Ari Umutyan, M.D.
NPI 1275516171 · Medical Oncology Physician · Saint Helena, CA
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ari Umutyan, M.D. is a Medical Oncology Physician provider in Saint Helena, CA (NPI 1275516171).
Provider details
- NPI number
- 1275516171
- Entity type
- Individual
- Primary specialty
- Medical Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A76240 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
1,548 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 514 | $154 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 379 | $104 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 172 | $71 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 169 | $93 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 111 | $126 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 22 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Anastrozole | 85 | 27 |
| Letrozole | 75 | 19 |
| Apixabanbrand: Eliquis | 53 | — |
| Enzalutamidebrand: Xtandi | 48 | — |
| Hydroxyurea | 37 | 12 |
| Ruxolitinib Phosphatebrand: Jakafi | 35 | — |
| Tamoxifen Citrate | 35 | — |
| Rivaroxaban |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,698 across 67 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (2)
- 18990 Coyote Valley Rd Ste 5Hidden Valley Lake, CA 95467-8339Phone: (707) 967-5721
- 575 Lennon Ln Ste 153Walnut Creek, CA 94598-2443Phone: (925) 433-8786
Registry dates
- Enumerated
- 2005-11-23
- Last updated
- 2025-02-11
- Certified
- 2025-02-11
Frequently asked questions
- What is Ari Umutyan's NPI number?
- Ari Umutyan's National Provider Identifier (NPI) is 1275516171, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ari Umutyan's specialty?
- Ari Umutyan is listed in the NPPES registry with a primary specialty of Medical Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Ari Umutyan located?
- Ari Umutyan's practice location on file with NPPES is 10 Woodland Rd, Saint Helena, CA 94574-9554.
- What is Ari Umutyan's phone number?
- The practice phone number listed in the NPPES registry for Ari Umutyan is (707) 967-5721.
- Does Ari Umutyan accept Medicare?
- Ari Umutyan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ari Umutyan's NPI active?
- Yes — Ari Umutyan's NPI (1275516171) is active in the NPPES registry as of the last update on 2025-02-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.