Gregory Michael Senofsky, MD
General Surgery · Surgical Oncology (CMS) · Santa Clarita, CA
At a glance
27235 Tourney Rd Ste 2400, Santa Clarita, CA 91355-5905
Published activity: Mastectomy · Melanoma (skin cancer) excision. View counts and coverage
NPPES record updated Dec 27, 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
27235 Tourney Rd Ste 2400Santa Clarita, CA 91355-5905
Additional reported practice locations
15503 Ventura Blvd Ste 150Encino, CA 914363115
Phone: 8189958044
Fax: 8189958007 19950 Rinaldi St Ste 310
Porter Ranch, CA 913264141
Phone: 8182712500
Fax: 8182712501
Education & affiliations
- Medical / professional school
- Baylor College Of Medicine
- Graduation year
- 1979
- CMS specialties
- General Surgery · Surgical Oncology
Practice groups
Reported hospital affiliations
- Henry Mayo Newhall Hospital Valencia, CA
- Ridgecrest Regional Hospital Ridgecrest, CA
- Ronald Reagan Ucla Medical Center Los Angeles, CA
- Ucla West Valley Medical Center West Hills, CA
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 |
|---|---|
| Mastectomy | 40 |
| Melanoma (skin cancer) excision | 37 |
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 | $18.21 |
Reporting companies
| Company | Amount |
|---|---|
| MERCK SHARP & DOHME LLC | $18.21 |
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 Surgery · Surgical Oncology (CMS)
- Taxonomy code
- 2086X0206X
- Enumeration date
- Oct 10, 2006
- Record updated
- Dec 27, 2019
More registry details
- Provider type
- Individual · Type 1
- Reported credentials
- MD
Reported taxonomies and licenses
208600000X
License reported: A42817 CA
2086X0206X · Primary
License reported: A42817 CA
License numbers and credentials are reported to NPPES; HCPList does not independently verify them.
Practice location
27235 Tourney Rd Ste 2400Santa Clarita, CA 91355-5905
- Phone
- (661) 255-9287
- Fax
- (661) 255-8478
Mailing address
5767 W CENTURY BLVD STE 400LOS ANGELES, CA 900455631
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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