MARY LOUISE SEBASTIAN M.D.
NPI 1124054457
Surgery in Arlington, VA

Q: What is Mary Sebastian's NPI number?

The NPI number for Mary Sebastian is 1124054457. It was assigned to this individual provider in the NPPES registry on June 26, 2006.

Q: What is Mary Sebastian's specialty?

The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.

Q: When was this NPI record last updated?

The NPPES record for Mary Sebastian was last updated on February 23, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.

Active since June 26, 2006PECOS EnrolledAccepts Medicare Assignment

77.36/100

CMS Quality Rating

1851 N GEORGE MASON DR STE 5D, ARLINGTON, VA 22207(703) 717-4217(703) 717-4218 Get Directions Write a Review

NPPES record last updated: February 23, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

On this page

About Mary Louise Sebastian M.d. NPPES

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

MARY LOUISE SEBASTIAN M.D. (NPI 1124054457) is an individual surgery provider in Arlington, Virginia, licensed in Virginia (0101233396) and active in the NPI registry since June 2006. She is enrolled in Medicare PECOS, is affiliated with Virginia Hospital Center, and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1124054457

Entity TypeIndividualFemale

Primary Taxonomy208600000X

Provider Legal NameMARY LOUISE SEBASTIANCredential: M.D.

Location Address1851 N GEORGE MASON DR STE 5DArlington, VA 22207-1953

Mailing Address1851 N George Mason Dr Ste 5dArlington, VA 22207-1953 · (703) 717-4217 · Fax (703) 717-4218

Phone(703) 717-4217

Fax(703) 717-4218

Sole ProprietorNo

Medical School CMSUniversity Of Virginia School Of MedicineGraduated 2000

Enumeration DateJune 26, 2006

Last NPPES UpdateFebruary 23, 2026

NPPES CertifiedFebruary 23, 2026

✔ NPI 1124054457 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySurgeryAllopathic & Osteopathic Physicians

Taxonomy Code208600000X

License✔ Licensed in VA · 0101233396

Definition

A general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of surgical conditions in the following areas: alimentary tract; abdomen; breast, skin and soft tissue; endocrine system; head and neck surgery; pediatric surgery; surgical critical care; surgical oncology; trauma and burns; and vascular surgery. General surgeons increasingly provide care through the use of minimally invasive and endoscopic techniques. Many general surgeons also possess expertise in transplantation surgery, plastic surgery and cardiothoracic surgery.

1851 N GEORGE MASON DR STE 5D, Arlington, VA 22207

Open in Google Maps ↗

Secondary Practice Locations 2

Location 11760 Old Meadow Rd Ste 210Mc Lean, VA 22102-4330 · Phone (703) 717-7775 · Fax (703) 717-4218

Location 21625 N George Mason Dr Ste 315Arlington, VA 22205-3690 · Phone (703) 717-4217 · Fax (703) 717-4218

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

Mary Louise Sebastian 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 ID7214935295

PECOS Enrollment IDI20081215000244

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 12

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.

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.

78 services73 patients

Limited ultrasound scan of 1 breast 76642

A limited ultrasound scan of one breast is a non-invasive imaging test. It uses sound waves to create pictures of the inside of your breast. It helps identify any unusual growths or changes. It's safe, quick, and typically painless.

45 services42 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.

45 services37 patients

Partial removal of breast 19301

A partial removal of the breast, also known as a lumpectomy, involves taking out a portion of the breast tissue to eliminate concerning cells. It's typically performed when the problem area is limited in size. This procedure helps to preserve most of the breast's appearance while aiming to remove all the unhealthy cells.

31 services24 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.

29 services29 patients

Radiofrequency spectroscopy evaluation of surgical margins during partial mastectomy, with report 0546T

This procedure uses radiofrequency spectroscopy to assess the area around a removed mass during a partial mastectomy. It helps ensure no abnormal tissue is left behind. A detailed report of the findings is provided afterwards.

23 services23 patients

Biopsy or removal of deep lymph nodes of underarm 38525

A biopsy or removal of deep underarm lymph nodes is a procedure where a small sample of lymph node tissue is taken for testing. This helps in diagnosing or ruling out conditions like infections or cancers. It involves a small incision and is typically done under local or general anesthesia.

22 services21 patients

Imaging of lymph nodes during surgery 38900

Imaging of lymph nodes during surgery involves taking detailed pictures of your lymph nodes to help surgeons see and assess them in real-time. This procedure can aid in detecting disease, guiding treatment, and improving surgical precision.

22 services21 patients

Repair of wound by transferring skin, 30.1-60.0 sq cm 14301

This procedure involves repairing a wound by moving healthy skin from one area of the body to the wound site. The transferred skin, measuring between 30.1-60.0 square cm, aids in healing and reduces scarring.

20 services16 patients

Prolonged office or other outpatient evaluation and management service(s) beyond the maximum required time of the primary procedure which has been selected using total time on the date of the primary service; each additional 15 minutes by the physician or G2212

This service refers to extended doctor visits where your healthcare provider spends additional time evaluating and managing your health beyond the primary procedure's required time. This includes each extra 15 minutes spent by the physician on the same day as the primary service.

20 services17 patients

Placement of locating device in breast using ultrasound guidance, first growth 19285

This procedure involves inserting a small locating device into the breast tissue using ultrasound. The device helps accurately mark the position of the first growth. This aids in precise treatment planning. It's a non-invasive process with minimal discomfort.

17 services17 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.

14 services14 patients

Hospital Affiliations CMS Care Compare

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

Virginia Hospital Center

Acute Care Hospitals · Arlington, VA

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number490050

Location1701 North George Mason DriveArlington, VA 22205 · Arlington County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 22207 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

$100.31 typical visit price

range $65.18 – $194.86

Typical copayment $25.07 (range $16.29 – $48.71)

Most-billed visit code 99203

Established Patient

$80.66 typical visit price

range $21.40 – $158.88

Typical copayment $20.16 (range $5.35 – $39.72)

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.

77.36/100

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

Scored as part of a group practice

Quality

80.82

Promoting Interoperability

Improvement Activities

Cost

54.56

Leave this field empty

Other Providers at the Same Location NPPES 2

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

ALISON REBECCA GOLDENBERG MD.

Surgery

1851 N GEORGE MASON DR STE 5D
ARLINGTON, VA 22207

Arlington County (703) 717-4217

VIRGINIA HOSPITAL CENTER PHYSICIAN GROUP, LLC

Surgery

1851 N GEORGE MASON DR STE 5D
ARLINGTON, VA 22207

Arlington County (703) 717-4217

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 Mary Sebastian's NPI number?

The NPI number for Mary Sebastian is 1124054457. It was assigned to this individual provider in the NPPES registry on June 26, 2006.

Where is Mary Sebastian located?

Mary Sebastian practices at 1851 N George Mason Dr Ste 5D, Arlington, VA 22207. The listed phone number is (703) 717-4217.

What is Mary Sebastian's specialty?

The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.

Is Mary Sebastian enrolled in Medicare?

Yes. Mary Sebastian 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 Mary Sebastian affiliated with any hospitals?

According to CMS data, Mary Sebastian is affiliated with Virginia Hospital Center.

When was this NPI record last updated?

The NPPES record for Mary Sebastian was last updated on February 23, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.