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Allergy/Immunology

Gregg M. Santilli, MD

Sees patients in Denison, TX · Texas

Summary

Gregg M. Santilli, MD (Allergy/Immunology) is enrolled with Medicare at 1 practice location in Denison, TX. NPI 1023099082. Medicare data says the clinician accepts Medicare assignment. Source: CMS National Downloadable File, updated 2026-10-02.

Call(903) 463‑8400 NPI Registry record Medicare profile

From official Medicare data

This page shows what Medicare's official clinician data says about Gregg M. Santilli, joined by NPI number (data updated 2026-10-02). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

At a glance

1Practice location
Allergy/ImmunologyPrimary specialty
YesAccepts Medicare assignment
YesOffers telehealth
37Years since medical school (graduated 1989)
Ohio State University College Of MedicineMedical school
MaleGender (as listed)
John Allen Van Wagoner, MD, PAGroup practice

Quick answers

Where does Gregg M. Santilli see patients?
Medicare's clinician data lists 1 practice location in Denison, TX. Call before your visit to confirm the address.
What is Gregg M. Santilli's specialty?
Medicare lists Allergy/Immunology as the primary specialty.
Does Gregg M. Santilli accept Medicare assignment?
Yes. Medicare's clinician data says Gregg M. Santilli accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
Does Gregg M. Santilli offer telehealth?
Medicare's clinician data says Gregg M. Santilli offers telehealth services. Ask the office which visits can be done by video or phone.
What is the phone number for Gregg M. Santilli?
(903) 463-8400, as listed in official Medicare / NPI Registry data.
What is Gregg M. Santilli's NPI number?
1023099082. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Practice locations

Addresses where Gregg M. Santilli is enrolled with Medicare (CMS data updated 2026-10-02).

Group practices

Medicare enrollment lists Gregg M. Santilli as a member of this group (CMS data updated 2026-10-02).

  • John Allen Van Wagoner, MD, PA9 clinicians in the group

Specialties

Find other Allergy/Immunology doctors in Texas →

Other allergist and immunologists in Texas

Clinicians with the same Medicare primary specialty in Texas — not a recommendation.

All allergist and immunologists in Texas →

Clinician information

CredentialMD
Medical schoolOhio State University College Of Medicine
Graduation year1989
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
TelehealthOffers telehealth services
NPI (National Provider Identifier)1023099082
CorrectionsReport an error or suggest an update →

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

  1. National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
  2. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  3. Medicare Care Compare — official Medicare tool to look up clinicians