Robert John Postlethwaite, MD

Primary specialty

Gastroenterology PhysicianTaxonomy code 207RG0100X

License

0101289327 Issued in VA

Practice address

3028 Javier Rd Ste 300
Fairfax, VA 22031-4622

Phone

(703) 698-8960

Fax

(703) 828-0961

NPI assigned

Mar 24, 2020

Last updated

Jun 30, 2026By the provider in NPPES

Sex

Male

Sole proprietor

No

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 1

Addresses

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Specialty

Gastroenterology

Education

University of South Florida College of Medicine, 2020

Medicare assignment

May accept Medicare assignment

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

Interoperability endpoints

• Direct secure messaging: rpostlethwaite110579@direct.phhs.org

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1585008000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1782777600000",
    "number": "1457988255",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "3028 JAVIER RD STE 300",
            "city": "FAIRFAX",
            "state": "VA",
            "postal_code": "220314622",
            "telephone_number": "703-698-8960",
            "fax_number": "703-828-0961"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "3028 JAVIER RD STE 300",
            "city": "FAIRFAX",
            "state": "VA",
            "postal_code": "220314622",
            "telephone_number": "703-698-8960",
            "fax_number": "703-828-0961"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "3700 Joseph Siewick Dr Ste 308",
            "address_purpose": "LOCATION",
            "city": "Fairfax",
            "state": "VA",
            "postal_code": "220331739",
            "country_code": "US",
            "telephone_number": "703-716-8700",
            "fax_number": "703-716-8703",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "POSTLETHWAITE",
        "first_name": "ROBERT",
        "middle_name": "JOHN",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2020-03-24",
        "last_updated": "2026-06-30",
        "certification_date": "2026-06-30",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RG0100X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Gastroenterology",
            "state": "VA",
            "license": "0101289327",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Monika A Porter
• Terrie Porter, PA-C
• Beatriz Portillo
• Erika Lanette Portillo, M.ED, LMHP-R
• Vicki Portley, P.T.
• Jennifer McNamara Poston, PHD
• Abby Potash, MSS, LSW
• Barry Potoker
• Potomac Ambulatory Surgery Center
• Tamika Potts

• Gastroenterology Physician in Fairfax, VA
• Providers in Fairfax, VA by specialty
• Gastroenterology Physician in Virginia

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 30, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.