Doctor Profile
Grisel Mac Williams
Hialeah, FL 33013
Reviewed by: Wes Ward, Founder & Data Lead • View our methodology
Important: We are not affiliated with Medicare, CMS, or Grisel Mac Williams's practice. This page displays publicly available CMS data to help you research Medicare providers. We do not sell insurance or represent any insurance company. For official enrollment and complete plan information, visit Medicare.gov or call 1-800-MEDICARE.
Medicare Plans That Cover Dr. Mac Williams
See which plans Dr. Mac Williams accepts
We're pulling plan acceptance data directly from insurance carrier provider directories. Until that feed is live for Florida, the fastest way to find a Medicare plan that covers Dr. Mac Williams is to compare every Medicare Advantage and Part D plan available near 33013, FL — the Internal Medicine's office can quickly confirm which of the top local plans they accept.
Compare Medicare Plans near 33013, FL →What Dr. Mac Williams Does
Dr. Mac Williams served 100 Medicare patients across 468 services in the latest CMS reporting year. That's 89% below the average Internal Medicine in Florida (888 patients across 5,773 doctors).
| Procedure | Services | Medicare Patients |
|---|---|---|
| Established patient office or other outpatient visit, 30-39 minutes (99214) | 263 | 45 |
| Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month (99490) | 194 | 44 |
| Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439) | 11 | 11 |
How to read this: "Services" are the total times Dr. Mac Williams billed Medicare for each procedure in the latest reporting year. "Patients" counts unique Medicare beneficiaries. Procedures are shown in plain English; the underlying HCPCS codes are available on request.
Hospital Affiliations
CMS does not list any hospital affiliations for Dr. Mac Williams. This is common for office-based practitioners who don't admit patients to hospitals.
Practice Location & Telehealth Readiness
Dr. Mac Williams practices at the address below. If you're evaluating Medicare coverage, location matters for in-network access and — when Dr. Mac Williams offers telehealth — broadband availability at your home matters for virtual visits.
Address: 810 E 39TH PL, Hialeah, FL 33013
Phone:
Practice Accessibility
Average commute time in this zip · 80% of residents drive to work. Practical context for patients deciding whether to make the trip. See the full neighborhood profile at BestNeighborhood.org.
Telehealth Readiness
Households with fiber broadband — important for reliable virtual visits. Check your address at ISPReports.org.
Other Primary Care Doctors near 33013, FL
If Dr. Mac Williams isn't accepting new patients or isn't in your plan's network, these are the closest primary care doctors near 33013, FL:
| Doctor | Specialty | Medicare Patients / yr | Distance |
|---|---|---|---|
| Ana M. Penenori Montoto | Nurse Practitioner | 18 | <1 mi |
| Heliodoro Ruiz | General Practice | — | <1 mi |
| Yadira Blanco Labori | Nurse Practitioner | — | <1 mi |
| Joaquin F. Negrette | Internal Medicine | — | <1 mi |
| Juan M. Cancio | Internal Medicine | 412 | <1 mi |
| Manuel M. Garcia Frangie | Family Practice | 346 | <1 mi |
How to Use This Information
Choosing a Medicare plan that covers Dr. Mac Williams takes three steps:
- Verify network status. Medicare Advantage plans each have their own provider networks. The same doctor may be in-network for one plan and out-of-network for another. Compare all Medicare plans near 33013, FL →
- Confirm directly with the office. Call Dr. Mac Williams's office at to verify they're accepting new patients and which plans they currently accept. Use our printable question list →
- Check enrollment windows. You can only switch Medicare plans during specific periods. Missing a deadline can cost you a year of coverage. Review enrollment dates →
Grisel Mac Williams: Common Questions
Does Dr. Mac Williams accept Medicare?
Where is Dr. Mac Williams's office?
What Medicare plans does Dr. Mac Williams accept?
Does Dr. Mac Williams offer telehealth visits?
How experienced is Dr. Mac Williams?
How do I know if Dr. Mac Williams is in-network for my Medicare plan?
About the Reviewer
Wes Ward
Founder & Data Lead
Wes Ward reviews all doctor profiles and methodology for data accuracy. Every Medicare provider page on this site — including the utilization statistics, hospital affiliations, and geocoded practice address — goes through his data-validation pipeline before publication. We display only publicly available CMS data; you never need to enter personal information to see any of it.
With 25+ years in data analytics — including work with highly regulated genomic data at Ancestry.com — Wes brings enterprise-level rigor to healthcare transparency. He is also a co-founder of BestNeighborhood.org (neighborhood data), CrimeGrade.org (block-level safety analytics), and ISPReports.org (broadband availability for telehealth). Those sister sites power the location and telehealth-readiness context on this page.
View full profile → • LinkedIn
Data sources: CMS NPPES (2026), CMS Medicare Provider Utilization & Payment Data (2023), CMS Physician Compare, CrimeGrade.org, BestNeighborhood.org, ISPReports.org. This page is for informational purposes only. Always verify coverage directly with the plan and practice. Read our full methodology → • Privacy policy
Medicare Resources
Choosing the right Medicare plan involves more than just doctor coverage. These guides help you evaluate the full picture:
How to Choose a Medicare Plan
In-depth guide to plan types, Star Ratings, drug tiers, and costs.
Enrollment Checklist
Printable step-by-step guide to gather your info and enroll.
Enrollment Dates & Deadlines
Key periods, timelines, and penalty calculations.
Questions for Your Doctor
Printable list to discuss Medicare with Dr. Mac Williams or any physician.
Medicare Glossary
Definitions for 40+ complex Medicare terms.
Our Methodology
Learn how we source and verify CMS data for accuracy.
Medicare Plans for Conditions Treated by Primary Care Specialists
See which Medicare plans score highest for conditions commonly managed by this specialty in 33013, FL: