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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

MARIO ANDRES CASALLAS
NPI 1285399246
Physician Assistant in Hampton, VA

Active since November 04, 2021PECOS Enrolled
77 NEALY AVE, HAMPTON, VA 23665(757) 764-8050 Get Directions Write a Review

NPPES record last updated: August 4, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Aug 4, 2026, Nov 4, 2021 (2 updates tracked since 2021).

About Mario Andres Casallas NPPES

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

MARIO ANDRES CASALLAS (NPI 1285399246) is an individual physician assistant in Hampton, Virginia and active in the NPI registry since November 2021. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1285399246
Entity TypeIndividualMale
Primary Taxonomy363A00000X
Provider Legal NameMARIO ANDRES CASALLAS
Location Address77 NEALY AVEHampton, VA 23665-2040
Mailing Address77 Nealy AveHampton, VA 23665-2040
Phone(757) 764-8050
Sole ProprietorYes
Enumeration DateNovember 4, 2021
Last NPPES UpdateAugust 4, 20262 updates tracked since enumeration
NPPES CertifiedAugust 4, 2026
✔ NPI 1285399246 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPhysician AssistantPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363A00000X
Definition
A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.
77 NEALY AVE, Hampton, VA 23665
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Mario Andres Casallas 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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 23665 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
$86.88 typical visit price
range $56.19 – $170.30
Typical copayment $21.72 (range $14.04 – $42.57)
Most-billed visit code 99203
Established Patient
$70.08 typical visit price
range $18.07 – $138.91
Typical copayment $17.52 (range $4.51 – $34.72)
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 20

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

JEFFREY LYNN BARBOUR RN
Registered Nurse
77 NEALY AVE
LANGLEY AFB, VA 23665
Hampton City (800) 872-8626
DR. CHRISTOPHER JOHN M.D.
Anesthesiology
77 NEALY AVE
HAMPTON, VA 23665
Hampton City (757) 764-0856
DR. IAN CHRISTOPHER CARPENTER PSY.D.
Psychologist (Clinical)
77 NEALY AVE
LANGLEY AFB, VA 23665
Hampton City (757) 225-1152
DR. VERONICA ALIX
Allergy & Immunology
77 NEALY AVE
HAMPTON, VA 23665
Hampton City (757) 225-7630
COREY LEE CZAJKA IDMT
Military Health Care Provider (Independent Duty Medical Technicians)
77 NEALY AVE
LANGLEY AFB, VA 23665
Hampton City (757) 764-6800
IRIS H BAKER RN
Registered Nurse
77 NEALY AVE
HAMPTON, VA 23665
Hampton City (757) 225-2310
RYAN PETER CARFI DO
Internal Medicine
77 NEALY AVE
HAMPTON, VA 23665
Hampton City (757) 764-2523
BRANDI M BRINKMAN
Physical Therapist
77 NEALY AVE
HAMPTON, VA 23665
Hampton City (757) 764-6963

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 Mario Casallas's NPI number?

The NPI number for Mario Casallas is 1285399246. It was assigned to this individual provider in the NPPES registry on November 4, 2021.

Where is Mario Casallas located?

Mario Casallas practices at 77 Nealy Ave, Hampton, VA 23665. The listed phone number is (757) 764-8050.

What is Mario Casallas's specialty?

The primary specialty registered for this NPI is Physician Assistant with taxonomy code 363A00000X.

Is Mario Casallas enrolled in Medicare?

Yes. Mario Casallas is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Mario Casallas was last updated on August 4, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 days 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.