Dr John William Mcmahon Jr, MD - Medicare Obstetrics/gynecology in Helena, MT

Dr John William Mcmahon Jr, MD is a medicare enrolled "Obstetrics & Gynecology - Obstetrics" physician in Helena, Montana. He went to University Of Washington School Of Medicine and graduated in 1983 and has 41 years of diverse experience with area of expertise as Obstetrics/gynecology. He is a member of the group practice Arizona Obgyn Affiliates, Pc, Cobre Valley Regional Medical Center and his current practice location is 45 Medical Park Dr, Helena, Montana. You can reach out to his office (for appointments etc.) via phone at (406) 442-1914.

Dr John William Mcmahon Jr is licensed to practice in Montana (license number 6594) and he also participates in the medicare program. He accepts medicare assignments (which means he accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and his NPI Number is 1417060328.

Contact Information

Dr John William Mcmahon Jr, MD
45 Medical Park Dr,
Helena, MT 59601-4949
(406) 442-1914
(406) 443-2901



Physician's Profile

Full NameDr John William Mcmahon Jr
GenderMale
SpecialityObstetrics/gynecology
Experience41 Years
Location45 Medical Park Dr, Helena, Montana
Accepts Medicare AssignmentsYes. He accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Dr John William Mcmahon Jr attended and graduated from University Of Washington School Of Medicine in 1983
  NPI Data:
  • NPI Number: 1417060328
  • Provider Enumeration Date: 08/16/2006
  • Last Update Date: 10/13/2016
  Medicare PECOS Information:
  • PECOS PAC ID: 9537230792
  • Enrollment ID: I20210820002435

Medical Identifiers

Medical identifiers for Dr John William Mcmahon Jr such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1417060328NPI-NPPES
CN6268OtherMTRAILROAD MEDICARE

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207VX0000XObstetrics & Gynecology - Obstetrics 6594 (Montana)Primary

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Arizona Obgyn Affiliates, Pc7911094040102
Cobre Valley Regional Medical Center064818169327

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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 John William Mcmahon Jr allows following entities to bill medicare on his behalf.
Entity NameCobre Valley Regional Medical Center
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1871566521
PECOS PAC ID: 0648181693
Enrollment ID: O20040312001228

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Entity NameArizona Obgyn Affiliates, Pc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1750589404
PECOS PAC ID: 7911094040
Enrollment ID: O20071106000295

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Entity NameBanner Physician Specialists Arizona Llc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1316228802
PECOS PAC ID: 6204002272
Enrollment ID: O20111222000509

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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 John William Mcmahon Jr 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 John William Mcmahon Jr, MD
45 Medical Park Dr,
Helena, MT 59601-4949

Ph: (406) 442-1914
Dr John William Mcmahon Jr, MD
45 Medical Park Dr,
Helena, MT 59601-4949

Ph: (406) 442-1914

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Obstetrics & Gynecology Doctors in Helena, MT

Dr. Andrew Mark Malany, M.D.
Obstetrics & Gynecology
Medicare: Accepting Medicare Assignments
Practice Location: 2525 E Broadway St Ste 204, Helena, MT 59601
Phone: 406-457-4366    Fax: 406-457-4369
Maria Huntley, M.D.
Obstetrics & Gynecology
Medicare: Accepting Medicare Assignments
Practice Location: 2525 E Broadway St, Suite 204, Helena, MT 59601
Phone: 406-457-4366    Fax: 406-457-4367
Jessica Parson, M.D.
Obstetrics & Gynecology
Medicare: Accepting Medicare Assignments
Practice Location: 45 Medical Park Dr, Helena, MT 59601
Phone: 406-442-1914    Fax: 406-443-3012
Michael S Hay, M.D.
Obstetrics & Gynecology
Medicare: Not Enrolled in Medicare
Practice Location: 2525 E Broadway St, Ste 204, Helena, MT 59601
Phone: 406-457-4366    Fax: 406-457-4367
Alexis Rae O'leary, DO
Obstetrics & Gynecology
Medicare: Accepting Medicare Assignments
Practice Location: 45 Medical Park Dr, Helena, MT 59601
Phone: 406-442-1914    

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