Lewis A Sierra, MD - Internal Medicine in Fond Du Lac, WI

Lewis A Sierra, MD is a Internal Medicine physician based in Fond Du Lac, Wisconsin. Lewis A Sierra is licensed to practice in Wisconsin (license number 26876) and his current practice location is 145 N Main St, Fond Du Lac, Wisconsin. He can be reached at his office (for appointments etc.) via phone at (920) 926-8492.

NPI number for Lewis A Sierra is 1346222023 and his current mailing address is 420 E Division St, Fond Du Lac, Wisconsin. He does not participate in medicare program and thus does not accept medicare assignments. His NPI Number is 1346222023.

Contact Information

Lewis A Sierra, MD
145 N Main St,
Fond Du Lac, WI 54935-3423
(920) 926-8492
Not Available

Map and Direction




Physician's Profile

Full NameLewis A Sierra
GenderMale
SpecialityInternal Medicine
Location145 N Main St, Fond Du Lac, Wisconsin
Accepts Medicare AssignmentsDoes not participate in Medicare Program. He may not accept medicare assignment.
  NPI Data:
  • NPI Number: 1346222023
  • Provider Enumeration Date: 11/17/2005
  • Last Update Date: 04/09/2010

Medical Identifiers

Medical identifiers for Lewis A Sierra such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1346222023NPI-NPPES
13288OtherWVDEAN
930118899OtherWIRAILROAD MEDICARE
30649400MedicaidWI

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207P00000XEmergency Medicine 26876 (Wisconsin)Secondary
207R00000XInternal Medicine 26876 (Wisconsin)Primary

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. Lewis A Sierra is NOT enrolled with medicare and thus cannot prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
Lewis A Sierra, MD
420 E Division St,
Fond Du Lac, WI 54935-4560

Ph: (920) 926-8340
Lewis A Sierra, MD
145 N Main St,
Fond Du Lac, WI 54935-3423

Ph: (920) 926-8492

Reviews and Comments


Internal Medicine Doctors in Fond Du Lac, WI

Balvindar S Sareen, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 430 E Division St, Fond Du Lac, WI 54935
Phone: 315-637-7800    Fax: 315-637-7808
Jay R Muller, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 420 E Division St, Fond Du Lac, WI 54935
Phone: 920-926-8420    Fax: 920-926-8913
Dana I Vasquez, MD
Internal Medicine
Medicare: Medicare Enrolled
Practice Location: 420 E Division St, Fond Du Lac, WI 54935
Phone: 920-926-8420    
Adam P Karewicz, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 420 E Division St, Fond Du Lac, WI 54935
Phone: 920-926-8420    
Punit Kumar, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 420 E Division St, Fond Du Lac Regional Clinic, Fond Du Lac, WI 54935
Phone: 920-926-8420    
Dr. Steven Gregory Meress, MD
Internal Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 180 Knights Way, Fond Du Lac, WI 54935
Phone: 920-922-5433    Fax: 920-273-0480
Dr. Crystal J Kleiber Balderrama, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 420 E Division St, Fond Du Lac, WI 54935
Phone: 920-926-8340    Fax: 414-805-6851

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.