ROBERT RYN JOHNSON M.D. NPI 1598942781

NPI Information

  • NPI: 1598942781
  • Provider Name: ROBERT RYN JOHNSON, M.D.
  • Classification: Radiology - 2085R0203X
  • Specialization: Therapeutic Radiology
  • Entity Type: Individual
  • PECOS Registration: Yes
  • Address: 100 CASA ST STE C
    SAN LUIS OBISPO, CA
    ZIP 93405
  • Phone: (805) 541-1932

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NPI Details

Robert Ryn Johnson, M.D. is a therapeutic radiology radiology in San Luis Obispo, CA with 19 years of experience. The provider is therapeutic Radiology certificate name was changed to Radiation Oncology. Use Radiation Oncology. Robert Ryn Johnson, M.D. NPI is 1598942781. The provider is registered as an individual entity type.

The NPPES NPI record indicates the provider is a male.

Education
Medical School: CINCINNATI COLLEGE OF MEDICINE AND SURGERY
Graduation Year:2007

The provider's business location address is:

100 CASA ST STE C
SAN LUIS OBISPO, CA
ZIP 93405-804
Phone: (805) 541-1932
Fax: (805) 541-1653

The NPI 1598942781 is registered in the Medicare Provider, Enrollment, Chain and Ownership System (PECOS). The provider is legally eligible to order and refer Part B (Clinical Laboratory and Imaging), Durable Medical Equipment, Part A Home Health Agency (HHA), Power Mobility Devices.

The following top HCPCS codes were publicly reported for this provider under the Medicare program for the year 2016. The reported codes are based on the top codes for each available Medicare specialty, excluding evaluation and management codes.

  • Intensity modulated treatment delivery, single or multiple fields/arcs,via narrow spatially and temporally modulated beams, binary, dynamic mlc, per treatment session (HCPCS:G6015)
  • Ct guidance for insertion of radiation therapy fields (HCPCS:77014)
  • Radiation treatment delivery,3 or more separate treatment areas, custom blocking, tangential ports, wedges, rotational beam, compensators, electron beam; 6-10 mev (HCPCS:G6012)
  • Continuing radiation therapy consultation per week (HCPCS:77336)
  • Stereoscopic x-ray guidance for localization of target volume for the delivery of radiation therapy (HCPCS:G6002)
  • Calculation of radiation therapy dose (HCPCS:77300)
  • Radiation treatment management, 5 treatment sessions (HCPCS:77427)
  • Design and construction of complex radiation treatment device (HCPCS:77334)
  • Complex radiation therapy planning (HCPCS:77263)
  • Cranial lesion surgery using radiation over multiple sessions (HCPCS:77373)
  • Established patient office or other outpatient visit, 20-29 minutes (HCPCS:99213)
  • Radiation treatment delivery,3 or more separate treatment areas, custom blocking, tangential ports, wedges, rotational beam, compensators, electron beam; 11-19 mev (HCPCS:G6013)
  • Design and construction of radiation treatment device for high precision radiation therapy (HCPCS:77338)
  • High precision radiation therapy planning (HCPCS:77301)
  • X-ray during radiation therapy (HCPCS:77417)
  • New patient office or other outpatient visit, 60-74 minutes (HCPCS:99205)
  • Established patient office or other outpatient visit, 10-19 minutes (HCPCS:99212)
  • Obtaining data needed to develop the optimal radiation treatment, 1 treatment area (HCPCS:77280)
  • New patient office or other outpatient visit, 45-59 minutes (HCPCS:99204)
  • Obtaining data needed to develop the optimal radiation treatment, 3 or more treatment areas or any number of treatment areas where special treatment is involved (HCPCS:77290)
  • Management of cranial lesion surgery using radiation over multiple sessions (HCPCS:77435)
  • Established patient office or other outpatient visit, 30-39 minutes (HCPCS:99214)
  • 3d radiation therapy planning (HCPCS:77295)
  • Established patient office or other outpatient visit, 40-54 minutes (HCPCS:99215)
  • Telephone medical discussion with physician, 5-10 minutes (HCPCS:99441)
  • Special radiation treatment (HCPCS:77470)
  • Special radiation therapy planning (HCPCS:77331)
  • Telephone medical discussion with physician, 11-20 minutes (HCPCS:99442)
  • Special radiation therapy planning for delivery of external radiation (HCPCS:77321)

The enumeration date for this NPI number is 1/30/2008 and was last updated on 10/21/2022.

Taxonomy Codes

The NPI record includes the healthcare provider taxonomy classification, state license number and state of licensure. The following information regarding the scope of practice of this provider is available:

No. Taxonomy Code Taxonomy Clasification Taxonomy Specialization License Number License State Primary
12085R0203XRadiologyTherapeutic RadiologyA121032CALIFORNIAYes

Other Identifiers

The following information regarding additional identifiers associated to this NPI record includes the other identifier number, identifier type, identifier state and issuer.

No. Other Provider Identifier Other Provider Identifier Type Other Provider Identifier State Other Provider Identifier Issuer
11598942781MEDICAIDCALIFORNIA

What is NPI?

NPI stands for National Provider Identifier. The NPI is a 10-digit identification number that is completely unique. The NPI number by itself does not contain any identifiable information such as a provider’s speciality or location. The NPI is assigned to individuals or organizacions for their lifespan and it is independent of key provider information type updates like a change of practices, location or speciality.

This page was last updated on: 11/21/2025

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