Vivian Diep
NPI 1487167912 · Physician Assistant · San Jose, CA
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Vivian Diep is a Physician Assistant provider in San Jose, CA (NPI 1487167912).
Provider details
- NPI number
- 1487167912
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Sex
- Female
- Sole proprietor
- Yes
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
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
83% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
141 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 62 | $184 |
| Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes99231 | 48 | $47 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 19 | $132 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 12 | $223 |
Typical Medicare-allowed amounts for these services range $47–$223 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote 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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 7 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Sulfamethoxazole/Trimethoprimbrand: Sulfamethoxazole-Trimethoprim | 37 | — |
| Rosuvastatin Calcium | 30 | — |
| Pantoprazole Sodium | 29 | 13 |
| Valganciclovir Hcl | 26 | — |
| Oxycodone Hcl | 12 | 12 |
| Ondansetronbrand: Ondansetron Odt | 12 | — |
| Methylprednisolone | 11 |
Practice location
Mailing address
Additional practice locations (1)
- 751 S Bascom AveSan Jose, CA 95128-2604Phone: (888) 334-1000
Registry dates
- Enumerated
- 2017-11-06
- Last updated
- 2020-01-15
- Certified
- 2020-01-15
Frequently asked questions
- What is Vivian Diep's NPI number?
- Vivian Diep's National Provider Identifier (NPI) is 1487167912, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Vivian Diep's specialty?
- Vivian Diep is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Vivian Diep located?
- Vivian Diep's practice location on file with NPPES is 2690 S White Rd Ste 50, San Jose, CA 95148-2075.
- What is Vivian Diep's phone number?
- The practice phone number listed in the NPPES registry for Vivian Diep is (408) 223-7000.
- Does Vivian Diep accept Medicare?
- Vivian Diep is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Vivian Diep's NPI active?
- Yes — Vivian Diep's NPI (1487167912) is active in the NPPES registry as of the last update on 2020-01-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.