Mykola Onyshchenko, MD, PHD
NPI 1821342775 · Medical Oncology Physician · Duarte, CA
Enrolled with Medicare as Practitioner - Medical Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mykola Onyshchenko, MD, PHD is a Medical Oncology Physician provider in Duarte, CA (NPI 1821342775).
Provider details
- NPI number
- 1821342775
- Entity type
- Individual
- Primary specialty
- Medical Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD, PHD
- Sex
- Male
- Sole proprietor
- No
- License
- A136383 (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
13 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
1,076 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 | 476 | $97 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 340 | $16 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 58 | $182 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 57 | $79 |
| Telephone Medical Discussion With Physician, 11-20 Minutes99442 | 46 | $66 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 13 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisone | 62 | 27 |
| Prochlorperazine Maleate | 50 | 35 |
| Ondansetronbrand: Ondansetron Odt | 36 | 32 |
| Dexamethasone | 33 | 17 |
| Ondansetron Hcl | 30 | 24 |
| Apixabanbrand: Eliquis | 29 | — |
| Abiraterone Acetate | 25 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,780 across 8 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
- 2012-10-30
- Last updated
- 2022-08-19
- Certified
- 2022-08-19
Frequently asked questions
- What is Mykola Onyshchenko's NPI number?
- Mykola Onyshchenko's National Provider Identifier (NPI) is 1821342775, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mykola Onyshchenko's specialty?
- Mykola Onyshchenko is listed in the NPPES registry with a primary specialty of Medical Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Mykola Onyshchenko located?
- Mykola Onyshchenko's practice location on file with NPPES is 1500 Duarte Rd, Duarte, CA 91010-3012.
- What is Mykola Onyshchenko's phone number?
- The practice phone number listed in the NPPES registry for Mykola Onyshchenko is (626) 256-4673.
- Does Mykola Onyshchenko accept Medicare?
- Mykola Onyshchenko is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mykola Onyshchenko's NPI active?
- Yes — Mykola Onyshchenko's NPI (1821342775) is active in the NPPES registry as of the last update on 2022-08-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.