DR. ALEXANDER GEORGE CHAMESSIAN MD PHD
NPI 1275194839
Physical Medicine & Rehabilitation in Creve Coeur, MO
About Dr. Alexander George Chamessian Md Phd NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. ALEXANDER GEORGE CHAMESSIAN MD PHD (NPI 1275194839) is an individual physical medicine & rehabilitation provider in Creve Coeur, Missouri, licensed in Missouri (2023022542) and active in the NPI registry since June 2019. He is enrolled in Medicare PECOS, is affiliated with Barnes Jewish Hospital, and is a graduate of Other (2019).
NPPES Registry Identity
Specialties & Licenses 3
Other Identifiers 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Alexander George Chamessian Md Phd 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.
Hospital Affiliations CMS Care Compare 3
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Barnes Jewish Hospital
Acute Care Hospitals · Saint Louis, MOMissouri Baptist Medical Center
Acute Care Hospitals · Town And Country, MOBarnes-Jewish West County Hospital
Acute Care Hospitals · Creve Coeur, MOOther Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SAINT LOUIS, MO 63141
SAINT LOUIS, MO 63141
SAINT LOUIS, MO 63141
SAINT LOUIS, MO 63141
SAINT LOUIS, MO 63141
SAINT LOUIS, MO 63141
CREVE COEUR, MO 63141
CREVE COEUR, MO 63141
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 Alexander Chamessian's NPI number?
The NPI number for Alexander Chamessian is 1275194839. It was assigned to this individual provider in the NPPES registry on June 25, 2019.
Where is Alexander Chamessian located?
Alexander Chamessian practices at 1044 N Mason Rd Dept Anesthesiology, Ste L30, Creve Coeur, MO 63141. The listed phone number is (314) 996-8631.
What is Alexander Chamessian's specialty?
The primary specialty registered for this NPI is Physical Medicine & Rehabilitation with taxonomy code 208100000X.
Is Alexander Chamessian enrolled in Medicare?
Yes. Alexander Chamessian 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.
What insurance does Alexander Chamessian accept?
Health plans from Cox HealthPlans, Medica and Oscar Insurance Company list Alexander Chamessian 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.
Is Alexander Chamessian affiliated with any hospitals?
According to CMS data, Alexander Chamessian is affiliated with Barnes Jewish Hospital, Missouri Baptist Medical Center and Barnes-Jewish West County Hospital.
When was this NPI record last updated?
The NPPES record for Alexander Chamessian was last updated on November 21, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.