Katherine Nguyen, M.D.
NPI 1134308703 · Hematology & Oncology Physician · Seattle, WA
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Katherine Nguyen, M.D. is a Hematology & Oncology Physician provider in Seattle, WA (NPI 1134308703).
Provider details
- NPI number
- 1134308703
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- A81558 (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 tenure38% of score
18 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 9 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Letrozole | 61 | 22 |
| Anastrozole | 48 | 22 |
| Hydroxyurea | 28 | — |
| Omeprazole | 22 | — |
| Ondansetron Hcl | 18 | — |
| Tamoxifen Citrate | 17 | — |
| Gabapentin | 14 | — |
| Prochlorperazine Maleate | 12 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-10-30
- Last updated
- 2021-04-28
- Certified
- 2021-04-28
Frequently asked questions
- What is Katherine Nguyen's NPI number?
- Katherine Nguyen's National Provider Identifier (NPI) is 1134308703, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Katherine Nguyen's specialty?
- Katherine Nguyen is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Katherine Nguyen located?
- Katherine Nguyen's practice location on file with NPPES is 201 16th Ave E, Seattle, WA 98112-5226.
- What is Katherine Nguyen's phone number?
- The practice phone number listed in the NPPES registry for Katherine Nguyen is (206) 326-3111.
- Does Katherine Nguyen accept Medicare?
- Katherine Nguyen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Katherine Nguyen's NPI active?
- Yes — Katherine Nguyen's NPI (1134308703) is active in the NPPES registry as of the last update on 2021-04-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.