Dr Gary D Gray, MD - Medicare Internal Medicine in O Fallon, MO

Dr Gary D Gray, MD is a medicare enrolled "Internal Medicine" physician in O Fallon, Missouri. He went to Saint Louis University School Of Medicine and graduated in 1999 and has 25 years of diverse experience with area of expertise as Internal Medicine. He is a member of the group practice Internal Medicine At Winghaven, Llc and his current practice location is 5551 Winghaven Blvd, Ste 290, O Fallon, Missouri. You can reach out to his office (for appointments etc.) via phone at (636) 695-2575.

Dr Gary D Gray is licensed to practice in Missouri (license number 2001028980) 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 1497729826.

Contact Information

Dr Gary D Gray, MD
5551 Winghaven Blvd, Ste 290,
O Fallon, MO 63368-3617
(636) 695-2575
(314) 590-5938

Map and Direction




Physician's Profile

Full NameDr Gary D Gray
GenderMale
SpecialityInternal Medicine
Experience25 Years
Location5551 Winghaven Blvd, 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:
  • Dr Gary D Gray attended and graduated from Saint Louis University School Of Medicine in 1999
  NPI Data:
  • NPI Number: 1497729826
  • Provider Enumeration Date: 02/14/2006
  • Last Update Date: 12/02/2014
  Medicare PECOS Information:
  • PECOS PAC ID: 5294832390
  • Enrollment ID: I20070524000580

Medical Identifiers

Medical identifiers for Dr Gary D Gray such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1497729826NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine 2001028980 (Missouri)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
St Luke's Home Health ServicesChesterfield, MOHome health agency
Aw Health CareSaint louis, MOHome health agency
Mercy HospiceSaint louis, MOHospice
St Lukes HospitalChesterfield, MOHospital
Ssm St Joseph Hospital WestLake saint louis, MOHospital
Mercy Hospital St LouisSaint louis, MOHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Internal Medicine At Winghaven, Llc64060186052

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 Gary D Gray allows following entities to bill medicare on his behalf.
Entity NameInternal Medicine At Winghaven, Llc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1487924288
PECOS PAC ID: 6406018605
Enrollment ID: O20120504000377

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 Gary D Gray 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 Gary D Gray, MD
5551 Winghaven Blvd, Ste 290,
O Fallon, MO 63368-3617

Ph: (636) 695-2575
Dr Gary D Gray, MD
5551 Winghaven Blvd, Ste 290,
O Fallon, MO 63368-3617

Ph: (636) 695-2575

Reviews and Comments


Internal Medicine Doctors in O Fallon, MO

Brian A Grus, MD
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Practice Location: 20 Progress Point Pkwy Ste 108, O Fallon, MO 63368
Phone: 636-344-2400    
Alexander Marinov Markov, MD
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Nadia Zia, MD
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Phone: 314-317-0600    Fax: 314-317-0606
Dr. Amy Kathleen Davis, M.D.
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Medicare: Not Enrolled in Medicare
Practice Location: 1008 Rock Creek Elementary School Dr, O Fallon, MO 63366
Phone: 636-281-4410    Fax: 636-281-4412
Dr. Saadia Taufiq Raza, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 6704 Keaton Corp Pkwy, O Fallon, MO 63368
Phone: 636-300-9596    Fax: 636-300-9598
Dr. Genevieve Catherine Matthews, MD
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Medicare: Accepting Medicare Assignments
Practice Location: 20 Progress Point Pkwy Ste 108, O Fallon, MO 63368
Phone: 636-344-2400    Fax: 636-344-2401
Neal Holzum, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 2 Progress Point Ct, Ste 101a, O Fallon, MO 63368
Phone: 636-236-9945    

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.