Dr. Gary T. Marshall, MD
- Medicare services, 2023
- 111
- Hospital affiliations
- 2
- Medical groups
- 2
- State license
- 1
- Year NPI issued
- 2006
- Practice address
- 300 Community Drive, Manhasset, NY 11030
- Practice phone
- Call (516) 562-0100
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Marshall'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 T. Marshall is a trauma surgery physician in Manhasset, New York
Dr. Marshall practices at North Shore University Hospital in Manhasset, New York, part of Northwell Health.
Dr. Marshall's NPI, 1023047487, was assigned on June 30, 2006. Dr. Marshall holds New York license 267752.
- NPI
- 1023047487NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1456356286
- NPI enumeration date
- June 30, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (516) 562-0100
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 51
- Medical school graduation
- 2001
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gary T. Marshall practices at North Shore University Hospital in Manhasset, New York
Dr. Marshall's primary practice is North Shore University Hospital, at 300 Community Drive, Manhasset, NY 11030 in Nassau County. The practice phone is (516) 562-0100.
- North Shore University Hospital300 Community Drive, Manhasset, NY 11030 · Nassau CountyPhone(516) 562-0100
Source: Dmand AI Affiliation Data
Dr. Gary T. Marshall is affiliated with 3 sites of care and 2 medical groups
Dr. Marshall's primary practice is North Shore University Hospital in Manhasset, New York, part of Northwell Health. Dr. Marshall is also affiliated with Medical City Plano Hospital. The medical group on file is Surgery Associates of North Texas. Dmand AI also links Dr. Marshall 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 T. Marshall's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Marshall practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| North Shore University Hospital | 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 T. Marshall is one of 62 trauma surgery physicians in New York
Trauma surgery is Dr. Marshall's primary specialty in the NPI Registry, under taxonomy code 2086S0127X. Dr. Marshall is licensed in New York.
Specialties and state licenses
- Trauma surgery, New YorkPrimary
Trauma surgery physicians near Dr. Marshall
Counts of trauma surgery physicians 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 T. Marshall billed Medicare for 111 services in 2023
CMS data shows 111 Medicare services from Dr. Marshall across 4 procedure codes in 2023. Medicare paid $10,757 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Marshall's Medicare services by type, 2022 to 2023
- 2022
- 2023
- Office and hospital visits
- 2022: 1022023: 1119%
Dr. Marshall compared with the New York median for trauma surgery physicians, 2023
- Dr. Marshall
- New York median
- Medicare services
- 111vs 17436% below
Medians across 58 trauma surgery physicians in New York with Dmand AI profiles that report each measure.
Dr. Marshall's most billed Medicare procedure codes, 2023
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Marshall?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Marshall and other trauma surgery physicians in New York.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gary T. Marshall's patients have a median age of 49
Across all payers, Dmand AI patient panel data puts Dr. Marshall's median patient age at 49, with 13% women.
Dr. Marshall's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 49
Patient panel by sex, all payers
- Women13%
- Men83%
Source: Dmand AI Patient Panel Data
How Dr. Gary T. Marshall takes part in Medicare
Dr. Marshall accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Sources for Dr. Gary T. Marshall'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 Data |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| 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 T. Marshall
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 T. Marshall's NPI number?
Dr. Gary T. Marshall's NPI number is 1023047487. It was assigned on June 30, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Gary T. Marshall?
Dr. Gary T. Marshall is a trauma surgery physician in Manhasset, New York. The primary specialty in the NPI Registry is Trauma Surgery Physician (taxonomy code 2086S0127X).
Where does Dr. Gary T. Marshall practice?
Dr. Marshall practices at 300 Community Drive, Manhasset, NY 11030. Dr. Marshall's primary practice is North Shore University Hospital in Manhasset, New York, part of Northwell Health. Dmand AI also links Dr. Marshall to 1 group practice or clinic and 1 medical group.
What is Dr. Gary T. Marshall's office phone number?
The practice phone on file for Dr. Marshall is (516) 562-0100.
What is Dr. Gary T. Marshall's medical license number?
Dr. Marshall holds New York license 267752.
Which hospitals is Dr. Gary T. Marshall affiliated with?
Dr. Marshall practices at North Shore University Hospital in Manhasset, New York. Dr. Marshall is also affiliated with Medical City Plano Hospital.
What medical group is Dr. Gary T. Marshall part of?
Dr. Marshall is linked to Surgery Associates of North Texas. Dmand AI links Dr. Marshall to 1 more medical group.
Does Dr. Gary T. Marshall accept Medicare?
Yes. CMS data shows Dr. Marshall billed Medicare for 111 services in 2023, and Dr. Marshall accepts Medicare assignment.
What services does Dr. Gary T. Marshall bill to Medicare?
In 2023, Dr. Marshall's most billed Medicare services were hospital inpatient care (99232), hospital inpatient care (99233) and critical care (99291).
How long has Dr. Gary T. Marshall been practicing?
Dr. Marshall graduated from medical school in 2001, 25 years ago.
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