated from R Franklin University of Med & Sci/Chicago Medical School in 1979.
What drugs does Dr. Gary Hamamoto prescribe most?
In 2024 Medicare Part D data, Dr. Hamamoto's most prescribed drugs by claims were Oxycodone HCl.
Has Dr. Gary Hamamoto received payments from drug or device companies?
CMS Open Payments shows $21,379 in general payments to Dr. Hamamoto from 16 companies from 2016 to 2025. The largest total came from Intuitive Surgical, Inc.
How long has Dr. Gary Hamamoto been practicing?
Dr. Hamamoto graduated from medical school in 1979, 47 years ago.
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