Derrick Wong, M.D.
NPI 1194941104 · Hematology & Oncology Physician · Mountain View, CA
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Derrick Wong, M.D. is a Hematology & Oncology Physician provider in Mountain View, CA (NPI 1194941104).
Provider details
- NPI number
- 1194941104
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A82274 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
4,027 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 | 771 | $217 |
| 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 | 545 | $19 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 397 | $155 |
| Administration of Chemotherapy Into Vein, 1 Hour Or Less96413 | 302 | $177 |
| Infusion Into a Vein for Therapy, Prevention, Or Diagnosis, 1 Hour Or Less96365 | 260 | $85 |
| Injection of Additional New Drug Or Substance Into Vein |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 28 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Apixabanbrand: Eliquis | 164 | 45 |
| Acyclovir | 125 | 36 |
| Anastrozole | 116 | 32 |
| Prednisone | 67 | 18 |
| Hydroxyurea | 66 | 19 |
| Sulfamethoxazole/Trimethoprimbrand: Sulfamethoxazole-Trimethoprim | 49 | 13 |
| Prochlorperazine Maleate | 48 | 38 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$17 across 1 record (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
Registry dates
- Enumerated
- 2007-04-18
- Last updated
- 2011-12-02
Frequently asked questions
- What is Derrick Wong's NPI number?
- Derrick Wong's National Provider Identifier (NPI) is 1194941104, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Derrick Wong's specialty?
- Derrick Wong is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Derrick Wong located?
- Derrick Wong's practice location on file with NPPES is 701 E El Camino Real, Mountain View, CA 94040-2833.
- What is Derrick Wong's phone number?
- The practice phone number listed in the NPPES registry for Derrick Wong is (650) 934-7600.
- Does Derrick Wong accept Medicare?
- Derrick Wong is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Derrick Wong's NPI active?
- Yes — Derrick Wong's NPI (1194941104) is active in the NPPES registry as of the last update on 2011-12-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.