Hoa Nguyen, M.D.
NPI 1528083664 · Hematology & Oncology Physician · Marysville, CA
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Hoa Nguyen, M.D. is a Hematology & Oncology Physician provider in Marysville, CA (NPI 1528083664).
Provider details
- NPI number
- 1528083664
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A77714 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
1,186 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 | 641 | $95 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 323 | $142 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 126 | $178 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 34 | $170 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 28 | $65 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 17 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Ondansetron Hcl | 77 | 43 |
| Anastrozole | 58 | 23 |
| Promethazine Hcl | 39 | 26 |
| Dexamethasone | 31 | 17 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 26 | 11 |
| Letrozole | 24 | — |
| Prednisone | 21 | — |
| Pomalidomide |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$152 across 3 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
- 2006-07-12
- Last updated
- 2020-06-11
- Certified
- 2020-06-11
Frequently asked questions
- What is Hoa Nguyen's NPI number?
- Hoa Nguyen's National Provider Identifier (NPI) is 1528083664, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Hoa Nguyen's specialty?
- Hoa Nguyen is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Hoa Nguyen located?
- Hoa Nguyen's practice location on file with NPPES is 618 5th St, Marysville, CA 95901-5612.
- What is Hoa Nguyen's phone number?
- The practice phone number listed in the NPPES registry for Hoa Nguyen is (530) 749-4400.
- Does Hoa Nguyen accept Medicare?
- Hoa Nguyen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Hoa Nguyen's NPI active?
- Yes — Hoa Nguyen's NPI (1528083664) is active in the NPPES registry as of the last update on 2020-06-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.