GRACE MARIE TEWKESBURY MD
NPI 1447719778
Radiology - Diagnostic Radiology in Arlington, VA

NPI Status: Active since March 16, 2019

Contact Information

1701 N GEORGE MASON DR
ARLINGTON, VA
ZIP 22205
Phone: (703) 558-6730

NPI Profile Information
Primary Taxonomy
Medicare Participation & PECOS Status
Physician Visit Costs
NPI Validation
Other Providers Same Location
Frequently Asked Questions

Individual
Female
Radiology
Diagnostic Radiology
PECOS Enrolled

About GRACE TEWKESBURY

This page provides the complete NPI Profile along with additional information for Grace Tewkesbury, a provider established in Arlington, Virginia with a medical specialization in Radiology, focusing in diagnostic radiology . The healthcare provider is registered in the NPI registry with number 1447719778 assigned on March 2019. The practitioner's primary taxonomy code is 2085R0202X with license number 0101285641 (VA). The provider is registered as an individual and her NPI record was last updated April 2025.

NPI: 1447719778
Provider Name: GRACE MARIE TEWKESBURY MD
Gender: Female
Entity Type: Individual
Location Address: 1701 N GEORGE MASON DR ARLINGTON, VA 22205
Location Phone: (703) 558-6730
Mailing Address: 1701 N GEORGE MASON DR ARLINGTON, VA 22205
Mailing Phone: (703) 558-6730
Is Sole Proprietor?: No
Enumeration Date: 03-16-2019
Last Update Date: 04-06-2025
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Location Map

Specialty - Primary Taxonomy

The NPI enumerator requires providers to submit at least one taxonomy code. A taxonomy code is a unique 10-character code that describes the healthcare provider type, classification, and the area of specialization. There could be only one primary taxonomy code per NPI record. For individual NPIs the license data is associated to the taxonomy code.

Classification: Radiology Diagnostic Radiology
Taxonomy Code: 2085R0202X
Type: Allopathic & Osteopathic Physicians
License No.: 0101285641
License State: VA
Taxonomy Description: A radiologist who utilizes x-ray, radionuclides, ultrasound and electromagnetic radiation to diagnose and treat disease.

Medicare Participation & PECOS Enrollment Status

Grace Tewkesbury is enrolled in PECOS and is eligible to order or refer health care services for Medicare patients. The provider is eligible to order or refer: Part B Clinical Laboratory and Imaging, Durable Medical Equipment (DME), a Home Health Agency (HHA) and Power Mobility Devices.

What is PECOS?
PECOS is the online Medicare enrollment management system or Provider, Enrollment, Chain and Ownership System. The PECOS system is a database of providers who have registered with CMS as providers or suppliers. PECOS is the primary source of information about verified Medicare professionals. Providers that want to participate in this program need to enroll in PECOS with their NPI number to avoid denied claims.

Is the provider registered in PECOS? Yes
Eligible to Order or Refer Part B Clinical Laboratory and Imaging: Yes
Eligible to Order or Refer Durable Medical Equipment (DMEPOS): Yes
Eligible to Order or Refer a Home Health Agency (HHA): Yes
Eligible to Order or Refer Power Mobility Devices: Yes

Physician Visit Costs

The pricing information below displays the copayment minimum, maximum and average amount that patients under Medicare are charged when visiting this provider as a new or established patient. Please keep in mind that these prices are just for reference purposes, and the actual prices charged by the provider might be different.

For patients covered under private health plans the prices below are also useful as healthcare pricing for private insurance is usually established as a function of Medicare prices. Private insurance covered patients should check their individual plans to determine the exact pricing.

The prices below reflect the costs for new and established patients in the 22205 ZIP code area.

New Patients Visit Costs *

The most utilized procedure code for new patients office visits is 99203

Average New Patient Price $100.31
Minimum New Patient Price $65.18
Maximum New Patient Price $194.86

Average New Patient Copayment $25.07
Minimum New Patient Copayment $16.29
Maximum New Patient Copayment $48.71

Established Patients Visit Costs *

The most utilized procedure code for established patients office visits is 99213

Average Established Patient Price $80.66
Minimum Established Patient Price $21.4
Maximum Established Patient Price $158.88

Average Established Patient Copayment $20.16
Minimum Established Patient Copayment $5.35
Maximum Established Patient Copayment $39.72

* The physician office visit costs information is generated by statistical analysis of similar providers in the same geographical area. The pricing information above IS NOT the amount charged by this provider.

NPI Validation Check Digit Calculation

The following table explains the step by step NPI number validation process using the ISO standard Luhn algorithm.

Start with the original NPI number, the last digit is the check digit and is not used in the calculation.
1	4	4	7	7	1	9	7	7	8
Step 1: Double the value of the alternate digits, beginning with the rightmost digit.
2	4	8	7	14	1	18	7	14
Step 2: Add all the doubled and unaffected individual digits from step 1 plus the constant number 24.
2 + 4 + 8 + 7 + 1 + 4 + 1 + 1 + 8 + 7 + 1 + 4 + 24 = 72
Step 3: Subtract the total obtained in step 2 from the next higher number ending in zero, the result is the check digit.
80 - 72 = 8									8

The NPI number 1447719778 is valid because the calculated check digit 8 using the Luhn validation algorithm matches the last digit of the original NPI number.

Other Providers at the Same Location

The following 20 providers are registered at the same or nearby location.

DR. DERICK ANTHONY HANLAN M.D

Radiology

(Radiation Oncology)

1701 N GEORGE MASON DR
RADIATION ONCOLOGY DEPT
ARLINGTON, VA
ZIP 22205

About GRACE TEWKESBURY

Location Map

Specialty - Primary Taxonomy

Radiology Diagnostic Radiology

Medicare Participation & PECOS Enrollment Status

Is the provider registered in PECOS? Yes

Eligible to Order or Refer Part B Clinical Laboratory and Imaging: Yes

Eligible to Order or Refer Durable Medical Equipment (DMEPOS): Yes

Eligible to Order or Refer a Home Health Agency (HHA): Yes

Eligible to Order or Refer Power Mobility Devices: Yes

Physician Visit Costs

New Patients Visit Costs *

Established Patients Visit Costs *

Reviews for GRACE MARIE TEWKESBURY MD

NPI Validation Check Digit Calculation

Other Providers at the Same Location

Frequently Asked Questions

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