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ROBERT KNOX M.D.
NPI 1023005915
Surgery - Vascular Surgery in Silver Spring, MD

Active since October 05, 2005PECOS EnrolledAccepts Medicare Assignment
1400 FOREST GLEN RD STE 330, SILVER SPRING, MD 20910(301) 905-3600(301) 905-3601 Get Directions Write a Review

NPPES record last updated: June 28, 2021. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jun 28, 2021, Jun 1, 2021 (2 updates tracked since 2021).

About Robert Knox M.d. NPPES

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

ROBERT KNOX M.D. (NPI 1023005915) is an individual vascular surgery provider in Silver Spring, Maryland, licensed in Maryland (D0058600) and active in the NPI registry since October 2005. He is enrolled in Medicare PECOS, is affiliated with Luminis Health Doctors Community Medical Ctr, Inc, and is a graduate of Columbia University College Of Physicians And Surgeons (1990).

NPPES Registry Identity

NPI1023005915
Entity TypeIndividualMale
Primary Taxonomy2086S0129X
Provider Legal NameROBERT KNOXCredential: M.D.
Location Address1400 FOREST GLEN RD STE 330Silver Spring, MD 20910-1459
Mailing Address1400 Forest Glen Rd Ste 330Silver Spring, MD 20910-1459 · (301) 905-3600 · Fax (301) 905-3601
Phone(301) 905-3600
Fax(301) 905-3601
Sole ProprietorNo
Medical School CMSColumbia University College Of Physicians And SurgeonsGraduated 1990
Enumeration DateOctober 5, 2005
Last NPPES UpdateJune 28, 20212 updates tracked since enumeration
NPPES CertifiedJune 28, 2021
✔ NPI 1023005915 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySurgery · Vascular SurgeryAllopathic & Osteopathic Physicians
Taxonomy Code2086S0129X
License✔ Licensed in MD · D0058600
Definition
A surgeon with expertise in the management of surgical disorders of the blood vessels, excluding the intracranial vessels or the heart.
1400 FOREST GLEN RD STE 330, Silver Spring, MD 20910
Open in Google Maps ↗

Other Identifiers 1

Medicaid403587900MD

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arkansas Health & Wellness, Ambetter Health, Ambetter of Alabama and more.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

Robert Knox 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 ID3870632060
PECOS Enrollment IDI20091201000422, I20240930002001
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

2

Medicare enrollment records show Robert Knox reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Luminis Health Medical Group, LLC
8.5 mi
Maternal & Fetal Medicine
7501 GREENWAY CENTER DR STE 910
Greenbelt, MD 20770
  • Reassigned Medicare billing, District of Columbia enrollment
  • 336 clinicians in this Medicare group
NPI 1467312447 (410) 224-4442
West Tennessee Medical Group Inc
690 mi
Internal Medicine
620 SKYLINE DR
Jackson, TN 38301
  • Reassigned Medicare billing, Tennessee enrollment
  • 242 clinicians in this Medicare group
NPI 1053615955 (731) 660-8730

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

Hospital Affiliations CMS Care Compare

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

Luminis Health Doctors Community Medical Ctr, Inc

Acute Care Hospitals · Lanham, MD
2/5 CMS rating
OwnershipProprietary
CMS Certification Number210051
Location8118 Good Luck RoadLanham, MD 20706 · Prince Georges County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 20910 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.

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.

DR. MATTHEW LEE DONG MD, MPH
Surgery
1400 FOREST GLEN RD STE 330
SILVER SPRING, MD 20910
Montgomery County (301) 905-3535
KAISER FOUNDATION HEALTH PLAN OF THE MID ATLANTIC STATES, INC
Health Maintenance Organization
1400 FOREST GLEN RD STE 330
SILVER SPRING, MD 20910
Montgomery County (301) 905-3500

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 Robert Knox's NPI number?

The NPI number for Robert Knox is 1023005915. It was assigned to this individual provider in the NPPES registry on October 5, 2005.

Where is Robert Knox located?

Robert Knox practices at 1400 Forest Glen Rd Ste 330, Silver Spring, MD 20910. The listed phone number is (301) 905-3600.

What is Robert Knox's specialty?

The primary specialty registered for this NPI is Surgery, specializing in Vascular Surgery, with taxonomy code 2086S0129X.

Is Robert Knox enrolled in Medicare?

Yes. Robert Knox 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 Robert Knox's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Robert Knox reassigns Medicare benefits to 2 organizations: Luminis Health Medical Group, LLC (Greenbelt, MD) and West Tennessee Medical Group Inc (Jackson, TN). 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 Robert Knox's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Robert Knox accept?

Health plans from Ambetter Health, Ambetter from Arkansas Health & Wellness, Ambetter of Alabama, Ambetter of North Carolina and Ambetter of Tennessee and 3 other insurers list Robert Knox 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.

Is Robert Knox affiliated with any hospitals?

According to CMS data, Robert Knox is affiliated with Luminis Health Doctors Community Medical Ctr, Inc.

When was this NPI record last updated?

The NPPES record for Robert Knox was last updated on June 28, 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.