NATHAN YENNUMI TONLAAR M.D.
NPI 1811284375
Radiology - Radiation Oncology in Springfield, MO

Q: What is Nathan Tonlaar's NPI number?

The NPI number for Nathan Tonlaar is 1811284375. It was assigned to this individual provider in the NPPES registry on July 6, 2011.

Q: What is Nathan Tonlaar's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Radiation Oncology, with taxonomy code 2085R0001X.

Q: When was this NPI record last updated?

The NPPES record for Nathan Tonlaar was last updated on June 2, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since July 06, 2011PECOS EnrolledAccepts Medicare Assignment

2055 S FREMONT AVE, MERCY CLINIC RADIATION ONCOLOGY, CHAUB O'REILLY CENTER, SPRINGFIELD, MO 65804(417) 820-2468(417) 820-7794 Get Directions Write a Review

NPPES record last updated: June 2, 2016. Verified against the NPPES registry weekly; last sync: August 09, 2026.

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About Nathan Yennumi Tonlaar M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

NATHAN YENNUMI TONLAAR M.D. (NPI 1811284375) is an individual radiation oncology provider in Springfield, Missouri, licensed in Missouri (2016014780) and active in the NPI registry since July 2011. He is enrolled in Medicare PECOS, is affiliated with Mercy Hospital Springfield, and is a graduate of University Of Chicago, Pritzker School Of Medicine (2011).

NPPES Registry Identity

NPI1811284375

Entity TypeIndividualMale

Primary Taxonomy2085R0001X

Provider Legal NameNATHAN YENNUMI TONLAARCredential: M.D.

Location Address2055 S FREMONT AVE, MERCY CLINIC RADIATION ONCOLOGY, CHAUB O'REILLY CENTERSpringfield, MO 65804-2206

Mailing Address2055 S Fremont Ave, Mercy Clinic Radiation Oncology, Chaub O'reilly CenterSpringfield, MO 65804-2206 · (417) 820-2468 · Fax (417) 820-7794

Phone(417) 820-2468

Fax(417) 820-7794

Sole ProprietorNo

Medical School CMSUniversity Of Chicago, Pritzker School Of MedicineGraduated 2011

Enumeration DateJuly 6, 2011

Last NPPES UpdateJune 2, 2016

✔ NPI 1811284375 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyRadiology · Radiation OncologyAllopathic & Osteopathic Physicians

Taxonomy Code2085R0001X

Licenses✔ Licensed in MO · 2016014780✔ Licensed in MI · 4301099423

Definition

A radiologist who deals with the therapeutic applications of radiant energy and its modifiers and the study and management of disease, especially malignant tumors.

2055 S FREMONT AVE, Springfield, MO 65804

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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arkansas Health & Wellness, Ambetter from Home State Health, Ambetter from Sunflower Health Plan and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Nathan Yennumi Tonlaar M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID7911291117

PECOS Enrollment IDI20160811000338

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 17

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Ct guidance for insertion of radiation therapy fields 77014

CT guidance for insertion of radiation therapy fields involves using a CT scan to accurately map the area of your body where radiation will be applied. This ensures the radiation targets only the necessary area, minimizing impact to healthy tissues.

618 services84 patients

Design and construction of complex radiation treatment device 77334

The design and construction of a complex radiation treatment device is a process where a specialized instrument is created. This device targets harmful cells with high-energy rays to destroy or damage them, while minimizing impact on healthy cells. This aids in treating conditions like cancer.

162 services70 patients

Radiation treatment management, 5 treatment sessions 77427

Radiation treatment management involves a series of 5 sessions where targeted radiation is used to destroy or shrink cancer cells in your body. Each session is carefully planned to maximize effectiveness while minimizing harm to healthy tissues. You may experience side effects which will be closely monitored and managed for your comfort.

146 services63 patients

Calculation of radiation therapy dose 77300

Radiation therapy dose calculation is a process to determine the exact amount of radiation needed to treat a specific area in the body. This calculation helps ensure the treatment is effective while minimizing harm to healthy tissues. It's a key part of planning your radiation therapy.

126 services60 patients

Complex radiation therapy planning 77263

Complex radiation therapy planning is a process to determine the most effective way to deliver radiation to a specific area in your body. It involves detailed imaging to map your body's structure, allowing for precise targeting of cancer cells while sparing healthy tissue.

70 services64 patients

New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205

This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.

58 services58 patients

Design and construction of radiation treatment device for high precision radiation therapy 77338

A radiation treatment device is custom-made for each patient to target cancer cells with high precision. It's designed to focus radiation on the tumor, sparing healthy tissue. This process ensures effective therapy while minimizing side effects.

51 services50 patients

High precision radiation therapy planning 77301

High precision radiation therapy planning involves detailed mapping of your body to target cancer cells accurately. Advanced imaging techniques help identify the exact location of the tumor, minimizing harm to healthy tissues. This personalized approach enhances effectiveness and reduces side effects.

50 services49 patients

Management of cranial lesion surgery using radiation over multiple sessions 77435

This procedure involves using targeted radiation to treat a lesion in the brain over several sessions. The radiation destroys the abnormal cells, helping to control or eliminate the lesion. It's a non-invasive treatment, meaning no surgical cuts are made.

28 services28 patients

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 77290

This procedure involves collecting necessary data to plan the best radiation treatment. It may cover 3 or more areas or any area requiring special attention. Data collection includes imaging scans and tests to understand the disease's extent and to tailor a precise, effective treatment plan.

22 services22 patients

Injection of biodegradable material next to prostate 55874

This procedure involves the introduction of a biodegradable substance near a gland located in the lower abdomen. This substance helps to create a barrier between the gland and nearby tissues, aiding in the precise delivery of treatment to the intended area.

21 services21 patients

Placement of device in prostate for radiation therapy 55876

This procedure involves placing a small device in the gland below the bladder to deliver radiation therapy. This helps target therapy directly to the concerned area, potentially reducing side effects and improving treatment effectiveness.

21 services21 patients

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215

This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.

21 services21 patients

Obtaining data needed to develop the optimal radiation treatment, 1 treatment area 77280

This procedure involves gathering essential information to create the best radiation treatment plan for a specific area. It includes scanning the treatment area and using this data to calculate the precise dose of radiation needed to target the disease effectively, while sparing healthy tissue.

16 services15 patients

Obtaining respiratory data needed to develop the optimal radiation treatment 77293

Obtaining respiratory data is vital for optimal radiation treatment. This involves tracking your breathing patterns to ensure the precise delivery of radiation to the target area, minimizing damage to healthy tissue. It's a non-invasive process and contributes to effective treatment.

14 services14 patients

Special radiation treatment 77470

Special radiation treatment is a medical procedure that uses high-energy rays to destroy or damage cancer cells. It's a targeted approach that aims to minimize harm to healthy tissues. The treatment duration varies based on individual health conditions.

14 services14 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

11 services11 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Mercy Hospital Springfield

Acute Care Hospitals · Springfield, MO

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number260065

Location1235 E CherokeeSpringfield, MO 65804 · Greene County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 65804 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$161.24 typical visit price

range $52.28 – $161.24

Typical copayment $40.31 (range $13.07 – $40.31)

Most-billed visit code 99205

Established Patient

$65.71 typical visit price

range $16.30 – $131.05

Typical copayment $16.42 (range $4.07 – $32.76)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Referred Medical Equipment & Supplies CMS DME claims

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Electrical stimulation device used for cancer treatment, includes all accessories, any type E0766

DME-Other DME · category DE000N

1 supplier13 claims13 services$11,105.43 avg. paid by Medicare

Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. CHRISTOPHER FLEIGHTON ESTES M.D.

Radiology (Radiation Oncology)

2055 S FREMONT AVE
SPRINGFIELD, MO 65804

Greene County (417) 820-2468

ANGELA DEAN PRINGLE APRN FNP-C

Nurse Practitioner (Family)

2055 S FREMONT AVE
SPRINGFIELD, MO 65804

Greene County (417) 820-8099

VANESSA MCCONNELL FNP

Nurse Practitioner (Family)

2055 S FREMONT AVE, STE 200
SPRINGFIELD, MO 65804

Greene County (417) 820-3554

KELLY KOEHN MD

Internal Medicine (Hematology & Oncology)

2055 S FREMONT AVE
SPRINGFIELD, MO 65804

Greene County (417) 820-8099

JENNIFER NICHOLE MCVEY FNP

Nurse Practitioner (Family)

2055 S FREMONT AVE
SPRINGFIELD, MO 65804

Greene County (417) 820-8099

MAGGIE ANN GRAY FNP-C

Nurse Practitioner (Family)

2055 S FREMONT AVE
SPRINGFIELD, MO 65804

Greene County (417) 820-4673

MOHAN KRISHNA TUMMALA MD

Internal Medicine (Hematology & Oncology)

2055 S FREMONT AVE, SUITE 100
SPRINGFIELD, MO 65804

Greene County (417) 820-8099

JAY W CARLSON D.O.

Obstetrics & Gynecology (Gynecologic Oncology)

2055 S FREMONT AVE, STE 200
SPRINGFIELD, MO 65804

Greene County (417) 820-3554

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Nathan Tonlaar's NPI number?

The NPI number for Nathan Tonlaar is 1811284375. It was assigned to this individual provider in the NPPES registry on July 6, 2011.

Where is Nathan Tonlaar located?

Nathan Tonlaar practices at 2055 S Fremont Ave Mercy Clinic Radiation Oncology, Chaub O'reilly Center, Springfield, MO 65804. The listed phone number is (417) 820-2468.

What is Nathan Tonlaar's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Radiation Oncology, with taxonomy code 2085R0001X.

Is Nathan Tonlaar enrolled in Medicare?

Yes. Nathan Tonlaar is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does Nathan Tonlaar accept?

Health plans from Ambetter Health, Ambetter Health of Delaware, Ambetter from Arkansas Health & Wellness, Ambetter from Home State Health and Ambetter from Sunflower Health Plan and 5 other insurers list Nathan Tonlaar as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Nathan Tonlaar affiliated with any hospitals?

According to CMS data, Nathan Tonlaar is affiliated with Mercy Hospital Springfield.

When was this NPI record last updated?

The NPPES record for Nathan Tonlaar was last updated on June 2, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.