Stephen Ko, MD
NPI 1134183304 · Radiation Oncology Physician · Jacksonville, FL
Enrolled with Medicare as Practitioner - Radiation Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Stephen Ko, MD is a Radiation Oncology Physician provider in Jacksonville, FL (NPI 1134183304).
Provider details
- NPI number
- 1134183304
- Entity type
- Individual
- Primary specialty
- Radiation Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 2025045903 (MO)
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 tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
915 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) |
|---|---|---|
| Calculation of Radiation Therapy Dose77300 | 211 | $30 |
| Radiation Treatment Management, 5 Treatment Sessions77427 | 183 | $173 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 145 | $87 |
| Design and Construction of Complex Radiation Treatment Device77334 | 94 | $55 |
| Complex Radiation Therapy Planning77263 | 69 | $148 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 62 | $164 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 3 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 18 | 13 |
| Oxycodone Hcl | 15 | — |
| Tamsulosin Hcl | 15 | — |
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.
Practice location
Mailing address
Additional practice locations (1)
- 1241 W Stadium BlvdJefferson City, MO 65109-6023Phone: (573) 635-2282Fax: (573) 635-2536
Registry dates
- Enumerated
- 2006-04-14
- Last updated
- 2025-12-19
- Certified
- 2025-12-19
Frequently asked questions
- What is Stephen Ko's NPI number?
- Stephen Ko's National Provider Identifier (NPI) is 1134183304, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Stephen Ko's specialty?
- Stephen Ko is listed in the NPPES registry with a primary specialty of Radiation Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Stephen Ko located?
- Stephen Ko's practice location on file with NPPES is 4500 San Pablo Rd S, Jacksonville, FL 32224-1865.
- What is Stephen Ko's phone number?
- The practice phone number listed in the NPPES registry for Stephen Ko is (904) 953-2000.
- Does Stephen Ko accept Medicare?
- Stephen Ko is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Stephen Ko's NPI active?
- Yes — Stephen Ko's NPI (1134183304) is active in the NPPES registry as of the last update on 2025-12-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.