Aren Vierra, MD
NPI 1528587185 · Diagnostic Radiology Physician · Mountain View, CA
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Aren Vierra, MD is a Diagnostic Radiology Physician provider in Mountain View, CA (NPI 1528587185).
Provider details
- NPI number
- 1528587185
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A182053 (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
8 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
4 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
326 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) |
|---|---|---|
| X-Ray of Chest, 1 View71045 | 113 | $9 |
| X-Ray for Bone Length Assessment77073 | 64 | $15 |
| 3d Radiographic Procedure With Computerized Image Postprocessing76377 | 63 | $42 |
| X-Ray of Entire Middle and Lower Spine, 2-3 Views72082 | 45 | $17 |
| X-Ray of Abdomen, 1 View74018 | 25 | $10 |
| X-Ray of Chest, 2 Views71046 | 16 | $12 |
Typical Medicare-allowed amounts for these services range $9–$42 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Additional practice locations (3)
- 4610 X StSacramento, CA 95817-2200Phone: (916) 816-7164
- 1600 Divisadero St Rm C250San Francisco, CA 94143-3010Phone: (415) 885-7464
- 1001 Potrero Avenue Bld5 1st FlSan Francisco, CA 94110Phone: (628) 206-8020Fax: (628) 206-4004
Registry dates
- Enumerated
- 2017-09-14
- Last updated
- 2025-07-14
- Certified
- 2025-07-14
Frequently asked questions
- What is Aren Vierra's NPI number?
- Aren Vierra's National Provider Identifier (NPI) is 1528587185, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Aren Vierra's specialty?
- Aren Vierra is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Aren Vierra located?
- Aren Vierra's practice location on file with NPPES is 701 E El Camino Real, Mountain View, CA 94040-2833.
- What is Aren Vierra's phone number?
- The practice phone number listed in the NPPES registry for Aren Vierra is (650) 934-7700.
- Does Aren Vierra accept Medicare?
- Aren Vierra is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Aren Vierra's NPI active?
- Yes — Aren Vierra's NPI (1528587185) is active in the NPPES registry as of the last update on 2025-07-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.