DR. W. HAMILTON WILLIAMS III M.D.
NPI 1407846561
Radiology - Radiation Oncology in Atlanta, GA

Q: What is W. Williams's NPI number?

The NPI number for W. Williams is 1407846561. It was assigned to this individual provider in the NPPES registry on October 28, 2005.

Q: What is W. Williams'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 W. Williams was last updated on August 11, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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 October 28, 2005PECOS Enrolled

69.45/100

CMS Quality Rating

1000 JOHNSON FERRY RD NE, ATLANTA, GA 30342(404) 851-8850(404) 851-6010 Get Directions Write a Review

NPPES record last updated: August 11, 2011. Verified against the NPPES registry weekly; last sync: October 25, 2026.

On this page

About Dr. W. Hamilton Williams Iii M.d. NPPES

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

DR. W. HAMILTON WILLIAMS III M.D. (NPI 1407846561) is an individual radiation oncology provider in Atlanta, Georgia, licensed in Georgia (036041) and active in the NPI registry since October 2005. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1407846561

Entity TypeIndividualMale

Primary Taxonomy2085R0001X

Provider Legal NameDR. W. HAMILTON WILLIAMS IIICredential: M.D.

Location Address1000 JOHNSON FERRY RD NEAtlanta, GA 30342-1606

Mailing Address2864 Johnson Ferry Rd, Suite 150Marietta, GA 30062-5635 · (770) 693-6022 · Fax (770) 693-6039

Phone(404) 851-8850

Fax(404) 851-6010

Sole ProprietorNo

Enumeration DateOctober 28, 2005

Last NPPES UpdateAugust 11, 2011

✔ NPI 1407846561 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyRadiology · Radiation OncologyAllopathic & Osteopathic Physicians

Taxonomy Code2085R0001X

License✔ Licensed in GA · 036041

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.

1000 JOHNSON FERRY RD NE, Atlanta, GA 30342

Open in Google Maps ↗

Other Identifiers 8

Medicaid461790349GGA

Other92BBGCFGA · Medicare

Medicaid461790349EGA

Medicare PIN92BBFXWGA

Medicaid461790349DGA

Medicaid461790349FGA

Medicaid00508659CGA

Medicare UPINF35293GA

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Oscar Health.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. W. Hamilton Williams Iii M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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 Reassignment

Medicare enrollment records show W. Williams reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Radiation Oncology Of Atlanta, LLC

Same address

Radiation Oncology

1000 JOHNSON FERRY RD, NE, NORTHSIDE RADIATION ONCOLOGY DEPARTMENT
Atlanta, GA 30342

Reassigned Medicare billing, Georgia enrollment

NPI 1528049087 (404) 851-8850

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 20

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.

2,265 services84 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.

481 services95 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.

417 services99 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.

203 services94 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.

145 services84 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.

138 services17 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.

123 services123 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.

108 services98 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.

94 services85 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.

82 services78 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.

48 services47 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.

46 services43 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.

39 services33 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 services29 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.

28 services18 patients

Diagnostic exam of voice box using a flexible endoscope 31575

This procedure involves a doctor examining your voice box using a flexible endoscope, a thin tube with a light and camera. It's inserted through your nose or mouth to visualize your throat area. It helps detect any abnormalities in your voice box, ensuring optimal vocal health.

24 services12 patients

Complex radiation therapy planning for delivery of internal radiation 77318

Complex radiation therapy planning for internal radiation involves designing a unique plan to target harmful cells within your body. This process uses advanced imaging technology to map out the precise treatment area, ensuring that healthy tissue is spared.

22 services21 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.

21 services21 patients

Ultrasonic guidance for administration of radiation therapy 76965

Ultrasonic guidance for radiation therapy is a technique that uses ultrasound images to accurately target the area requiring treatment. It helps ensure radiation is directed precisely, reducing harm to healthy tissues.

18 services18 patients

Complex application of radiation source 77778

Complex application of radiation source is a medical procedure used in cancer treatment. It involves the careful placement of radioactive materials in or near the tumor. This helps to destroy cancer cells while minimizing damage to healthy tissues. It's a precise and targeted approach.

18 services18 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 30342 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

$172.43 typical visit price

range $56.84 – $172.43

Typical copayment $43.10 (range $14.21 – $43.10)

Most-billed visit code 99205

Established Patient

$70.85 typical visit price

range $18.22 – $140.40

Typical copayment $17.71 (range $4.55 – $35.10)

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.

69.45/100

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

Individually scored

Quality

62.98

Improvement Activities

Cost

47.54

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.

HANNAH L STEELE CRNA

Nurse Anesthetist, Certified Registered

1000 JOHNSON FERRY RD NE
ATLANTA, GA 30342

Fulton County (770) 645-9181

VALERIE S WEBB NP

Nurse Practitioner (Women's Health)

1000 JOHNSON FERRY RD NE
ATLANTA, GA 30342

Fulton County (770) 645-9181

AMAR R HERNDON

Anesthesiologist Assistant

1000 JOHNSON FERRY RD NE
ATLANTA, GA 30342

Fulton County (770) 645-9181

MISHANA L. MOGELNICKI PAAA

Anesthesiologist Assistant

1000 JOHNSON FERRY RD NE
ATLANTA, GA 30342

Fulton County (770) 645-9181

SUSAN C. OSGOOD CRNA

Nurse Anesthetist, Certified Registered

1000 JOHNSON FERRY RD NE
ATLANTA, GA 30342

Fulton County (770) 645-9181

MRS. KIMBERLY CHILDRES WILLIAMS RPH

Pharmacist

1000 JOHNSON FERRY RD NE
ATLANTA, GA 30342

Fulton County (404) 851-8123

MS. PATRICIA BOATRIGHT GILLEY RPH

Pharmacist

1000 JOHNSON FERRY RD NE, NORTHSIDE HOSPITAL PHARMACY
ATLANTA, GA 30342

Fulton County (404) 851-8908

AMY J FIGUEROA MD

Radiology (Diagnostic Radiology)

1000 JOHNSON FERRY RD NE
ATLANTA, GA 30342

Fulton County (404) 851-8000

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 W. Williams's NPI number?

The NPI number for W. Williams is 1407846561. It was assigned to this individual provider in the NPPES registry on October 28, 2005.

Where is W. Williams located?

W. Williams practices at 1000 Johnson Ferry Rd NE, Atlanta, GA 30342. The listed phone number is (404) 851-8850.

What is W. Williams's specialty?

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

Is W. Williams enrolled in Medicare?

Yes. W. Williams is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for W. Williams's services?

According to the CMS Revalidation Reassignment List (October 2026 release), W. Williams reassigns Medicare benefits to Radiation Oncology Of Atlanta, LLC (Atlanta, GA). The 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 W. Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does W. Williams accept?

Health plans from Oscar Health list W. Williams 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.

When was this NPI record last updated?

The NPPES record for W. Williams was last updated on August 11, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.