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GUILLERMO ALFREDO MENDOZA FONSECA M.D.
NPI 1285898288
General Practice in Oviedo, FL

Active since July 18, 2008PECOS EnrolledAccepts Medicare AssignmentCLIA 10D2157685 · Waiver
2572 W STATE ROAD 426 STE 3040, OVIEDO, FL 32765(407) 890-9748(407) 890-9819 Get Directions Write a Review

NPPES record last updated: March 7, 2023. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Mar 7, 2023, Jan 10, 2019, Dec 14, 2018 and 6 more (9 updates tracked since 2016).

About Guillermo Alfredo Mendoza Fonseca M.d. NPPES

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

GUILLERMO ALFREDO MENDOZA FONSECA M.D. (NPI 1285898288) is an individual general practice provider in Oviedo, Florida, licensed in Florida (ME117112) and active in the NPI registry since July 2008. He is enrolled in Medicare PECOS, holds a CLIA Waiver certificate valid through November 8, 2026, and is affiliated with Adventhealth Orlando.

NPPES Registry Identity

NPI1285898288
Entity TypeIndividualMale
Primary Taxonomy208D00000X
Provider Legal NameGUILLERMO ALFREDO MENDOZA FONSECACredential: M.D.
Location Address2572 W STATE ROAD 426 STE 3040Oviedo, FL 32765-8389
Mailing Address2572 W State Road 426 Ste 3040Oviedo, FL 32765-8389 · (407) 890-9748 · Fax (407) 890-9819
Phone(407) 890-9748
Fax(407) 890-9819
Sole ProprietorNo
Medical School CMSOtherGraduated 2001
Enumeration DateJuly 18, 2008
Last NPPES UpdateMarch 7, 20239 updates tracked since enumeration
✔ NPI 1285898288 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyGeneral PracticeAllopathic & Osteopathic Physicians
Taxonomy Code208D00000X
License✔ Licensed in FL · ME117112
Definition
A physician who specializes in the general practice of diagnosing, treating, and managing patients with a variety of illnesses and conditions. Source: National Uniform Claim Committee
Also ListedInternal MedicineTaxonomy 207R00000X · License ME117112 (FL), MD12761 (RI)
2572 W STATE ROAD 426 STE 3040, Oviedo, FL 32765
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Other Identifiers 2

OtherME117112FL · Medical License
Medicaid009890300FL

Accepted Insurance

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

Guillermo Alfredo Mendoza Fonseca 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 ID3072680115
PECOS Enrollment IDI20131028000665
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.

CLIA Laboratory Certificates CMS CLIA

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate of Waiver 10D2157685

Dr Guillermo Mendoza Int Med LLC · Oviedo, FL
Active · expires Nov 8, 2026
CLIA Number10D2157685
Laboratory TypePhysician Office
Certificate Effective DateNovember 9, 2024
Certificate Expiration DateNovember 8, 2026
Laboratory DirectorGuillermo Mendoza
Laboratory Phone(407) 890-9748
Laboratory LocationDr Guillermo Mendoza Int Med LLC2572 W State Rd 426 Suite 3040, Oviedo, FL 32765
CLIA data matches this NPI record on: Address Phone
This certificate is issued to a laboratory to perform only waived tests.

Areas of Expertise CMS Part B claims 10

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.

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.
243 services27 patients
Management using the results of remote vital sign monitoring per calendar month, first 20 minutes 99457
This service involves reviewing and managing your health data, which is remotely monitored and collected. Your vital signs like heart rate and blood pressure are tracked regularly throughout the month. The first 20 minutes of this data analysis per month is included in this service.
242 services22 patients
Remote monitoring of physiologic parameters, initial supply of devices with daily recordings or programmed alerts transmission, each 30 days 99454
This service involves using devices to remotely track body functions like heart rate or blood pressure. These devices, provided initially, record data daily or send alerts if readings are abnormal. The service is renewed every 30 days.
235 services22 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.
95 services57 patients
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.
65 services35 patients
Management using the results of remote vital sign monitoring per calendar month, each additional 20 minutes 99458
This service involves analyzing your vital signs, like heart rate and blood pressure, remotely collected over a month. Each additional 20 minutes spent on management refers to extra time spent reviewing, interpreting your data, and planning your care. It's a critical part of ensuring your wellbeing.
37 services16 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

Referred Medical Equipment & Supplies CMS DME claims

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

Nebulizer, with compressor E0570
DME-Other DME · category DE000N
1 supplier12 claims12 services$5.35 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

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

DR GUILLERMO MENDOZA - INT MED - LLC
General Practice
2572 W STATE ROAD 426 STE 3040
OVIEDO, FL 32765
Seminole County (407) 890-9748

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 Mendoza Fonseca's NPI number?

The NPI number for Guillermo Mendoza Fonseca is 1285898288. It was assigned to this individual provider in the NPPES registry on July 18, 2008.

Where is Guillermo Mendoza Fonseca located?

Guillermo Mendoza Fonseca practices at 2572 W State Road 426 Ste 3040, Oviedo, FL 32765. The listed phone number is (407) 890-9748.

What is Guillermo Mendoza Fonseca's specialty?

The primary specialty registered for this NPI is General Practice with taxonomy code 208D00000X.

Is Guillermo Mendoza Fonseca enrolled in Medicare?

Yes. Guillermo Mendoza Fonseca 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.

Does Guillermo Mendoza Fonseca hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 10D2157685) is associated with this NPI, valid through November 8, 2026. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

What insurance does Guillermo Mendoza Fonseca accept?

Health plans from Florida Blue (BlueCross BlueShield FL) list Guillermo Mendoza Fonseca 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 Mendoza Fonseca affiliated with any hospitals?

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

When was this NPI record last updated?

The NPPES record for Guillermo Mendoza Fonseca was last updated on March 7, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.