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Colorectal Surgery (Proctology)

Armen C. Gregorian, MD

Works at hospitals in Glendale, CA · California

Summary

Armen C. Gregorian, MD (Colorectal Surgery (Proctology)) is listed by Medicare at 2 hospitals in Glendale, CA. NPI 1093909624. Medicare data says the clinician accepts Medicare assignment. Source: CMS Facility Affiliation Data, updated 2026-10-02.

From official Medicare data

This page shows what Medicare's official clinician data says about Armen C. Gregorian, 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

Colorectal Surgery (Proctology)Primary specialty
YesAccepts Medicare assignment
22Years since medical school (graduated 2004)
MaleGender (as listed)
Glendale Adventist Medical CenterGroup practice

Quick answers

Which hospitals does Armen C. Gregorian work at?
Medicare's official clinician data lists Armen C. Gregorian at 2 hospitals: Glendale Adventist Medical Center and USC Verdugo Hills Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
Where does Armen C. Gregorian see patients?
Medicare's clinician data lists 3 practice locations, including Glendale, CA. Call before your visit to confirm the address.
What is Armen C. Gregorian's specialty?
Medicare lists Colorectal Surgery (Proctology) as the primary specialty.
Does Armen C. Gregorian accept Medicare assignment?
Yes. Medicare's clinician data says Armen C. Gregorian 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.
What is the phone number for Armen C. Gregorian?
(818) 863-4099, as listed in official Medicare / NPI Registry data.
What is Armen C. Gregorian's NPI number?
1093909624. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Hospitals where Armen C. Gregorian works

Medicare's Facility Affiliation Data lists Armen C. Gregorian at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.

Practice locations

Addresses where Armen C. Gregorian is enrolled with Medicare (CMS data updated 2026-10-02).

Group practices

Medicare enrollment lists Armen C. Gregorian as a member of this group (CMS data updated 2026-10-02).

  • Glendale Adventist Medical Center103 clinicians in the group

Specialties

Find other Colorectal Surgery (Proctology) doctors in California →

Other colorectal surgeons in Glendale

Clinicians with the same Medicare primary specialty in Glendale, CA — not a recommendation.

All colorectal surgeons in Glendale →

Clinician information

CredentialMD
Graduation year2004
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1093909624
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. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
  2. National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
  3. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  4. Medicare Care Compare — official Medicare tool to look up clinicians