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Active NPI 1053396549 Individual Practitioner Female Practitioner

Dr. Grisel Mac Williams , MD

Internal Medicine • Hialeah, FL

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. Grisel Mac Williams, MD is a certified Internal Medicine practicing in Hialeah, FL. With approximately 46 years of clinical experience since completing medical education in 1980, Dr. Mac Williams delivers high-quality medical care to the local community at 810 E 39TH PL.

Dr. Mac Williams accepts Medicare assignment.

Frequently performed procedures and clinical services include established patient outpatient office visit, chronic care management services, first, annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

810 E 39th Pl

Hialeah, FL 330132863

Telephone 3056917018
Fax 3056915814
Associated Practice Facility / Clinic
🏢 Grisel Mac Williams Md Pa Facility NPI 1083910202

Medicare Profile & Education

Medical School

Other

Graduation Year

1980

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Internal Medicine in Hialeah, FL

Senior Veteran Specialist (>20 Yrs)
Practitioner Clinical Experience
46 Yrs +22.5 yrs vs City Avg
City Avg: 23.5 Yrs
State Avg: 26.5 Yrs
Regional Practice Density
146 Specialists

Practicing in Hialeah, FL (10650 Statewide)

Telehealth Adoption Rate
13.7% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount
31.2% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Mac Williams (46 Years) 46 Yrs
Hialeah Specialty Average (23.5 Years) 23.5 Yrs

Performed Procedures & Service Volume

Top Medicare Part B procedures performed by this practitioner

CMS Official Data (2024)
Reporting Year:
HCPCS Code & Description Services Patients Submitted Charge Medicare Allowed
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
176 35 $193.86 $134.36
99490 Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month
155 37 $120.00 $65.66
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more
35 19 $200.00 $190.41
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit
31 31 $250.00 $135.41

Medical Specialties & State Licenses

CMS Verified: 2021-01-08
Internal Medicine Primary Specialty

NUCC Taxonomy Code: 207R00000X

State License FL ME0045706

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

Specialist

NUCC Taxonomy Code: 174400000X

State License FL ME0045706

An individual educated and trained in an applied knowledge discipline used in the performance of work at a level requiring knowledge and skills beyond or apart from that provided by a general education or liberal arts degree.

Additional State Medicaid & Healthcare Payer Identifiers

Medicaid State Provider ID
047895400 (FL)

Practice Associates & Co-Workers

Healthcare professionals and specialists practicing at this location or sharing practice phone/fax

2 Associated Practitioners
Paula Williams , PA-C

Physician Assistant

NPI 1588005797

Physician Assistant (Certified)

Daylin Alfonso , FNP

Nurse Practitioner - Family

NPI 1891240370

Family Nurse Practitioner

Career & Practice History Timeline

Chronological log of verified NPI updates, location relocations, credentials, and registry changes

7 Historical Events
👤
Provider Name / Credentials Updated January 08, 2021

Recorded as GRISEL MAC WILLIAMS, MD

NPI Profile Active June 09, 2011

NPI status registered as active in NPPES database

📍
Updated Practice Location June 09, 2011

Registered at 810 E 39TH PL, HIALEAH, FL 330132863 (Tel: 3056917018)

📍
Updated Business Mailing Address June 09, 2011

Registered at 810 E 39 PL., HIALEAH, FL 33013 (Tel: 3056917018)

👤
Provider Name / Credentials Updated June 09, 2011

Recorded as GRISEL MACWILLIAMS, M.D.

🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) June 09, 2011

Specialist (License #ME0045706 in FL)

🟢
Initial NPI Registration & Enumeration December 07, 2005

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

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NPI Administrative Meta

NPI Number: 1053396549
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: December 07, 2005
Last Update: January 08, 2021
Sole Proprietor: No

Mailing Address

810 E 39 Pl.

Hialeah, FL 33013

Phone: 3056917018

Public Domain Record This profile contains public domain information published by CMS and NPPES under the Freedom of Information Act (FOIA).
⚠️ Medical Disclaimer

This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.