Dr Warren Lewis Fields, MD - Medicare Internal Medicine in Mystic, CT

Dr Warren Lewis Fields, MD is a medicare enrolled "Internal Medicine" physician in Mystic, Connecticut. He went to University Of Connecticut School Of Medicine and graduated in 1991 and has 33 years of diverse experience with area of expertise as Internal Medicine. He is a member of the group practice Hartford Healthcare Medical Group Inc, Hospital Medicine Associates Llc and his current practice location is 200 Sandy Hollow Rd, Mystic, Connecticut. You can reach out to his office (for appointments etc.) via phone at (860) 572-8911.

Dr Warren Lewis Fields is licensed to practice in Connecticut (license number 035098) 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 1821083999.

Contact Information

Dr Warren Lewis Fields, MD
200 Sandy Hollow Rd,
Mystic, CT 06355-1720
(860) 572-8911
(860) 572-7758

Map and Direction




Physician's Profile

Full NameDr Warren Lewis Fields
GenderMale
SpecialityInternal Medicine
Experience33 Years
Location200 Sandy Hollow Rd, Mystic, 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 Warren Lewis Fields attended and graduated from University Of Connecticut School Of Medicine in 1991
  NPI Data:
  • NPI Number: 1821083999
  • Provider Enumeration Date: 09/15/2005
  • Last Update Date: 12/22/2009
  Medicare PECOS Information:
  • PECOS PAC ID: 6608916788
  • Enrollment ID: I20091222000080

Medical Identifiers

Medical identifiers for Dr Warren Lewis Fields such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1821083999NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine 035098 (Connecticut)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Hartford Healthcare At HomeBloomfield, CTHospice
Lawrence & Memorial HospitalNew london, CTHospital
William W Backus HospitalNorwich, CTHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Hartford Healthcare Medical Group Inc1153573902220
Hospital Medicine Associates Llc9234156985159

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 Warren Lewis Fields allows following entities to bill medicare on his behalf.
Entity NameIpc Hospitalists Of New England Pc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1821401761
PECOS PAC ID: 7618051442
Enrollment ID: O20091221000423
Entity NameHartford Healthcare Medical Group Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1043561301
PECOS PAC ID: 1153573902
Enrollment ID: O20121201000007
Entity NameHospital Medicine Associates Llc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1093758781
PECOS PAC ID: 9234156985
Enrollment ID: O20170802002619

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 Warren Lewis Fields 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 Warren Lewis Fields, MD
200 Sandy Hollow Rd,
Mystic, CT 06355-1720

Ph: (860) 572-8911
Dr Warren Lewis Fields, MD
200 Sandy Hollow Rd,
Mystic, CT 06355-1720

Ph: (860) 572-8911

Reviews and Comments


Internal Medicine Doctors in Mystic, CT

Dr. Sumeet Sanjeev Pawar, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 100 Perkins Farm Dr Ste 301, Mystic, CT 06355
Phone: 860-572-5400    
Mr. Edmund A P West, MD
Internal Medicine
Medicare: Medicare Enrolled
Practice Location: 56 Whitehall Ave, Rt 27, Mystic, CT 06355
Phone: 860-572-8282    Fax: 860-572-7445
Dr. Thomas March Blum, M.D.
Internal Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 200 Sandy Hollow Rd, Mystic, CT 06355
Phone: 860-572-8911    Fax: 860-572-7758
Dr. James David Scarles, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 200 Sandy Hollow Rd, Mystic, CT 06355
Phone: 860-572-8911    Fax: 860-572-7758
Dr. Adam F Niedelman, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 100 Perkins Farm Dr Ste 301, Mystic, CT 06355
Phone: 860-572-5400    
Dr. Howard Brensilver, M.D.
Internal Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 200 Sandy Hollow Rd, Mystic, CT 06355
Phone: 860-572-8911    Fax: 860-572-7758
Rosemary Catherine Bontempi, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 200 Sandy Hollow Rd, Mystic, CT 06355
Phone: 860-572-8911    Fax: 860-572-7758

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.