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MR. GUILLERMO MARRERO M.D.
NPI 1245211044
Internal Medicine in Oviedo, FL

Active since November 09, 2005PECOS EnrolledAccepts Medicare Assignment
1000 EXECUTIVE DR, SUITE 1, OVIEDO, FL 32765(407) 971-1970 Get Directions Write a Review

NPPES record last updated: September 22, 2010. Verified against the NPPES registry weekly; last sync: October 04, 2026.

About Mr. Guillermo Marrero M.d. NPPES

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

MR. GUILLERMO MARRERO M.D. (NPI 1245211044) is an individual internal medicine provider in Oviedo, Florida, licensed in Florida (ME0074991) and active in the NPI registry since November 2005. He is enrolled in Medicare PECOS, is affiliated with Adventhealth Orlando, and is a graduate of Other (1993).

NPPES Registry Identity

NPI1245211044
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameMR. GUILLERMO MARREROCredential: M.D.
Location Address1000 EXECUTIVE DR, SUITE 1Oviedo, FL 32765-8140
Mailing Address1000 Executive Dr, Suite 1Oviedo, FL 32765-8140 · (407) 971-1970
Phone(407) 971-1970
Sole ProprietorYes
Medical School CMSOtherGraduated 1993
Enumeration DateNovember 9, 2005
Last NPPES UpdateSeptember 22, 2010
✔ NPI 1245211044 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in FL · ME0074991
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.
1000 EXECUTIVE DR, Oviedo, FL 32765
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Other Identifiers 3

Medicare ID-Type Unspecified42768BFL
Medicaid26328 11 00FL
Medicare UPING65641FL

Accepted Insurance

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

Mr. Guillermo Marrero M.d. 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 ID7113182973
PECOS Enrollment IDI20120628000164
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 6

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 low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
434 services153 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.
153 services85 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.
99 services99 patients
Injection of drug or substance under skin or into muscle 96372
This procedure involves administering medication directly under the skin or into a muscle. A small needle is used to inject the drug, allowing it to be absorbed quickly into the bloodstream. It's a common method for delivering a variety of medications.
69 services36 patients
Injection, ketorolac tromethamine, per 15 mg J1885
Ketorolac tromethamine is a medication administered through injection, often used to manage moderate to severe pain. Each 15 mg dose helps to reduce hormones causing inflammation and pain in the body. It is not recommended for long-term use.
46 services14 patients
Injection, vitamin b-12 cyanocobalamin, up to 1000 mcg J3420
This is a procedure where a small dose of Vitamin B-12, also known as Cyanocobalamin, is injected into your body. This vitamin is essential for nerve function and the production of red blood cells. It's often used to treat vitamin B-12 deficiency.
39 services21 patients

Hospital Affiliations CMS Care Compare

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

Adventhealth Orlando

Acute Care Hospitals · Orlando, FL
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number100007
Location601 E Rollins StOrlando, FL 32803 · Orange County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 32765 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
$130.04 typical visit price
range $56.00 – $171.84
Typical copayment $32.51 (range $14.00 – $42.96)
Most-billed visit code 99204
Established Patient
$99.16 typical visit price
range $17.57 – $139.16
Typical copayment $24.79 (range $4.39 – $34.79)
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 4

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
10 suppliers32 claims119 services$6.72 avg. paid by Medicare
Normal, low and high calibrator solution / chips A4256
DME-Other DME · category DE000N
1 supplier12 claims12 services$2.94 avg. paid by Medicare
Lancets, per box of 100 A4259
DME-Medical/Surgical Supplies · category DA000N
7 suppliers19 claims53 services$1.20 avg. paid by Medicare
Supply allowance for therapeutic continuous glucose monitor (cgm), includes all supplies and accessories, 1 month supply = 1 unit of service K0553
DME-Other DME · category DE017N
2 suppliers14 claims14 services$210.34 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 9

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

TROY L. KING, D.D.S., P.A.
Dentist (Pediatric Dentistry)
1000 EXECUTIVE DR, SUITE 8
OVIEDO, FL 32765
Seminole County (407) 977-9990
MR. JOSEPH S SALG LMHC
Counselor (Mental Health)
1000 EXECUTIVE DR, SUITE 9
OVIEDO, FL 32765
Seminole County (407) 716-7207
22 HEALTH GROUP, LLC
Chiropractor
1000 EXECUTIVE DR, SUITE 4
OVIEDO, FL 32765
Seminole County (407) 542-8895
GUILLERMO MARRERO MD PA
Internal Medicine
1000 EXECUTIVE DR, SUITE 1
OVIEDO, FL 32765
Seminole County (407) 971-1970
MCW MD- RESILIENCE COUNSELING LLC
Counselor (Mental Health)
1000 EXECUTIVE DR, SUITE 7
OVIEDO, FL 32765
Seminole County (407) 977-4335
MR. JEAN PATRICK FLORESTAL L M T
Massage Therapist
1000 EXECUTIVE DR
OVIEDO, FL 32765
Seminole County (407) 971-6830
CENTRAL FL REG OBSTETRICS AND GYNECOLOGY, LLC
Obstetrics & Gynecology
1000 EXECUTIVE DR, SUITE 3
OVIEDO, FL 32765
Seminole County (407) 365-2929
DAVID TEITELBAUM MD PA
Obstetrics & Gynecology
1000 EXECUTIVE DR, SUITE 5
OVIEDO, FL 32765
Seminole County (407) 365-2929

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 Marrero's NPI number?

The NPI number for Guillermo Marrero is 1245211044. It was assigned to this individual provider in the NPPES registry on November 9, 2005.

Where is Guillermo Marrero located?

Guillermo Marrero practices at 1000 Executive Dr Suite 1, Oviedo, FL 32765. The listed phone number is (407) 971-1970.

What is Guillermo Marrero's specialty?

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

Is Guillermo Marrero enrolled in Medicare?

Yes. Guillermo Marrero 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 Guillermo Marrero accept?

Health plans from Florida Blue (BlueCross BlueShield FL) and Florida Blue HMO (a BlueCross BlueShield FL company) list Guillermo Marrero 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 Marrero affiliated with any hospitals?

According to CMS data, Guillermo Marrero is affiliated with Adventhealth Orlando.

When was this NPI record last updated?

The NPPES record for Guillermo Marrero was last updated on September 22, 2010. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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.