Mark Williams, MD
NPI 1770558702 · Nephrology Physician · Winter Park, FL
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Williams, MD is a Nephrology Physician provider in Winter Park, FL (NPI 1770558702).
Provider details
- NPI number
- 1770558702
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- ME54570 (FL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 7 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Dapagliflozin Propanediolbrand: Farxiga | 75 | 25 |
| Empagliflozinbrand: Jardiance | 56 | 17 |
| Losartan Potassium | 19 | — |
| Finerenonebrand: Kerendia | 18 | — |
| Calcitriol | 14 | — |
| Doxazosin Mesylate | 14 | — |
| Allopurinol | 12 |
Practice location
Mailing address
Additional practice locations (1)
- 3885 Oakwater CirOrlando, FL 32806-6257Phone: (407) 816-5700Fax: (407) 812-6766
Registry dates
- Enumerated
- 2006-02-22
- Last updated
- 2022-11-07
- Certified
- 2022-11-07
Frequently asked questions
- What is Mark Williams's NPI number?
- Mark Williams's National Provider Identifier (NPI) is 1770558702, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Williams's specialty?
- Mark Williams is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Williams located?
- Mark Williams's practice location on file with NPPES is 3727 N Goldenrod Rd Ste 105, Winter Park, FL 32792-8611.
- What is Mark Williams's phone number?
- The practice phone number listed in the NPPES registry for Mark Williams is (407) 657-0296.
- Does Mark Williams accept Medicare?
- Mark Williams is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Williams's NPI active?
- Yes — Mark Williams's NPI (1770558702) is active in the NPPES registry as of the last update on 2022-11-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.