Dr Allen M Williams, MD - Medicare Anesthesiology in Smithtown, NY

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Dr Allen M Williams, MD is a medicare enrolled "Anesthesiology" physician in Smithtown, New York. He graduated from medical school in 1991 and has 34 years of diverse experience with area of expertise as Anesthesiology. He is a member of the group practice North Shore - Lij Anesthesiology, Pc and his current practice location is 415 W Main St, Smithtown, New York. You can reach out to his office (for appointments etc.) via phone at (631) 521-7341.

Dr Allen M Williams is licensed to practice in New York (license number 223882) 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 1720062680.

Contact Information

Dr Allen M Williams, MD
415 W Main St,
Smithtown, NY 11787-2612
(631) 521-7341
(631) 521-7342

Map and Direction




Physician's Profile

Full NameDr Allen M Williams
GenderMale
SpecialityAnesthesiology
Experience34 Years
Location415 W Main St, Smithtown, New York
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 Allen M Williams graduated from medical school in 1991
  NPI Data:
  • NPI Number: 1720062680
  • Provider Enumeration Date: 12/05/2005
  • Last Update Date: 03/18/2014
  Medicare PECOS Information:
  • PECOS PAC ID: 0042204224
  • Enrollment ID: I20040830000933

Medical Identifiers

Medical identifiers for Dr Allen M Williams such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1720062680NPI-NPPES
02246091MedicaidNY

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207L00000XAnesthesiology 223882 (New York)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
John T Mather Memorial Hospital Of Port JeffersonPort jefferson, NYHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
North Shore - Lij Anesthesiology, Pc1153602453937

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 Allen M Williams allows following entities to bill medicare on his behalf.
Entity NameMontefiore Medical Center
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1063525152
PECOS PAC ID: 3779496021
Enrollment ID: O20031113000235
Entity NameNorth American Partners In Anesthesia Llp
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1649264706
PECOS PAC ID: 7719885771
Enrollment ID: O20040108000176
Entity NameOswego Hospital
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1871678458
PECOS PAC ID: 4981686045
Enrollment ID: O20040602001275
Entity NameJamaica Anesthesiologist Pc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1508812892
PECOS PAC ID: 1355323460
Enrollment ID: O20040602001672
Entity NameBronx Anesthesia Services, Pc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1225330103
PECOS PAC ID: 9739360421
Enrollment ID: O20110301000635
Entity NameNorth Shore - Lij Anesthesiology, Pc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1417401266
PECOS PAC ID: 1153602453
Enrollment ID: O20161228001498

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 Allen M 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
Dr Allen M Williams, MD
415 W Main St,
Smithtown, NY 11787-2612

Ph: (631) 521-7341		Dr Allen M Williams, MD
415 W Main St,
Smithtown, NY 11787-2612

Ph: (631) 521-7341

Reviews and Comments


Anesthesiology Doctors in Smithtown, NY

Dr. Vineet Gambhir, MD
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Dr. Doris Tamai, D.O.
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Dr. Salvatore Daniel Buffa, M.D.
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Timothy D Groth, M.D.
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Practice Location: 994 W Jericho Tpke, Suite 104, Smithtown, NY 11787
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Dr. Jeany Pierre-louis, M.D.
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Phone: 631-862-3413    Fax: 631-862-3604
Dr. Anthony Bonanno, M.D.
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Practice Location: 50 Route 25a, Smithtown, NY 11787
Phone: 631-862-3413    Fax: 631-862-3604
Dr. Steven Cohen, M.D.
Anesthesiology
Medicare: Accepting Medicare Assignments
Practice Location: 48 Route 25a, Suite 101, Smithtown, NY 11787
Phone: 631-862-3413    Fax: 631-862-3604

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.