Calvin Everest Williams, MD - Medicare Anesthesiology in Saint Louis, MO

Calvin Everest Williams, MD is a medicare enrolled "Anesthesiology" physician in Saint Louis, Missouri. He went to University Of Michigan Medical School and graduated in 1979 and has 45 years of diverse experience with area of expertise as Anesthesiology. He is a member of the group practice Midwest Anesthesia Providers Sc, Midwest Anesthesia Providers Sc and his current practice location is 11133 Dunn Rd, Saint Louis, Missouri. You can reach out to his office (for appointments etc.) via phone at (314) 653-5744.

Calvin Everest Williams is licensed to practice in Missouri (license number R3C29) 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 1326085465.

Contact Information

Calvin Everest Williams, MD
11133 Dunn Rd,
Saint Louis, MO 63136-6119
(314) 653-5744
Not Available

Map and Direction




Physician's Profile

Full NameCalvin Everest Williams
GenderMale
SpecialityAnesthesiology
Experience45 Years
Location11133 Dunn Rd, Saint Louis, 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:
  • Calvin Everest Williams attended and graduated from University Of Michigan Medical School in 1979
  NPI Data:
  • NPI Number: 1326085465
  • Provider Enumeration Date: 05/31/2006
  • Last Update Date: 06/28/2023
  Medicare PECOS Information:
  • PECOS PAC ID: 3577539527
  • Enrollment ID: I20040909001195

Medical Identifiers

Medical identifiers for Calvin Everest Williams such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1326085465NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207L00000XAnesthesiology MDR329 (Missouri)Secondary
207L00000XAnesthesiology R3C29 (Missouri)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Christian Hospital NortheastSaint louis, MOHospital
Alton Memorial HospitalAlton, ILHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Midwest Anesthesia Providers Sc9830480581143
Midwest Anesthesia Providers Sc9830480581143

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. Calvin Everest Williams allows following entities to bill medicare on his behalf.
Entity NameSoutheast Missouri Hospital Physicians Llc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1558311522
PECOS PAC ID: 9133024334
Enrollment ID: O20031201000775
Entity NameJefferson City Medical Group Pc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1336189398
PECOS PAC ID: 1850371089
Enrollment ID: O20040908000924
Entity NameDps Anesthesia, Llc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1649339607
PECOS PAC ID: 6901900075
Enrollment ID: O20070329000159
Entity NameMidwest Anesthesia Providers Sc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1295189082
PECOS PAC ID: 9830480581
Enrollment ID: O20160712001846

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. Calvin Everest Williams 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
Calvin Everest Williams, MD
15282 Brightfield Manor Dr,
Chesterfield, MO 63017-2486

Ph: (314) 941-6355
Calvin Everest Williams, MD
11133 Dunn Rd,
Saint Louis, MO 63136-6119

Ph: (314) 653-5744

Reviews and Comments


Anesthesiology Doctors in Saint Louis, MO

Dr. Pawan S Sethi, M.D.
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Medicare: Accepting Medicare Assignments
Practice Location: 12700 Southfork Rd Ste 153, Saint Louis, MO 63128
Phone: 314-543-5283    Fax: 314-543-5233
Paul S Patane, M.D.
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Medicare: May Accept Medicare Assignments
Practice Location: 3015 N Ballas Rd, Saint Louis, MO 63131
Phone: 314-996-5330    Fax: 314-810-1399
Dr. Thomas James Graetz, MD
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Medicare: Accepting Medicare Assignments
Practice Location: 1 Barnes Jewish Hospital Plz, Dept Anesthesiology, Saint Louis, MO 63110
Phone: 800-862-9980    Fax: 314-362-1185
Dr. Charles Meador Robertson, MD
Anesthesiology
Medicare: Accepting Medicare Assignments
Practice Location: 1 Childrens Pl, Dept Anesthesiology, Saint Louis, MO 63110
Phone: 800-862-9980    Fax: 314-362-1185
Dr. Yunhong Zhang, MD
Anesthesiology
Medicare: Accepting Medicare Assignments
Practice Location: 10010 Kennerly Rd, Saint Louis, MO 63128
Phone: 314-525-1000    
Katherine Elizabeth Stiles, MD
Anesthesiology
Medicare: Medicare Enrolled
Practice Location: 1 Childrens Pl, Saint Louis, MO 63110
Phone: 314-454-6215    Fax: 314-454-2296
Rebecca Chen, MD
Anesthesiology
Medicare: Not Enrolled in Medicare
Practice Location: 1 Barnes Jewish Hospital Plz, Saint Louis, MO 63110
Phone: 314-362-5000    

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).

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