John J O'brien, MD - Medicare in O Fallon, MO

John J O'brien, MD is a medicare enrolled "Family Medicine" physician in O Fallon, Missouri. His current practice location is 2630 Highway K, O Fallon, Missouri. You can reach out to his office (for appointments etc.) via phone at (636) 240-5454.

John J O'brien is licensed to practice in Missouri (license number R3E76) 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 1083689061.

Contact Information

John J O'brien, MD
2630 Highway K,
O Fallon, MO 63368-6624
(636) 240-5454
(618) 980-5335

Map and Direction




Physician's Profile

Full NameJohn J O'brien
GenderMale
Speciality
Experience Years
Location2630 Highway K, O Fallon, Missouri
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:
  • John J O'brien attended and graduated from in
  NPI Data:
  • NPI Number: 1083689061
  • Provider Enumeration Date: 02/22/2006
  • Last Update Date: 02/24/2021
  Medicare PECOS Information:
  • PECOS PAC ID:
  • Enrollment ID:

Medical Identifiers

Medical identifiers for John J O'brien such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1083689061NPI-NPPES
080171320OtherMORAILROAD MEDICARE

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207Q00000XFamily Medicine R3E76 (Missouri)Primary

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. John J 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
John J O'brien, MD
2630 Highway K,
O Fallon, MO 63368-6624

Ph: (636) 240-5454
John J O'brien, MD
2630 Highway K,
O Fallon, MO 63368-6624

Ph: (636) 240-5454

Reviews and Comments


Family Medicine Doctors in O Fallon, MO

Dr. Chandra K Wiewel, M.D.
Family Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 1101 Highway K, O Fallon, MO 63366
Phone: 636-379-4590    Fax: 636-669-2401
Amanda Heidemann, MD
Family Medicine
Medicare: Medicare Enrolled
Practice Location: 2630 Highway K, O Fallon, MO 63368
Phone: 636-980-5300    Fax: 636-980-5344
Dr. Ximena Soledad Schnurr, M.D.
Family Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 2630 State Highway K, Ste 100, O Fallon, MO 63368
Phone: 636-240-5454    
Ms. Betty Rachel Varghese, M.D.
Family Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 2 Progress Point Ct, O Fallon, MO 63368
Phone: 636-344-1151    Fax: 636-344-1176
Dr. Amy Elizabeth Grawey, M.D.
Family Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 207 E Pitman St, O Fallon, MO 63366
Phone: 636-875-1140    Fax: 636-898-1960
Dr. Leonard M Hoffmann, M.D.
Family Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 1101 Highway K, O Fallon, MO 63366
Phone: 636-379-4590    Fax: 636-669-2401

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.