DR. MARK FULLER SEWELL M.D.
NPI 1912913880
Obstetrics & Gynecology - Maternal & Fetal Medicine in Alexandria, VA

Q: What is Mark Sewell's NPI number?

The NPI number for Mark Sewell is 1912913880. It was assigned to this individual provider in the NPPES registry on July 31, 2006.

Q: What is Mark Sewell's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology, specializing in Maternal & Fetal Medicine, with taxonomy code 207VM0101X.

Q: When was this NPI record last updated?

The NPPES record for Mark Sewell was last updated on July 20, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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 July 31, 2006PECOS EnrolledAccepts Medicare Assignment

81.28/100

CMS Quality Rating

4320 SEMINARY RD, ALEXANDRIA, VA 22304(703) 504-3000(703) 504-3388 Get Directions Write a Review

NPPES record last updated: July 20, 2021. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Jul 20, 2021, Oct 21, 2020 (2 updates tracked since 2020).

On this page

About Dr. Mark Fuller Sewell M.d. NPPES

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

DR. MARK FULLER SEWELL M.D. (NPI 1912913880) is an individual maternal & fetal medicine provider in Alexandria, Virginia, licensed in North Carolina (2011-1303) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of Uniformed Services Uhs Fe Hebert School Of Med (1999).

NPPES Registry Identity

NPI1912913880

Entity TypeIndividualMale

Primary Taxonomy207VM0101X

Provider Legal NameDR. MARK FULLER SEWELLCredential: M.D.

Location Address4320 SEMINARY RDAlexandria, VA 22304-1535

Mailing AddressPo Box 37174Baltimore, MD 21297-3174 · (571) 423-5699 · Fax (571) 423-5698

Phone(703) 504-3000

Fax(703) 504-3388

Sole ProprietorNo

Medical School CMSUniformed Services Uhs Fe Hebert School Of MedGraduated 1999

Enumeration DateJuly 31, 2006

Last NPPES UpdateJuly 20, 20212 updates tracked since enumeration

NPPES CertifiedJuly 20, 2021

✔ NPI 1912913880 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyObstetrics & Gynecology · Maternal & Fetal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207VM0101X

Licenses✔ Licensed in NC · 2011-1303✔ Licensed in VA · 0101229824✔ Licensed in OH · 35083035S

Definition

An obstetrician/gynecologist who cares for, or provides consultation on, patients with complications of pregnancy. This specialist has advanced knowledge of the obstetrical, medical and surgical complications of pregnancy and their effect on both the mother and the fetus. The specialist also possesses expertise in the most current diagnostic and treatment modalities used in the care of patients with complicated pregnancies.

Also ListedObstetrics & GynecologyTaxonomy 207V00000X · License 0101229824 (VA)

4320 SEMINARY RD, Alexandria, VA 22304

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Secondary Practice Locations 2

Location 1155 Memorial DrivePinehurst, NC 28374-8159 · Phone (910) 715-2220 · Fax (910) 908-7378

Location 23300 Gallows RdFalls Church, VA 22042-3307 · Phone (703) 776-4001 · Fax (703) 776-7113

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Cigna Healthcare, Moda Health Plan, Inc., 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 and accepts Medicare assignment

Dr. Mark Fuller Sewell 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 ID8224265558

PECOS Enrollment IDI20190509002840, I20190515002413

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 Mark Sewell reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Inova Health Care Services

7.0 mi

Internal Medicine

3300 GALLOWS RD, PHYSICIAN SERVICES
Falls Church, VA 22042

Reassigned Medicare billing, District of Columbia and Virginia enrollments
Also billed through NPI 1588717755 (Virginia)
2,618 clinicians in this Medicare group

NPI 1952320061 (703) 321-2627

Firsthealth Of The Carolinas, Inc.

255 mi

Physical Therapy

2925 BEECHTREE DR STE 145
Sanford, NC 27330

Reassigned Medicare billing, North Carolina enrollment
151 clinicians in this Medicare group

NPI 1245670298 (919) 774-1595

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 22304 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

$147.85 typical visit price

range $65.18 – $194.86

Typical copayment $36.96 (range $16.29 – $48.71)

Most-billed visit code 99204

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.

81.28/100

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

Scored as part of a group practice

Quality

70.77

Promoting Interoperability

100

Improvement Activities

Cost

66.84

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. MADHUSUDANAN SRAMBICKAL RAMASWAMY M.D., M.S.

Internal Medicine (Critical Care Medicine)

4320 SEMINARY RD
ALEXANDRIA, VA 22304

Alexandria City (703) 504-3000

ASSOCIATION OF ALEXANDRIA RADIOLOGISTS, P.C.

Radiology (Diagnostic Radiology)

4320 SEMINARY RD
ALEXANDRIA, VA 22304

Alexandria City (703) 504-3000

DR. MICHAEL ANTHONY HOLLIDAY M.D.

Pediatrics (Neonatal-Perinatal Medicine)

4320 SEMINARY RD, SUITE 3000
ALEXANDRIA, VA 22304

Alexandria City (703) 504-3069

MR. VALENTINE JEAN TOUSSAINT NILES CRNA

Nurse Anesthetist, Certified Registered

4320 SEMINARY RD
ALEXANDRIA, VA 22304

Alexandria City (703) 504-3521

MR. RODOLFO AMA ALORA JR. PT

Physical Therapist

4320 SEMINARY RD
ALEXANDRIA, VA 22304

Alexandria City (703) 504-3167

ABDUL RAHMAN M.D

Internal Medicine (Critical Care Medicine)

4320 SEMINARY RD
ALEXANDRIA, VA 22304

Alexandria City (703) 504-3000

LIANA E MATEVOSIAN NP

Nurse Practitioner

4320 SEMINARY RD
ALEXANDRIA, VA 22304

Alexandria City (703) 504-3000

DR. BROOKE LANELL GRAY D.O.

Internal Medicine (Critical Care Medicine)

4320 SEMINARY RD
ALEXANDRIA, VA 22304

Alexandria City (703) 504-3000

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 Sewell's NPI number?

The NPI number for Mark Sewell is 1912913880. It was assigned to this individual provider in the NPPES registry on July 31, 2006.

Where is Mark Sewell located?

Mark Sewell practices at 4320 Seminary Rd, Alexandria, VA 22304. The listed phone number is (703) 504-3000.

What is Mark Sewell's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology, specializing in Maternal & Fetal Medicine, with taxonomy code 207VM0101X.

Is Mark Sewell enrolled in Medicare?

Yes. Mark Sewell 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 Mark Sewell's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mark Sewell reassigns Medicare benefits to 2 organizations: Inova Health Care Services (Falls Church, VA) and Firsthealth Of The Carolinas, Inc. (Sanford, NC). 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 Mark Sewell's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Mark Sewell accept?

Health plans from Cigna Healthcare, Moda Health Plan, Inc. and Oscar Health list Mark Sewell 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 Mark Sewell was last updated on July 20, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.