Robert Knudson, MD
NPI 1235170069 · Diagnostic Radiology Physician · Springfield, IL
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Robert Knudson, MD is a Diagnostic Radiology Physician provider in Springfield, IL (NPI 1235170069).
Provider details
- NPI number
- 1235170069
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 036109217 (IL)
Specialties & taxonomies
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
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
2,624 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) |
|---|---|---|
| Piflufolastat F-18, Diagnostic, 1 MillicurieA9595 | 576 | $640 |
| Nuclear Medicine Study From Skull Base to Mid-Thigh With Ct Scan78815 | 309 | $1,457 |
| Fluorodeoxyglucose F-18 Fdg, Diagnostic, Per Study Dose, Up to 45 MillicuriesA9552 | 258 | $445 |
| X-Ray of Chest, 1 View71045 | 227 | $8 |
| Nuclear Medicine Study From Skull Base to Mid-Thigh With Ct Scan78815 | 109 | $110 |
| X-Ray of Chest, 2 Views71046 | 102 | $10 |
| Ct Scan Head Or Brain Without Contrast |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-06-10
- Last updated
- 2022-08-22
- Certified
- 2022-08-22
Frequently asked questions
- What is Robert Knudson's NPI number?
- Robert Knudson's National Provider Identifier (NPI) is 1235170069, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Robert Knudson's specialty?
- Robert Knudson is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Robert Knudson located?
- Robert Knudson's practice location on file with NPPES is 1025 S 6th St, Springfield, IL 62703-2499.
- What is Robert Knudson's phone number?
- The practice phone number listed in the NPPES registry for Robert Knudson is (217) 528-7541.
- Does Robert Knudson accept Medicare?
- Robert Knudson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Robert Knudson's NPI active?
- Yes — Robert Knudson's NPI (1235170069) is active in the NPPES registry as of the last update on 2022-08-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.