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DR. GILBERT RAYMOND IRWIN M.D.P.C.
NPI 1588649990
Internal Medicine in Manassas, VA

Active since December 08, 2005PECOS Enrolled
9590 SURVEYOR CT, MANASSAS, VA 20110(703) 361-5116(703) 361-5876 Get Directions Write a Review

NPPES record last updated: December 8, 2016. Verified against the NPPES registry weekly; last sync: November 08, 2026.

About Dr. Gilbert Raymond Irwin M.d.p.c. NPPES

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

DR. GILBERT RAYMOND IRWIN M.D.P.C. (NPI 1588649990) is an individual internal medicine provider in Manassas, Virginia, licensed in Virginia (0101023931) and active in the NPI registry since December 2005. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1588649990
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. GILBERT RAYMOND IRWINCredential: M.D.P.C.
Location Address9590 SURVEYOR CTManassas, VA 20110-4406
Mailing AddressPo Box 60447Charlotte, NC 28260-0447 · (703) 361-5116
Phone(703) 361-5116
Fax(703) 361-5876
Sole ProprietorNo
Enumeration DateDecember 8, 2005
Last NPPES UpdateDecember 8, 2016
✔ NPI 1588649990 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in VA · 0101023931
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Also ListedInternal Medicine · Infectious DiseaseTaxonomy 207RI0200X · License 0101023931 (VA)
9590 SURVEYOR CT, Manassas, VA 20110
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Other Identifiers 4

Medicare UPINB08029VA
Medicare UPINVVC230AVA
Medicaid1588649990VA
Medicaid6052975VA

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Gilbert Raymond Irwin M.d.p.c. 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 Gilbert Irwin reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Nmg Affiliate Practice I, LLC
0.1 mi
Surgery
9001 DIGGES RD, SUITE 204
Manassas, VA 20110
  • Reassigned Medicare billing, Virginia enrollment
  • Medicare enrollment name: Uva Community Health Medical Group LLC
  • 584 clinicians in this Medicare group
NPI 1205103819 (703) 257-9234

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 20110 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
$129.04 typical visit price
range $56.19 – $170.30
Typical copayment $32.26 (range $14.04 – $42.57)
Most-billed visit code 99204
Established Patient
$99.13 typical visit price
range $18.07 – $138.91
Typical copayment $24.78 (range $4.51 – $34.72)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES

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

THOMAS C. DOTSON, M.D.P.C.
Internal Medicine
9590 SURVEYOR CT
MANASSAS, VA 20110
Manassas City (703) 361-5116

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 Gilbert Irwin's NPI number?

The NPI number for Gilbert Irwin is 1588649990. It was assigned to this individual provider in the NPPES registry on December 8, 2005.

Where is Gilbert Irwin located?

Gilbert Irwin practices at 9590 Surveyor Ct, Manassas, VA 20110. The listed phone number is (703) 361-5116.

What is Gilbert Irwin's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Gilbert Irwin enrolled in Medicare?

Yes. Gilbert Irwin is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Gilbert Irwin's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Gilbert Irwin reassigns Medicare benefits to Nmg Affiliate Practice I, LLC (Manassas, VA). 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 Gilbert Irwin's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Gilbert Irwin was last updated on December 8, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.