Dr. James Martin Willis, MD
- Medicare services, 2022
- 11
- Part D claims, 2024
- 31
- Hospital affiliations
- 2
- Industry payments
- $16
- Medical groups
- 4
- Practice address
- One Healthy Way, Oceanside, NY 11572
- Practice phone
- Call (516) 632-3000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Willis' 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. James Martin Willis is an emergency medicine physician in Oceanside, New York
Dr. Willis practices at Mount Sinai South Nassau in Oceanside, New York, part of Mount Sinai Health System.
Dr. Willis' NPI, 1063647022, was assigned on May 20, 2009. Dr. Willis holds New York license 263862.
- NPI
- 1063647022NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9032352547
- NPI enumeration date
- May 20, 2009
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (516) 632-3000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 46
- Medical school graduation
- 2006
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. James Martin Willis practices at 2 locations in Oceanside, New York
Dr. Willis' primary practice is Mount Sinai South Nassau, at One Healthy Way, Oceanside, NY 11572 in Nassau County. The practice phone is (516) 632-3000. Dr. Willis also practices at South Nassau Communities Hospital, 1 Healthy Way, Oceanside, NY 11572.
- Mount Sinai South NassauPrimaryOne Healthy Way, Oceanside, NY 11572 · Nassau CountyPhone(516) 632-3000
- South Nassau Communities Hospital1 Healthy Way, Oceanside, NY 11572 · Nassau CountyPhone(516) 632-3000
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; and Dmand AI Practice Data
Dr. James Martin Willis is affiliated with 2 sites of care and 4 medical groups
Dr. Willis' primary practice is Mount Sinai South Nassau in Oceanside, New York, part of Mount Sinai Health System. Dr. Willis is also affiliated with NYC Health + Hospitals/Kings County. The medical group on file is Emergency Medicine Physicians (EMP). Dmand AI also links Dr. Willis to 3 more medical groups, 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. James Martin Willis' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Willis practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Mount Sinai South Nassau | Available with a free account |
| +1 more site and 3 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Mount Sinai Health System and 6.2K+ hospitals, with verified contacts in the same login.
Dr. James Martin Willis is one of 3,709 emergency medicine physicians in New York
Emergency medicine is Dr. Willis' primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Willis is licensed in New York.
Specialties and state licenses
- Emergency medicine, New YorkPrimary
Emergency medicine physicians near Dr. Willis
Counts of emergency medicine 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. James Martin Willis billed Medicare for 11 services in 2022
CMS data shows 11 Medicare services from Dr. Willis across 1 procedure code in 2022. Medicare paid $1,394 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Willis' Medicare services by type, 2021 to 2022
- 2021
- 2022
- Office and hospital visits
- 2021: 142022: 1121%
Dr. Willis compared with the New York median for emergency medicine physicians, 2022
- Dr. Willis
- New York median
- Medicare services
- 11vs 21995% below
Medians across 3,510 emergency medicine physicians in New York with Dmand AI profiles that report each measure.
Dr. Willis' most billed Medicare procedure codes, 2022
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. Willis and other emergency medicine physicians in New York.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. James Martin Willis' patients have a median age of 56
Across all payers, Dmand AI patient panel data puts Dr. Willis' median patient age at 56, with 57% women.
Dr. Willis' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 56
Patient panel by sex, all payers
- Women57%
- Men41%
Source: Dmand AI Patient Panel Data
Dr. James Martin Willis wrote 31 Medicare Part D claims in 2024
In 2024, Dr. Willis wrote 31 Medicare Part D claims for 16 patients. 90% of them were for generic drugs.
Dr. Willis' Part D claims by kind of drug, 2024
- Generic28 claims90%
- Brand-name and other3 claims10%
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. James Martin Willis takes part in Medicare
Dr. Willis 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)
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. James Martin Willis received $16 in industry payments in 2022
CMS Open Payments shows 1 general payment to Dr. Willis from 1 drug or device company in 2022. Food and beverage make up the largest share, 100% of the total. Paratek Pharmaceuticals, Inc. paid the most, $16.
Companies that paid Dr. Willis the most, 2022 to 2022
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. James Martin Willis'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Affiliation DataDmand AI Practice 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 |
| Part D prescribing | Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (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. James Martin Willis
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. James Martin Willis' NPI number?
Dr. James Martin Willis' NPI number is 1063647022. It was assigned on May 20, 2009, and it is active in the NPI Registry.
What kind of doctor is Dr. James Martin Willis?
Dr. James Martin Willis is an emergency medicine physician in Oceanside, New York. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. James Martin Willis practice?
Dr. Willis practices at One Healthy Way, Oceanside, NY 11572. Dr. Willis also practices at 1 Healthy Way, Oceanside, NY 11572. Dr. Willis' primary practice is Mount Sinai South Nassau in Oceanside, New York, part of Mount Sinai Health System. Dmand AI also links Dr. Willis to 3 medical groups.
What is Dr. James Martin Willis' office phone number?
The practice phone on file for Dr. Willis is (516) 632-3000.
What is Dr. James Martin Willis' medical license number?
Dr. Willis holds New York license 263862.
Which hospitals is Dr. James Martin Willis affiliated with?
Dr. Willis practices at Mount Sinai South Nassau in Oceanside, New York. Dr. Willis is also affiliated with NYC Health + Hospitals/Kings County.
What medical group is Dr. James Martin Willis part of?
Dr. Willis is linked to Emergency Medicine Physicians (EMP). Dmand AI links Dr. Willis to 3 more medical groups.
Does Dr. James Martin Willis accept Medicare?
Yes. CMS data shows Dr. Willis billed Medicare for 11 services in 2022, and Dr. Willis accepts Medicare assignment.
What services does Dr. James Martin Willis bill to Medicare?
In 2022, Dr. Willis' most billed Medicare services were emergency department visit (99284).
Has Dr. James Martin Willis received payments from drug or device companies?
CMS Open Payments shows $16 in general payments to Dr. Willis from 1 company from 2022 to 2022. The largest total came from Paratek Pharmaceuticals, Inc.
How long has Dr. James Martin Willis been practicing?
Dr. Willis graduated from medical school in 2006, 20 years ago.
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