Dr John William Rains, MD - Medicare Emergency Medicine in Saint Louis, MO

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Dr John William Rains, MD is a medicare enrolled "Emergency Medicine" physician in Saint Louis, Missouri. His current practice location is 1 Barnes Jewish Hospital Plz, Dept Emergency Med, Saint Louis, Missouri. You can reach out to his office (for appointments etc.) via phone at (314) 362-9123.

Dr John William Rains is licensed to practice in Missouri (license number 2023050075) 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 1730765520.

Contact Information

Dr John William Rains, MD
1 Barnes Jewish Hospital Plz, Dept Emergency Med,
Saint Louis, MO 63110-1003
(314) 362-9123
(314) 362-0478

Map and Direction




Physician's Profile

Full NameDr John William Rains
GenderMale
SpecialityEmergency Medicine
Location1 Barnes Jewish Hospital Plz, Saint Louis, Missouri
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1730765520
  • Provider Enumeration Date: 03/22/2021
  • Last Update Date: 07/01/2025
  Medicare PECOS Information:
  • PECOS PAC ID: 7911308994
  • Enrollment ID: I20240725001165

Medical Identifiers

Medical identifiers for Dr John William Rains such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1730765520NPI-NPPES
200141349MedicaidMO

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207P00000XEmergency Medicine 2023050075 (Missouri)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. Dr John William Rains allows following entities to bill medicare on his behalf.
Entity NameCox-monett Hospital, Inc.
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1669687125
PECOS PAC ID: 0345236667
Enrollment ID: O20040521000080
Entity NameLester E Cox Medical Centers
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1538334396
PECOS PAC ID: 1254248917
Enrollment ID: O20050624000293
Entity NameCox-monett Hospital, Inc.
Entity TypePart A Provider - Critical Access Hospital
Entity IdentifiersNPI Number: 1194757500
PECOS PAC ID: 0345236667
Enrollment ID: O20071201000165

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 Rains 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 Rains, MD
Po Box 7411626,
Chicago, IL 60674-5626

Ph: Not Available		Dr John William Rains, MD
1 Barnes Jewish Hospital Plz, Dept Emergency Med,
Saint Louis, MO 63110-1003

Ph: (314) 362-9123

Reviews and Comments


Emergency Medicine Doctors in Saint Louis, MO

Sean Oliver Cavanaugh, MD
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Rahul Gupta, MD
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Practice Location: 400 S Kingshighway Blvd, Dept Emergency Med, Saint Louis, MO 63110
Phone: 314-362-9123    Fax: 314-747-3338

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.