MRS. NATALIE KETSIA ALPHONSE SULLIVAN M.D.
NPI 1003255761
Radiology - Radiation Oncology in Alexandria, LA

Q: What is Natalie Alphonse Sullivan's NPI number?

The NPI number for Natalie Alphonse Sullivan is 1003255761. It was assigned to this individual provider in the NPPES registry on June 17, 2013.

Q: What is Natalie Alphonse Sullivan's specialty?

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

Active since June 17, 2013PECOS EnrolledAccepts Medicare Assignment

75/100

CMS Quality Rating

3330 MASONIC DR, ALEXANDRIA, LA 71301(318) 448-6917(225) 286-7917 Get Directions Write a Review

NPPES record last updated: February 12, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jun 12, 2025, Dec 18, 2020 (2 updates tracked since 2020).

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About Mrs. Natalie Ketsia Alphonse Sullivan M.d. NPPES

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

MRS. NATALIE KETSIA ALPHONSE SULLIVAN M.D. (NPI 1003255761) is an individual radiation oncology provider in Alexandria, Louisiana, licensed in Florida (ME148133) and active in the NPI registry since June 2013. She is enrolled in Medicare PECOS, is affiliated with Christus St Frances Cabrini Hospital, and is a graduate of Wake Forest University School Of Medicine (2013).

NPPES Registry Identity

NPI1003255761

Entity TypeIndividualFemale

Primary Taxonomy2085R0001X

Provider Legal NameMRS. NATALIE KETSIA ALPHONSE SULLIVANCredential: M.D.

Location Address3330 MASONIC DRAlexandria, LA 71301-3841

Mailing AddressPo Box 1300Gonzales, LA 70707-1300 · (225) 644-3940 · Fax (225) 286-7917

Phone(318) 448-6917

Fax(225) 286-7917

Sole ProprietorNo

Medical School CMSWake Forest University School Of MedicineGraduated 2013

Enumeration DateJune 17, 2013

Last NPPES UpdateFebruary 12, 20262 updates tracked since enumeration

NPPES CertifiedFebruary 12, 2026

✔ NPI 1003255761 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 FL · ME148133✔ Licensed in LA · 344149

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.

3330 MASONIC DR, Alexandria, LA 71301

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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 Louisiana Healthcare Connections, Ambetter from Superior HealthPlan and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Mrs. Natalie Ketsia Alphonse Sullivan 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 ID2961816137

PECOS Enrollment IDI20210129000233, I20250121001225

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.

Medicare Billing Reassignments

Medicare enrollment records show Natalie Alphonse Sullivan reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Nkas MD Consulting

Same address

Radiation Oncology

3330 MASONIC DR
Alexandria, LA 71301

Reassigned Medicare billing, Louisiana enrollment

NPI 1306656616 (318) 448-6917

Christus Trinity Clinic Texas

182 mi

Family Medicine

520 DOUGLAS BLVD
Tyler, TX 75702

Reassigned Medicare billing, Louisiana enrollment
213 clinicians in this Medicare group

NPI 1285684225 (903) 315-4119

21st Century Oncology LLC

351 mi

Urology

914B MAR WALT DR
Fort Walton Beach, FL 32547

Reassigned Medicare billing, Florida enrollment
Medicare enrollment name: Genesiscare Usa Of Florida LLC
284 clinicians in this Medicare group

NPI 1306234174 (850) 226-6572

Lakeland Regional Health Systems, Inc.

670 mi

Multi-Specialty

1324 LAKELAND HILLS BLVD, FINANCE DEPARTMENT
Lakeland, FL 33805

Reassigned Medicare billing, Florida enrollment
740 clinicians in this Medicare group

NPI 1497748743 (863) 687-7251

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 25

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.

Intensity modulated treatment delivery, single or multiple fields/arcs,via narrow spatially and temporally modulated beams, binary, dynamic mlc, per treatment session G6015

Intensity-modulated radiation therapy (IMRT) is a type of cancer treatment. It uses advanced technology to manipulate photon beams of radiation to conform to the shape of a tumor. IMRT allows for the radiation dose to conform more precisely to the three-dimensional shape of the tumor by modulatingâ€”or controllingâ€”the intensity of the radiation beam. This can result in better tumor control and less harm to healthy tissue.

1,996 services97 patients

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.

1,454 services129 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.

959 services152 patients

Stereoscopic x-ray guidance for localization of target volume for the delivery of radiation therapy G6002

Stereoscopic x-ray guidance is a technique used in radiation therapy. It involves taking multiple X-ray images from different angles to create a 3D picture of the area to be treated. This helps accurately pinpoint the exact location for radiation delivery, ensuring the therapy is as effective as possible.

873 services68 patients

Continuing radiation therapy consultation per week 77336

Continuing radiation therapy consultation per week involves regular meetings with your healthcare team. These sessions help monitor your progress, manage side effects, and adjust your treatment plan if necessary. It's a key part of ensuring the effectiveness of your radiation therapy.

542 services150 patients

Radiation treatment delivery,3 or more separate treatment areas, custom blocking, tangential ports, wedges, rotational beam, compensators, electron beam; 6-10 mev G6012

Radiation therapy involves directing high-energy particles to destroy cancer cells. The technique targets 3 or more areas, using custom blocks for precise focus. Tangential ports, wedges, and rotational beams adjust the radiation's path, while compensators balance radiation dose. Electron beam therapy with 6-10 mev energy is used for deep-seated tumors.

523 services37 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.

496 services133 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.

262 services148 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.

150 services148 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.

117 services112 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.

115 services111 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.

92 services92 patients

Radiation treatment delivery,3 or more separate treatment areas, custom blocking, tangential ports, wedges, rotational beam, compensators, electron beam; 11-19 mev G6013

This procedure involves using high-energy radiation to target and treat disease. It covers 3 or more distinct areas, using custom blocks to protect healthy tissue. Tangential ports, wedges, and rotational beams help direct the radiation. An electron beam of 11-19 million electron volts (mev) is used for deep-seated conditions.

88 services13 patients

Cranial lesion surgery using radiation over multiple sessions 77373

Cranial lesion surgery using radiation involves targeting abnormal tissue in the brain with high-energy rays. This non-invasive procedure is done over multiple sessions to gradually destroy the lesion without harming healthy tissue. It's a precise, painless process often used when traditional surgery isn't possible.

85 services18 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

84 services75 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

82 services67 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.

50 services43 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.

40 services40 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.

37 services35 patients

3d radiation therapy planning 77295

3D radiation therapy planning is a procedure that uses computer imaging to map out the area needing treatment. This ensures the radiation targets the disease precisely, while minimizing exposure to surrounding healthy tissues. It's a key step in preparing for effective radiation therapy.

33 services31 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.

32 services32 patients

Special radiation therapy planning 77331

Special radiation therapy planning is a process to determine the most effective way to deliver radiation treatment. It involves imaging studies to map your body's internal structure, which helps in targeting the exact area needing treatment while sparing healthy tissues.

31 services15 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.

29 services26 patients

Design and construction of simple radiation treatment device 77332

A simple radiation treatment device is designed and built to target specific areas in your body with high energy rays. This process is carefully planned to ensure that the radiation accurately reaches the area needing treatment, while minimizing exposure to healthy tissues.

23 services21 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.

18 services17 patients

Hospital Affiliations CMS Care Compare

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

Christus St Frances Cabrini Hospital

Acute Care Hospitals · Alexandria, LA

1/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number190019

Location3330 Masonic DriveAlexandria, LA 71301 · Rapides County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 71301 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

$164.73 typical visit price

range $53.43 – $164.73

Typical copayment $41.18 (range $13.35 – $41.18)

Most-billed visit code 99205

Established Patient

$67.06 typical visit price

range $16.64 – $133.62

Typical copayment $16.76 (range $4.16 – $33.40)

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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

75/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Individually scored

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. HAFEZ HALAWANI MD

Internal Medicine (Hematology & Oncology)

3330 MASONIC DR
ALEXANDRIA, LA 71301

Rapides Parish (318) 448-6917

CHRISTUS CONTINUING CARE

Long Term Care Hospital

3330 MASONIC DR, 4TH FLOOR
ALEXANDRIA, LA 71301

Rapides Parish (318) 448-6505

DR. KELLY RYDER M.D.

Internal Medicine

3330 MASONIC DR
ALEXANDRIA, LA 71301

Rapides Parish (318) 320-4422

IFEDOLAPO SULYMAN OLANREWAJU M.D.

Family Medicine

3330 MASONIC DR
ALEXANDRIA, LA 71301

Rapides Parish (318) 487-1122

CHRISHONDA MARIE WHITLOCK PA-C

Physician Assistant

3330 MASONIC DR
ALEXANDRIA, LA 71301

Rapides Parish (318) 487-1122

CARRIE J BARHAM CNP

Nurse Practitioner (Psychiatric/Mental Health)

3330 MASONIC DR
ALEXANDRIA, LA 71301

Rapides Parish (318) 466-6010

KELVIN SPEARS MD

Emergency Medicine

3330 MASONIC DR
ALEXANDRIA, LA 71301

Rapides Parish (800) 639-2519

JOSEPH HATHORN MD

Emergency Medicine

3330 MASONIC DR
ALEXANDRIA, LA 71301

Rapides Parish (800) 639-2519

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 Natalie Alphonse Sullivan's NPI number?

The NPI number for Natalie Alphonse Sullivan is 1003255761. It was assigned to this individual provider in the NPPES registry on June 17, 2013.

Where is Natalie Alphonse Sullivan located?

Natalie Alphonse Sullivan practices at 3330 Masonic Dr, Alexandria, LA 71301. The listed phone number is (318) 448-6917.

What is Natalie Alphonse Sullivan's specialty?

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

Is Natalie Alphonse Sullivan enrolled in Medicare?

Yes. Natalie Alphonse Sullivan 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.

Which organizations bill Medicare for Natalie Alphonse Sullivan's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Natalie Alphonse Sullivan reassigns Medicare benefits to 4 organizations: Nkas MD Consulting (Alexandria, LA), Christus Trinity Clinic Texas (Tyler, TX), 21st Century Oncology LLC (Fort Walton Beach, FL) and Lakeland Regional Health Systems, Inc. (Lakeland, FL). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Natalie Alphonse Sullivan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Natalie Alphonse Sullivan accept?

Health plans from Ambetter Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections, Ambetter from Superior HealthPlan and Ambetter of Alabama and 2 other insurers list Natalie Alphonse Sullivan 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 Natalie Alphonse Sullivan affiliated with any hospitals?

According to CMS data, Natalie Alphonse Sullivan is affiliated with Christus St Frances Cabrini Hospital.

When was this NPI record last updated?

The NPPES record for Natalie Alphonse Sullivan was last updated on February 12, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 months 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.