ROBERT JOHN POSTLETHWAITE MD
NPI 1457988255
Internal Medicine - Gastroenterology in Fairfax, VA

Q: What is Robert Postlethwaite's NPI number?

The NPI number for Robert Postlethwaite is 1457988255. It was assigned to this individual provider in the NPPES registry on March 24, 2020.

Q: What is Robert Postlethwaite's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Active since March 24, 2020PECOS Enrolled

3028 JAVIER RD STE 300, FAIRFAX, VA 22031(703) 698-8960(703) 828-0961 Get Directions Write a Review

NPPES record last updated: June 30, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

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About Robert John Postlethwaite Md NPPES

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

ROBERT JOHN POSTLETHWAITE MD (NPI 1457988255) is an individual gastroenterology provider in Fairfax, Virginia, licensed in Virginia (0101289327) and active in the NPI registry since March 2020. He is enrolled in Medicare PECOS, maintains a secondary practice location in Fairfax, and is a graduate of University Of South Florida College Of Medicine (2020).

NPPES Registry Identity

NPI1457988255

Entity TypeIndividualMale

Primary Taxonomy207RG0100X

Provider Legal NameROBERT JOHN POSTLETHWAITECredential: MD

Location Address3028 JAVIER RD STE 300Fairfax, VA 22031-4622

Mailing Address3028 Javier Rd Ste 300Fairfax, VA 22031-4622 · (703) 698-8960 · Fax (703) 828-0961

Phone(703) 698-8960

Fax(703) 828-0961

Sole ProprietorNo

Medical School CMSUniversity Of South Florida College Of MedicineGraduated 2020

Enumeration DateMarch 24, 2020

Last NPPES UpdateJune 30, 2026

NPPES CertifiedJune 30, 2026

✔ NPI 1457988255 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians

Taxonomy Code207RG0100X

License✔ Licensed in VA · 0101289327

Definition

An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.

3028 JAVIER RD STE 300, Fairfax, VA 22031

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Secondary Practice Location 1

Location 13700 Joseph Siewick Dr Ste 308Fairfax, VA 22033-1739 · Phone (703) 716-8700 · Fax (703) 716-8703

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Robert John Postlethwaite Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID8527427863

PECOS Enrollment IDI20260723003102

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 Robert Postlethwaite reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Gastroenterology Associates Of Northern Virginia, LLC

8.0 mi

Gastroenterology

3700 JOSEPH SIEWICK DR., SUITE 308
Fairfax, VA 22033

Reassigned Medicare billing, District of Columbia and Virginia enrollments
110 clinicians in this Medicare group

NPI 1205884368 (703) 716-8700

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 22031 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

$113.72 typical visit price

range $21.40 – $158.88

Typical copayment $28.43 (range $5.35 – $39.72)

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 10

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

GASTROENTEROLOGY ASSOCIATES OF NORTHERN VIRGINIA, LLC

Internal Medicine (Gastroenterology)