Arun Villivalam, M.D,
NPI 1639355944 · Family Medicine Physician · Los Gatos, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Arun Villivalam, M.D, is a Family Medicine Physician provider in Los Gatos, CA (NPI 1639355944).
Provider details
- NPI number
- 1639355944
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D,
- Sex
- Male
- Sole proprietor
- Yes
- License
- A73520 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
18 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
2,299 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 752 | $19 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 592 | $154 |
| Advance Care Planning, First 30 Minutes99497 | 244 | $95 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 240 | $157 |
| Remote Monitoring of Physiologic Parameters, Initial Supply of Devices With Daily Recordings Or Programmed Alerts Transmission, Each 30 Days99454 | 137 | $66 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 54 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Rosuvastatin Calcium | 351 | 95 |
| Atorvastatin Calcium | 319 | 99 |
| Levothyroxine Sodium | 206 | 54 |
| Metformin Hclbrand: Metformin Hcl Er | 152 | 45 |
| Amlodipine Besylate | 100 | 32 |
| Losartan Potassium | 80 | 26 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-01-16
- Last updated
- 2016-04-29
Frequently asked questions
- What is Arun Villivalam's NPI number?
- Arun Villivalam's National Provider Identifier (NPI) is 1639355944, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Arun Villivalam's specialty?
- Arun Villivalam is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Arun Villivalam located?
- Arun Villivalam's practice location on file with NPPES is 15195 National Ave, Los Gatos, CA 95032-2631.
- What is Arun Villivalam's phone number?
- The practice phone number listed in the NPPES registry for Arun Villivalam is (408) 502-6040.
- Does Arun Villivalam accept Medicare?
- Arun Villivalam is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Arun Villivalam's NPI active?
- Yes — Arun Villivalam's NPI (1639355944) is active in the NPPES registry as of the last update on 2016-04-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.