DR. GRISEL MAC WILLIAMS MD
NPI 1053396549
Internal Medicine in Hialeah, FL

Q: What is Grisel Mac Williams's NPI number?

The NPI number for Grisel Mac Williams is 1053396549. It was assigned to this individual provider in the NPPES registry on December 7, 2005.

Q: What is Grisel Mac Williams's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Active since December 07, 2005PECOS EnrolledAccepts Medicare Assignment

810 E 39TH PL, HIALEAH, FL 33013(305) 691-7018(305) 691-5814 Get Directions Write a Review

NPPES record last updated: January 8, 2021. Verified against the NPPES registry weekly; last sync: August 02, 2026.

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About Dr. Grisel Mac Williams Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. GRISEL MAC WILLIAMS MD (NPI 1053396549) is an individual internal medicine provider in Hialeah, Florida, licensed in Florida (ME0045706) and active in the NPI registry since December 2005. She is enrolled in Medicare PECOS and is a graduate of Other (1980).

NPPES Registry Identity

NPI1053396549

Entity TypeIndividualFemale

Primary Taxonomy207R00000X

Provider Legal NameDR. GRISEL MAC WILLIAMSCredential: MD

Location Address810 E 39TH PLHialeah, FL 33013-2863

Mailing Address810 E 39 Pl.Hialeah, FL 33013 · (305) 691-7018 · Fax (305) 691-5814

Phone(305) 691-7018

Fax(305) 691-5814

Sole ProprietorNo

Medical School CMSOtherGraduated 1980

Enumeration DateDecember 7, 2005

Last NPPES UpdateJanuary 8, 2021

NPPES CertifiedJanuary 8, 2021

✔ NPI 1053396549 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207R00000X

License✔ Licensed in FL · ME0045706

Definition

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.

Also ListedSpecialistTaxonomy 174400000X · License ME0045706 (FL)

810 E 39TH PL, Hialeah, FL 33013

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Other Identifiers 1

Medicaid047895400FL

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include AvMed, Florida Blue (BlueCross BlueShield FL), Florida Blue HMO (a BlueCross BlueShield FL company) and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Grisel Mac Williams Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID7315125465

PECOS Enrollment IDI20110714000543

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 4

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

176 services35 patients

Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month 99490

Chronic care management services involve a healthcare professional directing clinical staff in managing your chronic conditions. This includes the first 20 minutes per month of services like medication management, care coordination, and health monitoring to help improve your health and quality of life.

155 services37 patients

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215

This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.

35 services19 patients

Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439

An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.

31 services31 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 33013 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$141.56 typical visit price

range $60.92 – $187.05

Typical copayment $35.39 (range $15.23 – $46.76)

Most-billed visit code 99204

Established Patient

$107.17 typical visit price

range $18.99 – $150.24

Typical copayment $26.79 (range $4.74 – $37.56)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Referred Medical Equipment & Supplies CMS DME claims 3

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253

DME-Other DME · category DE017N

7 suppliers28 claims108 services$7.09 avg. paid by Medicare

Normal, low and high calibrator solution / chips A4256

DME-Other DME · category DE000N

2 suppliers16 claims16 services$2.93 avg. paid by Medicare

Lancets, per box of 100 A4259

DME-Medical/Surgical Supplies · category DA000N

3 suppliers17 claims37 services$1.23 avg. paid by Medicare

Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 2

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

GRISEL MAC WILLIAMS MD PA

Internal Medicine

810 E 39TH PL
HIALEAH, FL 33013

Miami-Dade County (305) 691-7018

DAYLIN ALFONSO FNP

Nurse Practitioner (Family)

810 E 39TH PL
HIALEAH, FL 33013

Miami-Dade County (305) 691-7018

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Grisel Mac Williams's NPI number?

The NPI number for Grisel Mac Williams is 1053396549. It was assigned to this individual provider in the NPPES registry on December 7, 2005.

Where is Grisel Mac Williams located?

Grisel Mac Williams practices at 810 E 39th Pl, Hialeah, FL 33013. The listed phone number is (305) 691-7018.

What is Grisel Mac Williams's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Grisel Mac Williams enrolled in Medicare?

Yes. Grisel Mac Williams is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does Grisel Mac Williams accept?

Health plans from AvMed, Florida Blue (BlueCross BlueShield FL), Florida Blue HMO (a BlueCross BlueShield FL company) and Oscar Health Maintenance Organization of Florida list Grisel Mac Williams as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Grisel Mac Williams was last updated on January 8, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.