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JOHN GRAYSON REILLY M.D., M.P.H.
NPI 1841845302
Surgery in Brownsville, TX

Active since August 01, 2019PECOS EnrolledAccepts Medicare Assignment
4770 N EXPRESSWAY STE 305A, BROWNSVILLE, TX 78526(956) 362-3980(956) 362-3979 Get Directions Write a Review

NPPES record last updated: September 18, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Sep 18, 2025, Jun 23, 2025, Aug 1, 2019 (3 updates tracked since 2019).

About John Grayson Reilly M.d., M.p.h. NPPES

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

JOHN GRAYSON REILLY M.D., M.P.H. (NPI 1841845302) is an individual surgery provider in Brownsville, Texas, licensed in Texas (V9702) and active in the NPI registry since August 2019. He is enrolled in Medicare PECOS and is a graduate of Texas A & M University System, Hsc, College Of Medicine (2018).

NPPES Registry Identity

NPI1841845302
Entity TypeIndividualMale
Primary Taxonomy208600000X
Provider Legal NameJOHN GRAYSON REILLYCredential: M.D., M.P.H.
Location Address4770 N EXPRESSWAY STE 305ABrownsville, TX 78526-4165
Mailing AddressPo Box 2975Mcallen, TX 78502-2975 · (956) 362-3980 · Fax (956) 362-3979
Phone(956) 362-3980
Fax(956) 362-3979
Sole ProprietorNo
Medical School CMSTexas A & M University System, Hsc, College Of MedicineGraduated 2018
Enumeration DateAugust 1, 2019
Last NPPES UpdateSeptember 18, 20253 updates tracked since enumeration
NPPES CertifiedSeptember 18, 2025
✔ NPI 1841845302 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySurgeryAllopathic & Osteopathic Physicians
Taxonomy Code208600000X
License✔ Licensed in TX · V9702
Definition
A general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of surgical conditions in the following areas: alimentary tract; abdomen; breast, skin and soft tissue; endocrine system; head and neck surgery; pediatric surgery; surgical critical care; surgical oncology; trauma and burns; and vascular surgery. General surgeons increasingly provide care through the use of minimally invasive and endoscopic techniques. Many general surgeons also possess expertise in transplantation surgery, plastic surgery and cardiothoracic surgery.
4770 N EXPRESSWAY STE 305A, Brownsville, TX 78526
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arizona Complete Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections 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

John Grayson Reilly M.d., M.p.h. 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 ID5092221846
PECOS Enrollment IDI20250719000249
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 John Reilly reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Renaissance Specialty Surgery
47 mi
Surgery
5501 S MCCOLL RD
Edinburg, TX 78539
  • Reassigned Medicare billing, Texas enrollment
  • 27 clinicians in this Medicare group
NPI 1174952907 (956) 362-2171

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 78526 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
$84.92 typical visit price
range $54.84 – $166.88
Typical copayment $21.23 (range $13.71 – $41.72)
Most-billed visit code 99203
Established Patient
$68.55 typical visit price
range $17.52 – $136.11
Typical copayment $17.13 (range $4.38 – $34.02)
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 3

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

DANIEL ALBERTO ROMANELLI MD
Orthopaedic Surgery (Sports Medicine)
4770 N EXPRESSWAY STE 305A
BROWNSVILLE, TX 78526
Cameron County (956) 362-3980
MARTIN LORENZO HOLGUIN JR. PA-C
Physician Assistant
4770 N EXPRESSWAY STE 305A
BROWNSVILLE, TX 78526
Cameron County (956) 362-3980
CHARLES JEFFREY SCHWERTNER M.D.
Orthopaedic Surgery
4770 N EXPRESSWAY STE 305A
BROWNSVILLE, TX 78526
Cameron County (956) 362-3980

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 John Reilly's NPI number?

The NPI number for John Reilly is 1841845302. It was assigned to this individual provider in the NPPES registry on August 1, 2019.

Where is John Reilly located?

John Reilly practices at 4770 N Expressway Ste 305A, Brownsville, TX 78526. The listed phone number is (956) 362-3980.

What is John Reilly's specialty?

The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.

Is John Reilly enrolled in Medicare?

Yes. John Reilly 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 organization bills Medicare for John Reilly's services?

According to the CMS Revalidation Reassignment List (October 2026 release), John Reilly reassigns Medicare benefits to Renaissance Specialty Surgery (Edinburg, TX). 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 John Reilly's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does John Reilly accept?

Health plans from Ambetter from Arizona Complete Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections, Ambetter from Superior HealthPlan and Ambetter of Oklahoma and 1 other insurer list John Reilly 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.

When was this NPI record last updated?

The NPPES record for John Reilly was last updated on September 18, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 months 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.