William Wang, MD - Medicare Psychiatry in O Fallon, MO

William Wang, MD is a medicare enrolled "Psychiatry & Neurology - Psychiatry" physician in O Fallon, Missouri. He graduated from medical school in 1985 and has 39 years of diverse experience with area of expertise as Psychiatry. His current practice location is 601 Arrow Ln, O Fallon, Missouri. You can reach out to his office (for appointments etc.) via phone at (314) 441-9594.

William Wang is licensed to practice in Missouri (license number 2001019999) 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 1306950985.

Contact Information

William Wang, MD
601 Arrow Ln,
O Fallon, MO 63366-4410
(314) 441-9594
Not Available

Map and Direction




Physician's Profile

Full NameWilliam Wang
GenderMale
SpecialityPsychiatry
Experience39 Years
Location601 Arrow Ln, 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:
  • William Wang graduated from medical school in 1985
  NPI Data:
  • NPI Number: 1306950985
  • Provider Enumeration Date: 08/19/2006
  • Last Update Date: 03/21/2022
  Medicare PECOS Information:
  • PECOS PAC ID: 3476550559
  • Enrollment ID: I20061102000354

Medical Identifiers

Medical identifiers for William Wang such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1306950985NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
2084P0800XPsychiatry & Neurology - Psychiatry 2001019999 (Missouri)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Ssm Depaul Health CenterBridgeton, MOHospital

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. William Wang allows following entities to bill medicare on his behalf.
Entity NameWilliam Wang Llc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1336235308
PECOS PAC ID: 8224100862
Enrollment ID: O20080626000523

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. William Wang 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
William Wang, MD
Po Box 8412,
Saint Louis, MO 63132-0412

Ph: (314) 441-9594
William Wang, MD
601 Arrow Ln,
O Fallon, MO 63366-4410

Ph: (314) 441-9594

Reviews and Comments


Psychiatry & Neurology Doctors in O Fallon, MO

John P Canale, M.D.
Psychiatry & Neurology
Medicare: Accepting Medicare Assignments
Practice Location: 4132 Keaton Crossing Blvd, Ste 201, O Fallon, MO 63368
Phone: 636-244-3589    Fax: 636-244-3594
Scott Johann Arbaugh, M.D.
Psychiatry & Neurology
Medicare: Accepting Medicare Assignments
Practice Location: 9979 Winghaven Blvd, Ste 202, O Fallon, MO 63368
Phone: 636-695-4554    Fax: 636-695-3099

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.