David Ly, MD
NPI 1477879864 · Radiation Oncology Physician · Visalia, CA
Enrolled with Medicare as Practitioner - Radiation Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
David Ly, MD is a Radiation Oncology Physician provider in Visalia, CA (NPI 1477879864).
Provider details
- NPI number
- 1477879864
- Entity type
- Individual
- Primary specialty
- Radiation Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- A141368 (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
16 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
4,658 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) |
|---|---|---|
| Ct Guidance for Insertion of Radiation Therapy Fields77014 | 1,071 | $47 |
| Ct Guidance for Insertion of Radiation Therapy Fields77014 | 590 | $47 |
| Calculation of Radiation Therapy Dose77300 | 393 | $35 |
| Radiation Treatment Management, 5 Treatment Sessions77427 | 345 | $202 |
| Design and Construction of Complex Radiation Treatment Device77334 | 200 | $64 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 190 | $101 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 4 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Silver Sulfadiazinebrand: Ssd | 26 | 19 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 20 | — |
| Tamsulosin Hcl | 18 | — |
| Dexamethasone | 16 | 12 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$20 across 1 record (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
- 2010-04-12
- Last updated
- 2026-02-19
- Certified
- 2026-02-19
Frequently asked questions
- What is David Ly's NPI number?
- David Ly's National Provider Identifier (NPI) is 1477879864, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is David Ly's specialty?
- David Ly is listed in the NPPES registry with a primary specialty of Radiation Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is David Ly located?
- David Ly's practice location on file with NPPES is 4945 W Cypress Ave, Visalia, CA 93277-1592.
- What is David Ly's phone number?
- The practice phone number listed in the NPPES registry for David Ly is (559) 624-3100.
- Does David Ly accept Medicare?
- David Ly is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is David Ly's NPI active?
- Yes — David Ly's NPI (1477879864) is active in the NPPES registry as of the last update on 2026-02-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.