Dr William S Potter, MD - Medicare Ophthalmology in Greenwich, CT

Dr William S Potter, MD is a medicare enrolled "Ophthalmology" physician in Greenwich, Connecticut. He went to New York Medical College and graduated in 1985 and has 39 years of diverse experience with area of expertise as Ophthalmology. He is a member of the group practice Refocus Eye Health Of Central Connecticut Pc and his current practice location is 4 Dearfield Dr, Greenwich, Connecticut. You can reach out to his office (for appointments etc.) via phone at (203) 869-3082.

Dr William S Potter is licensed to practice in Connecticut (license number 030761) 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 1205834645.

Contact Information

Dr William S Potter, MD
4 Dearfield Dr,
Greenwich, CT 06831-5351
(203) 869-3082
(203) 869-6453

Map and Direction




Physician's Profile

Full NameDr William S Potter
GenderMale
SpecialityOphthalmology
Experience39 Years
Location4 Dearfield Dr, Greenwich, Connecticut
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 William S Potter attended and graduated from New York Medical College in 1985
  NPI Data:
  • NPI Number: 1205834645
  • Provider Enumeration Date: 07/11/2005
  • Last Update Date: 07/02/2010
  Medicare PECOS Information:
  • PECOS PAC ID: 9133186083
  • Enrollment ID: I20110429000127

Medical Identifiers

Medical identifiers for Dr William S Potter such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1205834645NPI-NPPES
533386OtherAETNA
60K731OtherEMPIRE
010030761CT05OtherANTHEM BCBS
2V8864OtherHEALTHNET
030761OtherCONNECTICARE

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207W00000XOphthalmology 030761 (Connecticut)Primary

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Refocus Eye Health Of Central Connecticut Pc559717683442

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 William S Potter allows following entities to bill medicare on his behalf.
Entity NameGreenwich Ophthalmology Assoc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1700879004
PECOS PAC ID: 1759375561
Enrollment ID: O20040414000154
Entity NameRefocus Eye Health Of Central Connecticut Pc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1548874936
PECOS PAC ID: 5597176834
Enrollment ID: O20201118000388

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 William S Potter 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 William S Potter, MD
4 Dearfield Dr,
Greenwich, CT 06831-5351

Ph: (203) 869-3082
Dr William S Potter, MD
4 Dearfield Dr,
Greenwich, CT 06831-5351

Ph: (203) 869-3082

Reviews and Comments


Ophthalmology Doctors in Greenwich, CT

Christienne F Coates, MD
Ophthalmology
Medicare: Accepting Medicare Assignments
Practice Location: 4 Dearfield Dr, Greenwich, CT 06831
Phone: 203-819-3082    Fax: 203-869-6453
Dr. Mahsa Ava Sohrab, M.D.
Ophthalmology
Medicare: Accepting Medicare Assignments
Practice Location: 25 Valley Dr Ste 2b, Greenwich, CT 06831
Phone: 203-340-1301    Fax: 442-223-0286
Dr. Milton F. Campbell Sr., MD
Ophthalmology
Medicare: Not Enrolled in Medicare
Practice Location: 4 Dearfield Dr, Greenwich, CT 06831
Phone: 203-869-3082    
Dr. Gina Gladstein, MD
Ophthalmology
Medicare: Accepting Medicare Assignments
Practice Location: 4 Dearfield Dr, Greenwich, CT 06831
Phone: 203-869-3082    Fax: 203-869-6453
Dr. Omar Razzaque Shakir, MD MBA
Ophthalmology
Medicare: Accepting Medicare Assignments
Practice Location: 600 W Putnam Ave Lowr Level, Greenwich, CT 06830
Phone: 321-960-2664    
Mr. Joseph C Conway Jr., MD
Ophthalmology
Medicare: Accepting Medicare Assignments
Practice Location: 4 Dearfield Drive, Greenwich, CT 06831
Phone: 203-869-3082    Fax: 203-869-6453

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.