Dr Sean M O'brien, DO - Medicare Internal Medicine in Nogales, AZ

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Dr Sean M O'brien, DO is a medicare enrolled "Internal Medicine" physician in Nogales, Arizona. He went to At Still University Of Health Sciences, College Of Osteo Med, Kirksville and graduated in 1990 and has 36 years of diverse experience with area of expertise as Internal Medicine. He is a member of the group practice Mariposa Community Health Center Inc and his current practice location is 3231 N Grand Ave, Nogales, Arizona. You can reach out to his office (for appointments etc.) via phone at (520) 281-1550.

Dr Sean M O'brien is licensed to practice in Arizona (license number 2883) 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 1912994500.

Contact Information

Dr Sean M O'brien, DO
3231 N Grand Ave,
Nogales, AZ 85621-3905
(520) 281-1550
(520) 281-1112

Map and Direction




Physician's Profile

Full NameDr Sean M O'brien
GenderMale
SpecialityInternal Medicine
Experience36 Years
Location3231 N Grand Ave, Nogales, Arizona
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 Sean M O'brien attended and graduated from At Still University Of Health Sciences, College Of Osteo Med, Kirksville in 1990
  NPI Data:
  • NPI Number: 1912994500
  • Provider Enumeration Date: 09/29/2005
  • Last Update Date: 01/17/2024
  Medicare PECOS Information:
  • PECOS PAC ID: 3971493313
  • Enrollment ID: I20190907000319

Medical Identifiers

Medical identifiers for Dr Sean M O'brien such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1912994500NPI-NPPES
320664MedicaidAZ

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RN0300XInternal Medicine - Nephrology 2883 (Arizona)Secondary
207R00000XInternal Medicine 2883 (Arizona)Primary

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Mariposa Community Health Center Inc812392632630

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 Sean M O'brien allows following entities to bill medicare on his behalf.
Entity NameRosebud Indian Health Service
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1194757369
PECOS PAC ID: 6901704055
Enrollment ID: O20031226000337
Entity NameSan Carlos Apache Healthcare Corporation
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1265813075
PECOS PAC ID: 0648580597
Enrollment ID: O20151105002091

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 Sean M O'brien 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 Sean M O'brien, DO
825 N Grand Ave Ste 100,
Nogales, AZ 85621-1061

Ph: (520) 761-2133		Dr Sean M O'brien, DO
3231 N Grand Ave,
Nogales, AZ 85621-3905

Ph: (520) 281-1550

Reviews and Comments


Internal Medicine Doctors in Nogales, AZ

Dr. Jorge Raul Mera, MD
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Practice Location: 1852 N Mastick Way, Nogales, AZ 85621
Phone: 520-281-1550    Fax: 520-281-2335
Dr. Eladio Pereira, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 1852 N Mastick Way, Mariposa Community Health Center, Nogales, AZ 85621
Phone: 520-281-1550    Fax: 520-281-1112
Jorge Omar Flores Lopez, M.D.
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Practice Location: 1852 N Mastick Way, Nogales, AZ 85621
Phone: 520-281-1500    
Dr. Athar A. Shaikh, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 480 N Morley Ave, Nogales, AZ 85621
Phone: 520-287-5728    Fax: 520-287-5959
Dr. Michael Colvin Hinkson, MD
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Medicare: Not Enrolled in Medicare
Practice Location: 1852 N Mastick Way, Nogales, AZ 85621
Phone: 520-281-1550    Fax: 520-281-2335
Dr. Andrew J Wolffe, M.D.
Internal Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 1171 W Target Range Rd, Nogales, AZ 85621
Phone: 520-285-3000    Fax: 520-285-3000

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.