Dr Mark Williams, MBBS - Medicare Anesthesiology in Rochester, NY

  1. Home
Dr Mark Williams, MBBS is a medicare enrolled "Anesthesiology" in Rochester, New York. He graduated from nursing school in 2007 and has 17 years of diverse experience with area of expertise as Anesthesiology. He is a member of the group practice U Of R Anesthesiology Group and his current practice location is University Of Rochester Medical Ctr, 601 Elmwood Ave, Box 604, Rochester, New York. You can reach out to his office (for appointments etc.) via phone at (585) 275-1384.

Dr Mark Williams is licensed to practice in New York (license number 286923) 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 1295178242.

Contact Information

Dr Mark Williams, MBBS
University Of Rochester Medical Ctr, 601 Elmwood Ave, Box 604,
Rochester, NY 14642-0001
(585) 275-1384
Not Available

Map and Direction




Provider's Profile

Full NameDr Mark Williams
GenderMale
SpecialityAnesthesiology
Experience17 Years
LocationUniversity Of Rochester Medical Ctr, Rochester, 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 Mark Williams graduated from nursing school in 2007
  NPI Data:
  • NPI Number: 1295178242
  • Provider Enumeration Date: 04/09/2013
  • Last Update Date: 07/07/2023
  Medicare PECOS Information:
  • PECOS PAC ID: 0941593388
  • Enrollment ID: I20170802000131

Medical Identifiers

Medical identifiers for Dr Mark Williams such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1295178242NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
363AM0700XPhysician Assistant - Medical 286923 (New York)Secondary
390200000XStudent In An Organized Health Care Education/training Program (* (Not Available))Secondary
207L00000XAnesthesiology 286923 (New York)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Strong Memorial HospitalRochester, NYHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
U Of R Anesthesiology Group3476451105241

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 Mark Williams allows following entities to bill medicare on his behalf.
Entity NameSt James Hospital
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1699839431
PECOS PAC ID: 0345154480
Enrollment ID: O20031113000649
Entity NameU Of R Anesthesiology Group
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1609806488
PECOS PAC ID: 3476451105
Enrollment ID: O20031219000433
Entity NameNicholas H Noyes Memorial Hospital
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1982625661
PECOS PAC ID: 3072505536
Enrollment ID: O20040402000492

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 Mark 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 Mark Williams, MBBS
601 Elmwood Ave Box 604,
Rochester, NY 14642-0001

Ph: () -		Dr Mark Williams, MBBS
University Of Rochester Medical Ctr, 601 Elmwood Ave, Box 604,
Rochester, NY 14642-0001

Ph: (585) 275-1384

Reviews and Comments



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.