Dr Alexander George Chamessian, MD PHD - Medicare Anesthesiology in Creve Coeur, MO

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Dr Alexander George Chamessian, MD PHD is a medicare enrolled "Anesthesiology - Pain Medicine" physician in Creve Coeur, Missouri. His current practice location is 1044 N Mason Rd, Dept Anesthesiology, Ste L30, Creve Coeur, Missouri. You can reach out to his office (for appointments etc.) via phone at (314) 996-8631.

Dr Alexander George Chamessian is licensed to practice in Missouri (license number 2023022542) and he also participates in the medicare program. He does not accept medicare assignments directly but he may accept medicare through third-party (refer to Reassignment section below) and may also prescribe medicare part D drugs. His NPI Number is 1275194839.

Contact Information

Dr Alexander George Chamessian, MD PHD
1044 N Mason Rd, Dept Anesthesiology, Ste L30,
Creve Coeur, MO 63141-6431
(314) 996-8631
(314) 996-8742

Map and Direction




Physician's Profile

Full NameDr Alexander George Chamessian
GenderMale
SpecialityAnesthesiology - Pain Medicine
Location1044 N Mason Rd, Creve Coeur, Missouri
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1275194839
  • Provider Enumeration Date: 06/25/2019
  • Last Update Date: 04/15/2025
  Medicare PECOS Information:
  • PECOS PAC ID: 4284960295
  • Enrollment ID: I20240712000205

Medical Identifiers

Medical identifiers for Dr Alexander George Chamessian such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1275194839NPI-NPPES
200072045MedicaidMO

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207LP2900XAnesthesiology - Pain Medicine 2023022542 (Missouri)Primary

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. Dr Alexander George Chamessian allows following entities to bill medicare on his behalf.
Entity NameWashington University
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1528005642
PECOS PAC ID: 9830008770
Enrollment ID: O20040129000651
Entity NamePost-acute Physicians Of Missouri, Pc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1164818290
PECOS PAC ID: 6002121126
Enrollment ID: O20150819007678

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. Dr Alexander George Chamessian is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
Dr Alexander George Chamessian, MD PHD
Po Box 7412011,
Chicago, IL 60674-2011

Ph: (314) 996-8631		Dr Alexander George Chamessian, MD PHD
1044 N Mason Rd, Dept Anesthesiology, Ste L30,
Creve Coeur, MO 63141-6431

Ph: (314) 996-8631

Reviews and Comments


Anesthesiology Doctors in Creve Coeur, MO

Dr. Jordan Farley, DO
Anesthesiology
Medicare: Medicare Enrolled
Practice Location: 633 Emerson Rd Ste 100, Creve Coeur, MO 63141
Phone: 314-991-4342    Fax: 844-395-0839
Malti Dave, MD
Anesthesiology
Medicare: Not Enrolled in Medicare
Practice Location: 11605 Studt Ave Ste 120, Creve Coeur, MO 63141
Phone: 314-432-7426    Fax: 314-432-7247

Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

Our Data: Information on www.medicarelist.com is built using data sources published by Centers for Medicare & Medicaid Services (CMS) under Freedom of Information Act (FOIA). The information disclosed on the NPI Registry are FOIA-disclosable and are required to be disclosed under the FOIA and the eFOIA amendments to the FOIA. There is no way to 'opt out' or 'suppress' the NPPES record data for health care providers with active NPIs.