Physician Profile
Unclaimed ProfileAbout JOHNSON
Robert Ryn Johnson, M.D. is a healthcare provider in San Luis Obispo, CA specialising in radiation oncology. Robert trained at Cincinnati College of Medicine and Surgery, graduating in 2007. Robert is also listed as specialising in therapeutic radiology.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Common questions
What is Dr. Johnson's specialty?
Dr. Johnson is a radiation oncology in San Luis Obispo, CA. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “RADIATION ONCOLOGY”.
NPI registry
Where can I find Dr. Johnson?
Dr. Johnson is listed at 100 CASA ST STE C, San Luis Obispo, CA 93405. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Dr. Johnson?
The number on file is (805) 541-1932. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Dr. Johnson?
Dr. Johnson's National Provider Identifier is 1598942781. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
What is Dr. Johnson's medical education?
Dr. Johnson attended Cincinnati College of Medicine and Surgery, graduating in 2007. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Johnson have?
Dr. Johnson has 19 years experience. Calculated from a graduation year of 2007, reported in the CMS National Downloadable File.
CMS public data
What is Dr. Johnson known for?
According to Medicare billing data, Dr. Johnson performs imaging including ct guidance for insertion of radiation therapy fields and continuing radiation therapy consultation per week, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Johnson's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Johnson. If this is you, claiming it is free.
Guide.md
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (805) 541-1932
- Email not available
Practice Locations
100 CASA ST STE C
San Luis Obispo, CA 93405
Procedures Most Often Billed to Medicare
5,537 services · 1,572 patients · 25 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Ct guidance for insertion of radiation therapy fields | Imaging | 77014 |
950 |
| Continuing radiation therapy consultation per week | Imaging | 77336 |
394 |
| Radiation treatment management, 5 treatment sessions | Imaging | 77427 |
354 |
| Calculation of radiation therapy dose | Imaging | 77300 |
343 |
| Superficial and/or low voltage radiation treatment delivery | Imaging | 77401 |
292 |
| Design and construction of complex radiation treatment device | Imaging | 77334 |
186 |
| Complex radiation therapy planning | Imaging | 77263 |
111 |
| Cranial lesion surgery using radiation over multiple sessions | Imaging | 77373 |
103 |
| Design and construction of radiation treatment device for high precision radiation therapy | Imaging | 77338 |
91 |
| High precision radiation therapy planning | Imaging | 77301 |
89 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
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Claim this profileRelated providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other radiation oncology specialists at this location 4
Same specialty, same street address — most likely the same department or group.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Trained at Cincinnati College of Medicine and Surgery 1
Other providers in the same specialty who trained at the same institution.
More connections — 11 related providers in 2 groups
Class of 2007 at Cincinnati College of Medicine and Surgery 3
Providers who graduated from the same medical school in the same year.
Also performs Ct guidance for insertion of radiation therapy fields 8
Providers in CA who bill this service to Medicare most often.
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.