Dr Mark Williams, MD - Medicare Internal Medicine in Winter Park, FL

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Dr Mark Williams, MD is a medicare enrolled "Internal Medicine - Nephrology" physician in Winter Park, Florida. His current practice location is 3727 N Goldenrod Rd Ste 105, Winter Park, Florida. You can reach out to his office (for appointments etc.) via phone at (407) 657-0296.

Dr Mark Williams is licensed to practice in Florida (license number ME54570) and he also participates in the medicare program. He does not accept medicare assignments directly but he may accept medicare through third-party (refer to Reassignment section below) and may also prescribe medicare part D drugs. His NPI Number is 1770558702.

Contact Information

Dr Mark Williams, MD
3727 N Goldenrod Rd Ste 105,
Winter Park, FL 32792-8611
(407) 657-0296
Not Available

Map and Direction




Physician's Profile

Full NameDr Mark Williams
GenderMale
SpecialityInternal Medicine - Nephrology
Location3727 N Goldenrod Rd Ste 105, Winter Park, Florida
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1770558702
  • Provider Enumeration Date: 02/22/2006
  • Last Update Date: 11/07/2022
  Medicare PECOS Information:
  • PECOS PAC ID: 8224948625
  • Enrollment ID: I20100626000153

Medical Identifiers

Medical identifiers for Dr Mark Williams such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1770558702NPI-NPPES
08545OtherFLBC/BS
3100042OtherFLUNITED HEALTHCARE
0624921OtherFLAETNA
061510200MedicaidFL

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RN0300XInternal Medicine - Nephrology ME54570 (Florida)Primary

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 NameNephrology Associates of Central Florida, P.A.
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1346297173
PECOS PAC ID: 2567359375
Enrollment ID: O20040304000307
Entity NameCentral Florida Kidney Specialists Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1346954138
PECOS PAC ID: 6608233705
Enrollment ID: O20230606000195

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, MD
3885 Oakwater Cir,
Orlando, FL 32806-6257

Ph: (407) 816-5700		Dr Mark Williams, MD
3727 N Goldenrod Rd Ste 105,
Winter Park, FL 32792-8611

Ph: (407) 657-0296

Reviews and Comments


Internal Medicine Doctors in Winter Park, FL

Dr. Rajesh Sehgal, MD
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Phone: 407-898-5452    Fax: 844-722-1185
Dr. Matthew K Mcalister Ii, D.O.
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Dr. Sanah Ehsan Rana, M.D.
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Practice Location: 1573 W Fairbanks Ave Ste 210, Winter Park, FL 32789
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George Manny Abreut, DO
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Practice Location: 1605 W Fairbanks Ave, Winter Park, FL 32789
Phone: 407-845-8356    
Dr. Alexandra Lackey, MD
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Phone: 407-845-8356    
Dr. Nicholo J. Sartor, MD
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Practice Location: 1801 Lee Rd Ste 165, Winter Park, FL 32789
Phone: 407-975-0410    Fax: 407-975-0413

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.