Ngan Nguyen, D.O.
NPI 1407388010 · Hematology & Oncology Physician · Riverside, CA
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ngan Nguyen, D.O. is a Hematology & Oncology Physician provider in Riverside, CA (NPI 1407388010).
Provider details
- NPI number
- 1407388010
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Female
- Sole proprietor
- Yes
- License
- 20A17494 (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
9 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
360 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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 175 | $131 |
| Administration of Chemotherapy Into Vein, 1 Hour Or Less96413 | 71 | $136 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 36 | $94 |
| Assessment of Emotional Or Behavioral Problems96127 | 35 | $5 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 24 | $171 |
| Telephone Medical Discussion With Physician, 11-20 Minutes99442 | 19 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 31 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Letrozole | 96 | 41 |
| Dexamethasone | 50 | 19 |
| Ondansetronbrand: Ondansetron Odt | 48 | 39 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 35 | 19 |
| Anastrozole | 30 | 18 |
| Pantoprazole Sodium | 29 | — |
| Ondansetron Hcl/Pfbrand: Ondansetron Hcl | 27 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$5,974 across 255 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
Registry dates
- Enumerated
- 2017-04-02
- Last updated
- 2023-06-30
- Certified
- 2023-06-18
Frequently asked questions
- What is Ngan Nguyen's NPI number?
- Ngan Nguyen's National Provider Identifier (NPI) is 1407388010, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ngan Nguyen's specialty?
- Ngan Nguyen is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Ngan Nguyen located?
- Ngan Nguyen's practice location on file with NPPES is The Oncology Institute of Hope and Innovation, Riverside, CA 92506.
- What is Ngan Nguyen's phone number?
- The practice phone number listed in the NPPES registry for Ngan Nguyen is (951) 394-7028.
- Does Ngan Nguyen accept Medicare?
- Ngan Nguyen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ngan Nguyen's NPI active?
- Yes — Ngan Nguyen's NPI (1407388010) is active in the NPPES registry as of the last update on 2023-06-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.