William T Marshall, DO
General Practice (CMS) · Valhalla, NY
At a glance
100 Woods Rd # A, Valhalla, NY 10595
Published activity: Colonoscopy · Hernia repair (minimally invasive) · Melanoma (skin cancer) excision. View counts and coverage
NPPES record updated Jan 24, 2019. Public records can lag behind changes at a practice.
Before you call: a quick checklist
- Are you accepting new patients?
- Do you accept my specific insurance plan?
- Do you provide the service I need at this address?
- Do I need a referral, and what is the earliest appointment?
Insurance participation and appointment availability are not established by these public records.
Medicare & insurance
Insurance participation is not established by these public records. Ask the practice and your insurer about your specific plan and this location.
How to check your coverage
Use your plan’s provider directory or the member-services number on your insurance card. Confirm the clinician, practice address, service, and whether a referral is required. A missing opt-out record does not establish Medicare acceptance.
Check the official Medicare directory ↗Practice location
100 Woods Rd # AValhalla, NY 10595
Additional reported practice locations
1000 Asylum AveSuite 4320
Hartford, CT 061051770
Phone: 8607145237
Fax: 8607148097 1000 Asylum Ave
Suite 4320
Hartford, CT 061051770
Phone: 8607145237
Fax: 8607148097
Education & affiliations
- Medical / professional school
- New York College Of Osteo Medicine Of New York Institute Of Technology
- Graduation year
- 1999
- CMS specialties
- General Practice
Practice groups
Reported hospital affiliations
- Bristol Hospital Bristol, CT
- North Country Hospital And Health Center Newport, VT
Graduation year does not establish years in practice. A reported affiliation does not establish employment, current admitting privileges, or insurance participation.
Source: CMS National Downloadable File · Published Oct 15, 2026.
Source: CMS Facility Affiliation Data · Published Oct 15, 2026.
Procedures in the public data
Reported activity can help you ask more informed questions about a practice’s services.
| Procedure category | Published Medicare activity |
|---|---|
| Colonoscopy | 1-10 |
| Hernia repair (minimally invasive) | 1-10 |
| Melanoma (skin cancer) excision | 19 |
| Pacemaker insertion or repair | 1-10 |
| Removal of skin lesions | 1-10 |
| Removal of tissue | 20 |
| Removal or shaving of skin growth | 1-10 |
| Skin biopsy | 1-10 |
| Spinal fusion | 1-10 |
| Upper gastrointestinal (GI) endoscopy for acid reflux | 1-10 |
CMS uses a one-year claims window with a reporting lag. Counts cover the Medicare activity included by CMS, not all patients. “1–10” is a published range. Volume is not a quality or outcomes score. Coverage and methodology
Source: CMS Utilization Data · Published Oct 15, 2026.
Find providers with a similar service mix
Compare 2024 published Medicare activity in the same reported specialty, here or in another city.
Industry-reported general payments
Includes reported transfers of value, such as meals, travel, or consulting. Payments do not establish improper conduct or quality of care. Research funding and ownership values are excluded from this total.
See payment purposes and reporting companies
Reported purposes
| Purpose | Amount |
|---|---|
| Food and beverage | $485.80 |
Reporting companies
| Company | Amount |
|---|---|
| ORGANOGENESIS INC. | $211.59 |
| INTUITIVE SURGICAL, INC. | $123.41 |
| DILON TECHNOLOGIES, INC. | $43.89 |
| PARATEK PHARMACEUTICALS, INC. | $35.58 |
| INTEGRA LIFESCIENCES CORPORATION | $30.76 |
| STRYKER CORPORATION | $23.91 |
| SOLVENTUM CORPORATION | $16.66 |
Source: CMS 2025 payments grouped by covered recipient and nature of payments · Published Jun 30, 2026.
Professional details: NPI, taxonomy & registry record
Registry details
- Primary taxonomy
- General Practice (CMS)
- Taxonomy code
- 2086S0102X
- Enumeration date
- Aug 9, 2006
- Record updated
- Jan 24, 2019
More registry details
- Provider type
- Individual · Type 1
- Reported credentials
- DO
Reported taxonomies and licenses
208600000X
License reported: 044420 CT
174400000X
License reported: 044420 CT
2086S0102X · Primary
License reported: 296662 NY
License numbers and credentials are reported to NPPES; HCPList does not independently verify them.
Practice location
100 Woods Rd # AValhalla, NY 10595
- Phone
- (914) 493-7000
Mailing address
19 BRADHURST AVE STE 3100NHAWTHORNE, NY 105322140
Information may be outdated or incomplete. Confirm details directly with the practice. HCPList is an independent directory and is not affiliated with CMS.
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