DR. MARK EWING CHISAM M.D.
NPI 1053381251
Radiology - Radiation Oncology in Williamsburg, VA

Q: What is Mark Chisam's NPI number?

The NPI number for Mark Chisam is 1053381251. It was assigned to this individual provider in the NPPES registry on January 23, 2006.

Q: What is Mark Chisam'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 Mark Chisam was last updated on October 3, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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 January 23, 2006PECOS EnrolledAccepts Medicare Assignment

94.07/100

CMS Quality Rating

3901 TREYBURN DR, SUITE B, WILLIAMSBURG, VA 23185(757) 220-4900(757) 565-5328 Get Directions Write a Review

NPPES record last updated: October 3, 2013. Verified against the NPPES registry weekly; last sync: August 23, 2026.

On this page

About Dr. Mark Ewing Chisam M.d. NPPES

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

DR. MARK EWING CHISAM M.D. (NPI 1053381251) is an individual radiation oncology provider in Williamsburg, Virginia, licensed in Virginia (0101054200) and active in the NPI registry since January 2006. He is enrolled in Medicare PECOS, is affiliated with Riverside Regional Medical Center, and is a graduate of Uniformed Services Uhs Fe Hebert School Of Med (1994).

NPPES Registry Identity

NPI1053381251

Entity TypeIndividualMale

Primary Taxonomy2085R0001X

Provider Legal NameDR. MARK EWING CHISAMCredential: M.D.

Location Address3901 TREYBURN DR, SUITE BWilliamsburg, VA 23185-2891

Mailing Address856 J Clyde Morris Blvd, Suite ANewport News, VA 23601-1318

Phone(757) 220-4900

Fax(757) 565-5328

Sole ProprietorNo

Medical School CMSUniformed Services Uhs Fe Hebert School Of MedGraduated 1994

Enumeration DateJanuary 23, 2006

Last NPPES UpdateOctober 3, 2013

✔ NPI 1053381251 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 VA · 0101054200

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.

3901 TREYBURN DR, Williamsburg, VA 23185

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Other Identifiers 4

Medicare PINVV3839AVA

Medicaid1053381251VA

Medicare UPING32428VA

Medicare PINP00999262VA

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

Dr. Mark Ewing Chisam 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 ID4486758455

PECOS Enrollment IDI20070330000472

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 13

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.

494 services38 patients

Intra-fraction localization and tracking of target or patient motion during delivery of radiation therapy (eg,3d positional tracking, gating, 3d surface tracking), each fraction of treatment G6017

In radiation therapy, intra-fraction localization and tracking monitor patient or target movement during treatment. This ensures that radiation is accurately delivered to the correct area. Techniques like 3D positional tracking, gating, and 3D surface tracking are used to enhance precision.

216 services18 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.

144 services64 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.

143 services60 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.

122 services43 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.

40 services40 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.

37 services27 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.

35 services35 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.

32 services30 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.

24 services20 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.

21 services20 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.

20 services20 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.

18 services18 patients

Hospital Affiliations CMS Care Compare

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

Riverside Regional Medical Center

Acute Care Hospitals · Newport News, VA

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number490052

Location500 J Clyde Morris BlvdNewport News, VA 23601 · Newport News City County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 23185 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

$170.30 typical visit price

range $56.19 – $170.30

Typical copayment $42.57 (range $14.04 – $42.57)

Most-billed visit code 99205

Established Patient

$70.08 typical visit price

range $18.07 – $138.91

Typical copayment $17.52 (range $4.51 – $34.72)

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.

94.07/100

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

Scored through an Alternative Payment Model

Quality

90.65

Promoting Interoperability

95.83

Improvement Activities

Other Providers at the Same Location NPPES 5

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

WILLIAMSBURG RADIATION THERAPY CENTER INC

Clinic/Center (Radiology)

3901 TREYBURN DR, SUITE B
WILLIAMSBURG, VA 23185

York County (757) 220-4900

RIVERSIDE PHYSICIAN SERVICES INC

Family Medicine

3901 TREYBURN DR, SUITE 100
WILLIAMSBURG, VA 23185

York County (757) 220-4751

WILLIAMSBURG FAMIILY PHYSICIANS, INC.

Family Medicine

3901 TREYBURN DR, SUITE 101
WILLIAMSBURG, VA 23185

York County (757) 564-8182

DR. JON ROGER GRAY MD, MPH

Preventive Medicine (Occupational Medicine)

3901 TREYBURN DR
WILLIAMSBURG, VA 23185

York County (757) 772-0192

RIVERSIDE PHYSICIAN SERVICES INC

Radiology (Radiation Oncology)

3901 TREYBURN DR, SUITE B
WILLIAMSBURG, VA 23185

York County (757) 220-4900

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 Mark Chisam's NPI number?

The NPI number for Mark Chisam is 1053381251. It was assigned to this individual provider in the NPPES registry on January 23, 2006.

Where is Mark Chisam located?

Mark Chisam practices at 3901 Treyburn Dr Suite B, Williamsburg, VA 23185. The listed phone number is (757) 220-4900.

What is Mark Chisam's specialty?

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

Is Mark Chisam enrolled in Medicare?

Yes. Mark Chisam 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.

Is Mark Chisam affiliated with any hospitals?

According to CMS data, Mark Chisam is affiliated with Riverside Regional Medical Center.

When was this NPI record last updated?

The NPPES record for Mark Chisam was last updated on October 3, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.