GUILLERMO N ALONSO MD
NPI 1336120708
Legal Medicine in Miami, FL

Q: What is Guillermo Alonso's NPI number?

The NPI number for Guillermo Alonso is 1336120708. It was assigned to this individual provider in the NPPES registry on November 10, 2005.

Q: What is Guillermo Alonso's specialty?

The primary specialty registered for this NPI is Legal Medicine with taxonomy code 173000000X.

Q: When was this NPI record last updated?

The NPPES record for Guillermo Alonso was last updated on January 7, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 months 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.

Active since November 10, 2005PECOS EnrolledAccepts Medicare Assignment

8000 W FLAGLER ST STE 206, MIAMI, FL 33144(786) 703-1620(786) 709-1619 Get Directions Write a Review

NPPES record last updated: January 7, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jan 7, 2026, Sep 10, 2024 (2 updates tracked since 2024).

On this page

About Guillermo N Alonso Md NPPES

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

GUILLERMO N ALONSO MD (NPI 1336120708) is an individual legal medicine provider in Miami, Florida, licensed in Florida (ME56063) and active in the NPI registry since November 2005. He is enrolled in Medicare PECOS, is affiliated with Steward Coral Gables Hospital, and maintains a secondary practice location in Miami.

NPPES Registry Identity

NPI1336120708

Entity TypeIndividualMale

Primary Taxonomy173000000X

Provider Legal NameGUILLERMO N ALONSOCredential: MD

Location Address8000 W FLAGLER ST STE 206Miami, FL 33144-2153

Mailing Address3441 Sw 134 CourtMiami, FL 33175-6944 · (305) 227-5582 · Fax (305) 227-4133

Phone(786) 703-1620

Fax(786) 709-1619

Sole ProprietorYes

Medical School CMSOtherGraduated 1983

Enumeration DateNovember 10, 2005

Last NPPES UpdateJanuary 7, 20262 updates tracked since enumeration

NPPES CertifiedJanuary 7, 2026

✔ NPI 1336120708 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyLegal MedicineOther Service Providers

Taxonomy Code173000000X

License✔ Licensed in FL · ME56063

Definition

The specialty areas of medicine concerned with matters of, and relations with, substantive law and legal institutions; such as the conduct of medical examinations at crime scenes, performance of autopsies, giving of expert medical testimony in judicial proceedings, medical treatment of inmates of penal institutions, the practice of trauma medicine in law enforcement settings, and other clinical practice and medical science applications in the fields of law, law enforcement, and corrections.

8000 W FLAGLER ST STE 206, Miami, FL 33144

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Secondary Practice Location 1

Location 112700 SW 128th StMiami, FL 33186-5377 · Phone (305) 278-7579

Other Identifiers 1

Medicaid051636800FL

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter Health, Ambetter of Alabama, AmeriHealth Caritas Next and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Guillermo N Alonso 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 ID5092812206

PECOS Enrollment IDI20070523000472

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.

Medicare Billing Reassignments

Medicare enrollment records show Guillermo Alonso reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

G & G Medical Center Inc

Same address

Family Medicine

8000 W FLAGLER ST STE 206
Miami, FL 33144

Reassigned Medicare billing, Florida enrollment
6 clinicians in this Medicare group

NPI 1205252376 (786) 703-9779

Ultimate Medical Center & Spa LLC

9.5 mi

General Practice

12700 SW 128TH ST STE 205
Miami, FL 33186

Reassigned Medicare billing, Florida enrollment

NPI 1023663259 (305) 278-7579

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 19

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.

Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes 99309

A follow-up nursing facility visit per day is a daily check-in by a healthcare professional. This 25-minute visit typically involves monitoring your health progress, addressing any concerns, and adjusting treatment plans as necessary. It's a vital part of ensuring your ongoing wellbeing.

979 services37 patients

Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, 20 minutes or more 99308

A follow-up nursing facility visit per day is a daily check-up service provided by healthcare professionals. It lasts around 15 minutes and involves assessing your health status, monitoring your recovery progress, and addressing any concerns you may have about your health or treatment.

520 services32 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

268 services30 patients

Residence visit for established patient with high level of medical decision making, per day, if using time, at least 60 minutes 99350

An established patient home visit is a service where a healthcare professional visits a patient's home for a check-up or treatment. The visit typically lasts for about an hour. This service is especially beneficial for patients who may have difficulty traveling to a healthcare facility.

182 services38 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233

Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.

141 services22 patients

Residence visit for established patient with moderate level of medical decision making, per day, if using time, at least 40 minutes 99349

An established patient home visit is a medical appointment conducted at your home, typically lasting around 40 minutes. This service is ideal for patients who may find it difficult to travel to a healthcare facility. During this visit, a healthcare professional will evaluate your health status, manage your care, and answer any health-related questions you may have.

118 services35 patients

Advance care planning, first 30 minutes 99497

Advance care planning is a process where you discuss your healthcare preferences with your doctor. This conversation, lasting up to 30 minutes, helps ensure your wishes are respected if you're unable to communicate them in the future. It's about your care, your way.

79 services34 patients

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.

70 services19 patients

Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222

Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.

38 services27 patients

Hospital discharge day management, more than 30 minutes 99239

Hospital discharge day management over 30 minutes involves a detailed process to ensure a smooth transition from hospital to home. It includes final examinations, discussion of your hospital stay, post-discharge instructions, and coordinating follow-up care.

31 services23 patients

X-ray of upper spine, 2-3 views 72040

An X-ray of the upper spine, with 2-3 views, is a painless procedure that employs a small amount of radiation to capture images of your neck and upper back. It assists in diagnosing conditions like arthritis, fractures, or spinal deformities.

30 services29 patients

X-ray of knee, 1-2 views 73560

An X-ray of the knee with 1-2 views is a quick, painless test that produces images of the knee bones. It helps identify fractures, infections, or changes in the knee joint. During the procedure, you'll be asked to stay still while the X-ray machine captures the images.

28 services18 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.

27 services27 patients

X-ray of lower and sacral spine, 2-3 views 72100

An X-ray of the lower and sacral spine involves capturing images of your lower back area, including the tailbone. This procedure helps in identifying problems like fractures, infections, or deformities. 2-3 different angle views provide a comprehensive picture.

23 services23 patients

Advance care planning, first 30 minutes 99497

23 services23 patients

Nursing facility discharge management, more than 30 minutes 99316

Nursing facility discharge management over 30 minutes is a comprehensive process where a healthcare team prepares you for leaving the facility. It involves creating a tailored plan, coordinating care, and ensuring a smooth transition to your next care setting.

21 services18 patients

Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223

Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.

16 services13 patients

Initial nursing facility care with high level of medical decision making, per day, if using time, 50 minutes or more 99306

An initial nursing facility visit is your first meeting with your healthcare team at a nursing facility. Lasting typically 45 minutes, this appointment involves a comprehensive health assessment and the creation of your personalized care plan. It's a crucial step to ensure your health and well-being.

16 services12 patients

Initial nursing facility care with moderate level of medical decision making, per day, if using time, at least 35 minutes 99305

An initial nursing facility visit per day is a service where a healthcare professional spends about 35 minutes assessing a patient's health status. This includes reviewing medical history, conducting a physical exam, and developing a care plan based on the patient's needs.

13 services13 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Steward Coral Gables Hospital

Acute Care Hospitals · Coral Gables, FL

3/5 CMS rating

OwnershipProprietary

CMS Certification Number100183

Location3100 Douglas RdCoral Gables, FL 33134 · Miami-Dade County

Emergency services

Referred Medical Equipment & Supplies CMS DME claims 6

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

Enteral feeding supply kit; pump fed, per day, includes but not limited to feeding/flushing syringe, administration set tubing, dressings, tape B4035

Other-Enteral and Parenteral · category OB006N

2 suppliers68 claims1,473 services$4.76 avg. paid by Medicare

Enteral formula, nutritionally complete, calorically dense (equal to or greater than 1.5 kcal/ml) with intact nutrients, includes proteins, fats, carbohydrates, vitamins and minerals, may include fiber, administered through an enteral feeding tube, 100 calories = 1 unit B4152

Other-Enteral and Parenteral · category OB006N

2 suppliers69 claims23,868 services$0.26 avg. paid by Medicare

Hospital bed, semi-electric (head and foot adjustment), with any type side rails, with mattress E0260

DME-Hospital Beds · category DB000N

1 supplier22 claims22 services$42.92 avg. paid by Medicare

Ipratropium bromide, inhalation solution, fda-approved final product, non-compounded, administered through dme, unit dose form, per milligram J7644

DME-Drugs Administered Through DME · category DG006N

4 suppliers11 claims554 services$0.16 avg. paid by Medicare

Standard wheelchair K0001

DME-Wheelchairs · category DD000N

1 supplier16 claims16 services$8.89 avg. paid by Medicare

Pharmacy dispensing fee for inhalation drug(s); per 30 days Q0513

DME-Other DME · category DE000N

5 suppliers15 claims15 services$20.93 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 3

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

G & G MEDICAL CENTER INC

Family Medicine

8000 W FLAGLER ST STE 206
MIAMI, FL 33144

Miami-Dade County (786) 703-9779

G & G MEDICAL CENTER INC

Community/Behavioral Health

8000 W FLAGLER ST STE 206
MIAMI, FL 33144

Miami-Dade County (786) 703-9779

MELYANET MANAGEMENT LLC

Nurse Practitioner (Family)

8000 W FLAGLER ST STE 206
MIAMI, FL 33144

Miami-Dade County (786) 703-9779

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 Guillermo Alonso's NPI number?

The NPI number for Guillermo Alonso is 1336120708. It was assigned to this individual provider in the NPPES registry on November 10, 2005.

Where is Guillermo Alonso located?

Guillermo Alonso practices at 8000 W Flagler St Ste 206, Miami, FL 33144. The listed phone number is (786) 703-1620.

What is Guillermo Alonso's specialty?

The primary specialty registered for this NPI is Legal Medicine with taxonomy code 173000000X.

Is Guillermo Alonso enrolled in Medicare?

Yes. Guillermo Alonso 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.

Which organizations bill Medicare for Guillermo Alonso's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Guillermo Alonso reassigns Medicare benefits to 2 organizations: G & G Medical Center Inc (Miami, FL) and Ultimate Medical Center & Spa LLC (Miami, FL). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Guillermo Alonso's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Guillermo Alonso accept?

Health plans from Ambetter Health, Ambetter of Alabama, AmeriHealth Caritas Next, Florida Blue (BlueCross BlueShield FL) and Florida Blue HMO (a BlueCross BlueShield FL company) and 1 other insurer list Guillermo Alonso 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.

Is Guillermo Alonso affiliated with any hospitals?

According to CMS data, Guillermo Alonso is affiliated with Steward Coral Gables Hospital.

When was this NPI record last updated?

The NPPES record for Guillermo Alonso was last updated on January 7, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 months 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.