Amy Tesar, DO - Medicare Internal Medicine in Mason City, IA

Amy Tesar, DO is a medicare enrolled "Internal Medicine" physician in Mason City, Iowa. She graduated from medical school in 2002 and has 22 years of diverse experience with area of expertise as Internal Medicine. She is a member of the group practice North Iowa Mercy Clinics and her current practice location is 1000 4th St Sw, Mason City, Iowa. You can reach out to her office (for appointments etc.) via phone at (641) 428-6999.

Amy Tesar is licensed to practice in Iowa (license number DO-03524) and she also participates in the medicare program. She accepts medicare assignments (which means she accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and her NPI Number is 1841307477.

Contact Information

Amy Tesar, DO
1000 4th St Sw,
Mason City, IA 50401-2800
(641) 428-6999
(641) 428-6678

Map and Direction




Physician's Profile

Full NameAmy Tesar
GenderFemale
SpecialityInternal Medicine
Experience22 Years
Location1000 4th St Sw, Mason City, Iowa
Accepts Medicare AssignmentsYes. She accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Amy Tesar graduated from medical school in 2002
  NPI Data:
  • NPI Number: 1841307477
  • Provider Enumeration Date: 08/23/2006
  • Last Update Date: 04/26/2021
  Medicare PECOS Information:
  • PECOS PAC ID: 8527089580
  • Enrollment ID: I20051219000247

Medical Identifiers

Medical identifiers for Amy Tesar such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1841307477NPI-NPPES
04350OtherIAWELLMARK
0480475MedicaidIA

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine 03524 (Iowa)Secondary
208M00000XHospitalist 3524 (Iowa)Secondary
207R00000XInternal Medicine DO-03524 (Iowa)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Mercyone North Iowa Medical CenterMason city, IAHospital
Franklin General HospitalHampton, IAHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
North Iowa Mercy Clinics7810809076247

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. Amy Tesar allows following entities to bill medicare on her behalf.
Entity NameNorth Iowa Mercy Clinics
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1780278242
PECOS PAC ID: 7810809076
Enrollment ID: O20031105000273

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. Amy Tesar 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
Amy Tesar, DO
621 S Illinois Ave, Suite 103,
Mason City, IA 50401-5489

Ph: (515) 532-2811
Amy Tesar, DO
1000 4th St Sw,
Mason City, IA 50401-2800

Ph: (641) 428-6999

Reviews and Comments


Internal Medicine Doctors in Mason City, IA

Burt Humburg, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 1000 4th St Sw, Mason City, IA 50401
Phone: 641-428-7000    Fax: 641-428-6383
Sumathy Nagraj Iyengar, M.D.,
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 1000 4th St Sw, Mercy Medical Center-hospitalist Dept, Mason City, IA 50401
Phone: 641-428-7000    
Mark C Johnson, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 910 N Eisenhower Ave, Mason City, IA 50401
Phone: 641-428-7799    Fax: 641-428-5274
Dr. Joseph Dean Mccracken, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 1000 4th St Sw, Mason City, IA 50401
Phone: 641-428-6300    Fax: 641-428-6347
Mohamed Abd El Maksoud,
Internal Medicine
Medicare: Medicare Enrolled
Practice Location: 1010 4th St Sw, Suite 305, Mason City, IA 50401
Phone: 641-428-5700    Fax: 641-428-2515
Nathaniel Hitt, DO
Internal Medicine
Medicare: Medicare Enrolled
Practice Location: 621 S Illinois Ave Ste 100, Mason City, IA 50401
Phone: 641-428-6900    Fax: 641-428-3909
Dr. Byron T Beasley, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 250 S Crescent Dr, Mason City, IA 50401
Phone: 641-494-5300    Fax: 641-494-5329

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.