Jiyon Choi, MD
NPI 1144437567 · Hematology & Oncology Physician · Antioch, CA
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jiyon Choi, MD is a Hematology & Oncology Physician provider in Antioch, CA (NPI 1144437567).
Provider details
- NPI number
- 1144437567
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- A106992 (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
4,779 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) |
|---|---|---|
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 721 | $9 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 586 | $8 |
| Infusion Into a Vein for Therapy, Prevention, Or Diagnosis, Additional Sequential Infusion, 1 Hour Or Less96367 | 442 | $38 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 415 | $18 |
| Telephone Medical Discussion With Physician, 11-20 Minutes99442 | 373 | $113 |
| Administration of Chemotherapy Into Vein, 1 Hour Or Less96413 | 328 | $174 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 32 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Letrozole | 107 | 28 |
| Anastrozole | 89 | 28 |
| Apixabanbrand: Eliquis | 88 | 24 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 52 | 24 |
| Palbociclibbrand: Ibrance | 51 | — |
| Ondansetron Hcl | 50 | 31 |
| Lorazepam | 48 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$3,609 across 159 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
- 2007-05-16
- Last updated
- 2013-04-18
Frequently asked questions
- What is Jiyon Choi's NPI number?
- Jiyon Choi's National Provider Identifier (NPI) is 1144437567, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jiyon Choi's specialty?
- Jiyon Choi is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Jiyon Choi located?
- Jiyon Choi's practice location on file with NPPES is 4721 Dallas Ranch Rd, Antioch, CA 94531-8811.
- What is Jiyon Choi's phone number?
- The practice phone number listed in the NPPES registry for Jiyon Choi is (925) 778-0679.
- Does Jiyon Choi accept Medicare?
- Jiyon Choi is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jiyon Choi's NPI active?
- Yes — Jiyon Choi's NPI (1144437567) is active in the NPPES registry as of the last update on 2013-04-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.