Isabella Chen, M.D.
NPI 1053621730 · Hematology & Oncology Physician · Ventura, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Isabella Chen, M.D. is a Hematology & Oncology Physician provider in Ventura, CA (NPI 1053621730).
Provider details
- NPI number
- 1053621730
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- A118096 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
15 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
894 Medicare services, 2024 (ranked within specialty)
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 methodology.
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 | 484 | $99 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 251 | $148 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 118 | $137 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 25 | $192 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 16 | $186 |
Typical Medicare-allowed amounts for these services range $99–$192 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 26 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Anastrozole | 59 | 20 |
| Ondansetron Hcl | 35 | 18 |
| Apixabanbrand: Eliquis | 34 | — |
| Ondansetronbrand: Ondansetron Odt | 31 | — |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 30 | — |
| Rivaroxabanbrand: Xarelto | 29 | — |
| Omeprazole |
Practice location
Mailing address
Registry dates
- Enumerated
- 2010-10-15
- Last updated
- 2025-09-29
- Certified
- 2025-09-29
Frequently asked questions
- What is Isabella Chen's NPI number?
- Isabella Chen's National Provider Identifier (NPI) is 1053621730, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Isabella Chen's specialty?
- Isabella Chen is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Isabella Chen located?
- Isabella Chen's practice location on file with NPPES is 300 Hillmont Ave, Ventura, CA 93003.
- What is Isabella Chen's phone number?
- The practice phone number listed in the NPPES registry for Isabella Chen is (805) 652-6218.
- Does Isabella Chen accept Medicare?
- Isabella Chen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Isabella Chen's NPI active?
- Yes — Isabella Chen's NPI (1053621730) is active in the NPPES registry as of the last update on 2025-09-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.