Ari Umutyan, M.D.
Hematology/Oncology (CMS) · San Francisco, CA
At a glance
1825 4Th St Fl 6, San Francisco, CA 94143-2350
NPPES record updated Oct 15, 2026. 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
1825 4Th St Fl 6San Francisco, CA 94143-2350
Additional reported practice locations
575 Lennon Ln Ste 153Walnut Creek, CA 945982443
Phone: 9254338786 10 Woodland Rd
Saint Helena, CA 945749554
Phone: 7079675721 18990 Coyote Valley Rd Ste 5
Hidden Valley Lake, CA 954678339
Phone: 7079675721
Education & affiliations
- Medical / professional school
- University Of Southern California Keck School Of Medicine
- Graduation year
- 2000
- CMS specialties
- Hematology/Oncology
CMS reports telehealth services for this clinician. Confirm current services and availability with the practice.
Practice groups
Reported hospital affiliations
- Adventist Health Clearlake Clearlake, CA
- Adventist Health St Helena Saint Helena, CA
- Adventist Health Ukiah Valley Ukiah, CA
- Providence Queen Of The Valley Medical Center Napa, CA
- Sonoma Valley Hospital Sonoma, 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.
No displayed procedure-category record in this release. This does not mean the clinician performs no procedures.
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 | $1,297.95 |
| Long-term medical supply or device loan | $598.20 |
Reporting companies
| Company | Amount |
|---|---|
| NOVARTIS PHARMACEUTICALS CORPORATION | $730.28 |
| ASTRAZENECA PHARMACEUTICALS LP | $228.10 |
| JANSSEN BIOTECH, INC. | $144.59 |
| CELGENE CORPORATION | $113.57 |
| DAIICHI SANKYO INC. | $74.91 |
| BAYER HEALTHCARE PHARMACEUTICALS INC. | $67.34 |
| ARRAY BIOPHARMA INC | $60.04 |
| PFIZER INC. | $56.30 |
| Other reporting companies | $421.02 |
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
- Hematology/Oncology (CMS)
- Taxonomy code
- 207RX0202X
- Enumeration date
- Nov 23, 2005
- Record updated
- Oct 15, 2026
More registry details
- Provider type
- Individual · Type 1
- Reported credentials
- M.D.
Reported taxonomies and licenses
207RH0003X
License reported: A76240 CA
207RX0202X · Primary
License reported: A76240 CA
License numbers and credentials are reported to NPPES; HCPList does not independently verify them.
Practice location
1825 4Th St Fl 6San Francisco, CA 94143-2350
- Phone
- (415) 885-3800
Mailing address
10 WOODLAND RDSAINT HELENA, CA 945749554
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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