William I Parker, MD - Medicare Emergency Medicine in Mason City, IA

William I Parker, MD is a medicare enrolled "Emergency Medicine" physician in Mason City, Iowa. His current practice location is 1000 4th St Sw, Suite Er, Mason City, Iowa. You can reach out to his office (for appointments etc.) via phone at (641) 422-7234.

William I Parker is licensed to practice in Iowa (license number 28723) 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 1356459903.

Contact Information

William I Parker, MD
1000 4th St Sw, Suite Er,
Mason City, IA 50401-2800
(641) 422-7234
(641) 422-6373



Physician's Profile

Full NameWilliam I Parker
GenderMale
SpecialityEmergency Medicine
Location1000 4th St Sw, Mason City, Iowa
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1356459903
  • Provider Enumeration Date: 08/25/2006
  • Last Update Date: 10/11/2023
  Medicare PECOS Information:
  • PECOS PAC ID: 6800783044
  • Enrollment ID: I20040302000687

Medical Identifiers

Medical identifiers for William I Parker such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1356459903NPI-NPPES
2073189MedicaidIA
47792OtherIAWELLMARK

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207P00000XEmergency Medicine 28723 (Iowa)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. William I Parker allows following entities to bill medicare on his behalf.
Entity NameNorth Iowa Mercy Clinics
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1780278242
PECOS PAC ID: 7810809076
Enrollment ID: O20031105000273

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Entity NameLakes Regional Healthcare
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1336291160
PECOS PAC ID: 0941118442
Enrollment ID: O20031223000386

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Entity NameSpencer Municipal Hospital
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1396732186
PECOS PAC ID: 4183533060
Enrollment ID: O20040128000325

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Entity NameKossuth Regional Health Center
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1184636557
PECOS PAC ID: 3375454259
Enrollment ID: O20040319000696

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› Verified 2 days ago

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. William I Parker 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
William I Parker, MD
621 S Illinois Ave, Suite 103,
Mason City, IA 50401-5489

Ph: (641) 494-3041
William I Parker, MD
1000 4th St Sw, Suite Er,
Mason City, IA 50401-2800

Ph: (641) 422-7234

News Archive

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› Verified 2 days ago


Emergency Medicine Doctors in Mason City, IA

Dr. Satinderjit Singh, M.D.
Emergency Medicine
Medicare: Medicare Enrolled
Practice Location: 1000 4th St Sw, Mason City, IA 50401
Phone: 641-428-7234    Fax: 641-428-6373
Paul H Gordon, MD
Emergency Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 1010 4th St Sw, Mason City, IA 50401
Phone: 641-422-6020    Fax: 641-422-7803
Dr. Brian Michael Kuchay, M.D.
Emergency Medicine
Medicare: Medicare Enrolled
Practice Location: 621 S Illinois Ave, Mason City, IA 50401
Phone: 641-428-7234    
Tavi J Madden-leduc, DO
Emergency Medicine
Medicare: Medicare Enrolled
Practice Location: 1000 4th St Sw, Mason City, IA 50401
Phone: 641-422-7234    Fax: 641-422-6373
Dr. Rajendra Singh, MD
Emergency Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 1000 4th St Sw, Suite Er, Mason City, IA 50401
Phone: 641-422-7234    Fax: 641-422-6373
Dr. Matthew J Schiller, MD
Emergency Medicine
Medicare: Medicare Enrolled
Practice Location: 1000 4th St Sw, Suite Er, Mason City, IA 50401
Phone: 641-422-7234    Fax: 641-422-6373

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