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Ophthalmology

Guy G. Massry, MD

Sees patients in West Hills, CA · California

Summary

Guy G. Massry, MD (Ophthalmology) is enrolled with Medicare at 1 practice location in West Hills, CA. NPI 1134137441. Source: CMS National Downloadable File, updated 2026-10-02.

Call(818) 883‑0112 NPI Registry record Medicare profile

From official Medicare data

This page shows what Medicare's official clinician data says about Guy G. Massry, 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
OphthalmologyPrimary specialty
May acceptAccepts Medicare assignment
36Years since medical school (graduated 1990)
University Of Southern California Keck School Of MedicineMedical school
MaleGender (as listed)
Jonathan M. Davidorf, M.D. Inc.Group practice

Quick answers

Where does Guy G. Massry see patients?
Medicare's clinician data lists 1 practice location in West Hills, CA. Call before your visit to confirm the address.
What is Guy G. Massry's specialty?
Medicare lists Ophthalmology as the primary specialty.
Does Guy G. Massry accept Medicare assignment?
Medicare's clinician data says Guy G. Massry may accept Medicare assignment (as of 2026-10-02). Ask the office whether they accept it for your visit.
What is the phone number for Guy G. Massry?
(818) 883-0112, as listed in official Medicare / NPI Registry data.
What is Guy G. Massry's NPI number?
1134137441. 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 Guy G. Massry is enrolled with Medicare (CMS data updated 2026-10-02).

Group practices

Medicare enrollment lists Guy G. Massry as a member of this group (CMS data updated 2026-10-02).

  • Jonathan M. Davidorf, M.D. Inc.6 clinicians in the group

Specialties

Find other Ophthalmology doctors in California →

Other ophthalmologists in West Hills

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

All ophthalmologists in West Hills →

Clinician information

CredentialMD
Medical schoolUniversity Of Southern California Keck School Of Medicine
Graduation year1990
Gender (as listed)Male
Medicare assignmentMay accept for some services
NPI (National Provider Identifier)1134137441
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