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Edit this profileAt a glance
- 2055 S Fremont Ave, Mercy Clinic Radiation Oncology, Chaub O'reilly Center, Springfield, MO 65804
About Dr. Tonlaar
Nathan Y. Tonlaar, M.D. practices radiation oncology in Springfield, MO. Nathan is a 2011 graduate of University of Chicago, Pritzker School of Medicine. Medicare claims data shows Nathan provided 1,449 services to 665 patients. The services billed most often include ct guidance for insertion of radiation therapy fields, design and construction of complex radiation treatment device, and radiation treatment management, 5 treatment sessions. The provider's National Provider Identifier (NPI) is 1811284375.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (417) 820-2468
- Email not available
Practice Locations
2055 S FREMONT AVE MERCY CLINIC RADIATION ONCOLOGY, CHAUB O'REILLY CENTER
Springfield, MO 65804
Conditions Commonly Evaluated or Treated
Within Radiation Oncology generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Cancer care
Most searched conditions
Benign condition
Blood and lymph cancer
Bone cancer
Brain tumors
Cancer emergencies
Chest cancer
Endocrine cancer
Eye cancer
Eye conditions
Foot conditions
Gastrointestinal cancer
- Anal cancer
- Bile duct cancer
- Colon cancer
- Esophageal cancer
- Gallbladder cancer
- Liver cancer
- Pancreatic cancer
- Stomach cancer
Gynecologic cancer
Head & neck cancer
Head and neck cancer
Metastatic cancer
Neurologic condition
Orthopedic conditions
Sarcoma
Skin cancer
Thoracic cancer
Urologic cancer
Vascular conditions
Procedures & services
Most searched procedures
Advanced radiation
Benign treatment
Brain radiation
Cancer treatment
Central nervous system
Consultation
External radiation
- Electron beam therapy
- Image-guided radiation (IGRT)
- IMRT (Targeted intensity radiation)
- RapidArc / VMAT radiation
- Total body irradiation (TBI)
Eye cancer treatment
Follow-up care
Heart treatments
Internal radiation
Pain and symptom relief
Particle therapy
Precision radiation
- Adaptive radiation therapy
- Heart-sparing breath hold radiation (DIBH)
- Spine radiosurgery
- Stereotactic body radiation (SBRT)
- Stereotactic radiosurgery (SRS)
- Tattoo-free radiation
Prostate cancer treatment
Prostate protection
Radiation therapy
Skin cancer treatment
Skin lymphoma treatment
Specialized radiation
Targeted isotopes
Targeted radiation drugs
Treatment planning
Procedures Most Often Billed to Medicare
1,449 services · 665 patients · 17 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Placement of device in prostate for radiation therapy | Procedure | 55876 |
21 | As often as other peers in Radiation Oncology |
| Injection of biodegradable material next to prostate | Procedure | 55874 |
21 | As often as other peers in Radiation Oncology |
| Ct guidance for insertion of radiation therapy fields | Imaging | 77014 |
618 | More often than most peers in Radiation Oncology |
| Design and construction of complex radiation treatment device | Imaging | 77334 |
162 | More often than most peers in Radiation Oncology |
| Radiation treatment management, 5 treatment sessions | Imaging | 77427 |
146 | As often as other peers in Radiation Oncology |
| Calculation of radiation therapy dose | Imaging | 77300 |
126 | Less often than most peers in Radiation Oncology |
| Complex radiation therapy planning | Imaging | 77263 |
70 | More often than most peers in Radiation Oncology |
| Design and construction of radiation treatment device for high precision radiation therapy | Imaging | 77338 |
51 | More often than most peers in Radiation Oncology |
| High precision radiation therapy planning | Imaging | 77301 |
50 | More often than most peers in Radiation Oncology |
| Management of cranial lesion surgery using radiation over multiple sessions | Imaging | 77435 |
28 | More often than most peers in Radiation Oncology |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related 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 oncologists at this location 4
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 8
Clinically related specialties at the same address — the people this provider most likely works alongside.
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.
More connections — 25 related providers in 4 groups
Other radiation oncologists in Springfield 4
Same specialty, same city.
Trained at University of Chicago, Pritzker School of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 2011 at University of Chicago, Pritzker School of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Placement of device in prostate for radiation therapy 5
Providers in MO who bill this service to Medicare most often.
Common questions
What does Nathan Y. Tonlaar specialize in?
Nathan Y. Tonlaar is a radiation oncologist in Springfield, MO. That is the designation recorded for this NPI in the federal registry, where it is listed as “Radiation Oncology”.
NPI registry
Where is Nathan Y. Tonlaar located?
Nathan Y. Tonlaar is listed at 2055 S Fremont Ave Mercy Clinic Radiation Oncology, Chaub O'reilly Center, Springfield, MO 65804. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Nathan Y. Tonlaar's phone number?
The number on file is (417) 820-2468. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for Nathan Y. Tonlaar?
Nathan Y. Tonlaar's National Provider Identifier is 1811284375. 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
Where did Nathan Y. Tonlaar train?
Nathan Y. Tonlaar attended University of Chicago, Pritzker School of Medicine, graduating in 2011. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Nathan Y. Tonlaar have?
Nathan Y. Tonlaar has 15 years experience. Calculated from a graduation year of 2011, reported in the CMS National Downloadable File.
CMS public data
What does Nathan Y. Tonlaar do most often?
According to Medicare billing data, Nathan Y. Tonlaar performs procedures including placement of device in prostate for radiation therapy and injection of biodegradable material next to prostate; reads or performs imaging such as ct guidance for insertion of radiation therapy fields and design and construction of complex radiation treatment device, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Nathan Y. Tonlaar's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Nathan Y. Tonlaar. If this is you, claiming it is free.
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