Grisel Mac Williams, MD
Internal Medicine Physician · Hialeah, FL
Grisel Mac Williams, MD is an internal medicine physician with a practice address in Hialeah, Florida, and NPI 1053396549, issued on Dec 7, 2005. Check the license (Florida ME0045706, as entered in NPPES) on the Florida health license search; the Medicare figures below come from public CMS files.
- Name
- Grisel Mac Williams
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- ME0045706 FL
Self-reported in NPPES; status is on the state search - Practice location
- 810 E 39TH PL, Hialeah, FL 33013
- Phone
- (305) 691-7018
- Enumerated
- Dec 7, 2005
- Record last updated
- Jan 8, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (305) 691-5814
- Medicaid ID
- 047895400 FL
- Medicare enrollment
- Enrolled (PECOS I20110714000543); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 10,151 in Florida → Look up another NPI →
Also registered at 810 E 39TH PL
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Daylin Alfonso, FNPFamily Nurse Practitioner1891240370
Verify Grisel Mac Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersFlorida health license search
Search for license ME0045706Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.1 times the Medicare Part D claims of the average internal medicine physician in 2024
6,756 Medicare Part D claims for 343 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims. 15 claims were for opioids.
Most prescribed
- Rosuvastatin Calcium305 claims
- Losartan Potassium263 claims
- Metoprolol Succinate255 claims
- Metformin Hcl176 claims
- Famotidine166 claims
- Prednisone163 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $481.15
21 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Grisel Mac Williams among 10,151 internal medicine physician records in Florida
Grisel Mac Williams, MD is one of 10,151 internal medicine physician records with a practice address in Florida. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 90% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 65% of these records are
- Graduated1980 · median 2004 among the 6,606 with a school on file
- Record last updated2021 · 48% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Florida practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
139 internal medicine physician records list a practice address in Hialeah
They are 139 of the 10,443 NPPES records with a practice address in Hialeah, and 10,151 internal medicine physician records in Florida.
All 10,151 in Florida → Every provider in Hialeah → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Manuel Aran, MDHialeah, FL 330131770593949
- Jose Baca, MDHialeah, FL 330131558308783
- Juan Cancio, M.D.Hialeah, FL 330131366463796
- Gloria CasalHialeah, FL 330131891721049
- Marcio Ferez, MDHialeah, FL 330131083627673
- Rossana Lopez, M.D.Hialeah, FL 330131326159385
- Marietta Miralles-Bouza, MDHialeah, FL 330131548375033
- Maria MolinaHialeah, FL 330131750311700
Common questions
What is Grisel Mac Williams, MD's NPI number?
Grisel Mac Williams, MD's National Provider Identifier (NPI) is 1053396549, issued on Dec 7, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Grisel Mac Williams, MD located?
The NPPES record lists a practice address at 810 E 39TH PL, Hialeah, FL, 33013. Phone: (305) 691-7018. Providers update this record themselves, so call before visiting.
How can I verify Grisel Mac Williams, MD's license?
NPPES lists Florida license number ME0045706, as entered by the provider. Search the Florida health license search at https://mqa-internet.doh.state.fl.us/mqasearchservices/healthcareproviders. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Grisel Mac Williams, MD prescribe under Medicare Part D?
In 2024, Grisel Mac Williams, MD had 6,756 Medicare Part D claims for 343 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.