Mark Alexander Calderwood, MD - Medicare Ophthalmology in Hamilton, MT

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Mark Alexander Calderwood, MD is a medicare enrolled "Ophthalmology" physician in Hamilton, Montana. His current practice location is 300 N 10th St Ste A, Hamilton, Montana. You can reach out to his office (for appointments etc.) via phone at (406) 363-5434.

Mark Alexander Calderwood is licensed to practice in Montana (license number MED-PHYS-LIC-7129) 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 1447353024.

Contact Information

Mark Alexander Calderwood, MD
300 N 10th St Ste A,
Hamilton, MT 59840-5322
(406) 363-5434
(406) 363-5210

Map and Direction




Physician's Profile

Full NameMark Alexander Calderwood
GenderMale
SpecialityOphthalmology
Location300 N 10th St Ste A, Hamilton, Montana
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1447353024
  • Provider Enumeration Date: 09/07/2006
  • Last Update Date: 11/12/2024
  Medicare PECOS Information:
  • PECOS PAC ID: 1759360381
  • Enrollment ID: I20060322000258

Medical Identifiers

Medical identifiers for Mark Alexander Calderwood such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1447353024NPI-NPPES
100029272MedicaidMT
1447353024MedicaidID

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207W00000XOphthalmology MED-PHYS-LIC-7129 (Montana)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. Mark Alexander Calderwood allows following entities to bill medicare on his behalf.
Entity NameMarcus Daly Memorial Hospital Corporation
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1659475846
PECOS PAC ID: 5597664474
Enrollment ID: O20040202001033

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. Mark Alexander Calderwood 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
Mark Alexander Calderwood, MD
1200 Westwood Dr,
Hamilton, MT 59840-2345

Ph: () -		Mark Alexander Calderwood, MD
300 N 10th St Ste A,
Hamilton, MT 59840-5322

Ph: (406) 363-5434

Reviews and Comments


Ophthalmology Doctors in Hamilton, MT

Brock Alonzo, M.D.
Ophthalmology
Medicare: Medicare Enrolled
Practice Location: 300 N 10th St Ste A, Hamilton, MT 59840
Phone: 406-363-5434    Fax: 406-363-5210

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.