Dr. Guillermo Alfredo Mendoza Fonseca, MD
- Medicare services, 2024
- 1,011
- Medicare patients, 2024
- 76
- Part D claims, 2024
- 5,435
- Hospital affiliations
- 1
- Industry payments
- $5,107
- Practice address
- 2572 W Sr 426, Oviedo, FL 32765
- Practice phone
- Call (407) 890-9748
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Dr Guillermo Mendoza - Int Med -
Oviedo, Florida
Find Dr. Mendoza Fonseca's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Guillermo Alfredo Mendoza Fonseca is a general practice physician in Oviedo, Florida
Dr. Mendoza Fonseca practices at Dr Guillermo Mendoza - Int Med - in Oviedo, Florida.
Dr. Mendoza Fonseca's NPI, 1285898288, was assigned on July 18, 2008. Dr. Mendoza Fonseca graduated from Pontifical Xavierian University in 2001. Dr. Mendoza Fonseca holds Florida license ME117112.
- NPI
- 1285898288NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3072680115
- NPI enumeration date
- July 18, 2008
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (407) 890-9748
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 51
- Medical school graduation
- 2001
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Guillermo Alfredo Mendoza Fonseca practices at Dr Guillermo Mendoza - Int Med - in Oviedo, Florida
Dr. Mendoza Fonseca's primary practice is Dr Guillermo Mendoza - Int Med -, at 2572 W Sr 426, Oviedo, FL 32765 in Seminole County. The practice phone is (407) 890-9748.
- Dr Guillermo Mendoza - Int Med -2572 W Sr 426, Oviedo, FL 32765 · Seminole CountyPhone(407) 890-9748
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Guillermo Alfredo Mendoza Fonseca is affiliated with 6 sites of care and 2 medical groups
Dr. Mendoza Fonseca's primary practice is Dr Guillermo Mendoza - Int Med - in Oviedo, Florida. Dr. Mendoza Fonseca is also affiliated with AdventHealth Orlando. The medical group on file is Ability Rehabilitation. Dmand AI also links Dr. Mendoza Fonseca to 2 more group practices and clinics, 1 physician office, 1 home health agency and 1 medical group, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Guillermo Alfredo Mendoza Fonseca's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Mendoza Fonseca practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dr Guillermo Mendoza - Int Med - | Available with a free account |
| +5 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across each health system and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Guillermo Alfredo Mendoza Fonseca is one of 1,706 general practice physicians in Florida
General practice is Dr. Mendoza Fonseca's primary specialty in the NPI Registry, under taxonomy code 208D00000X. Dmand AI has Dr. Mendoza Fonseca's licenses on file in 2 states: Florida and Rhode Island.
Specialties and state licenses
- General practice, FloridaPrimary
- Rhode Island license
Clinical focus
Dmand AI lists acute mini-stroke (TIA), acute sinusitis, acute skin infection, anxiety, atrial fibrillation and flutter, bronchitis, bursitis and chronic anemia among the conditions Dr. Mendoza Fonseca treats.
General practice physicians near Dr. Mendoza Fonseca
Counts of general practice physicians with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Guillermo Alfredo Mendoza Fonseca billed Medicare for 1,011 services in 2024
CMS data shows 1,011 Medicare services from Dr. Mendoza Fonseca across 10 procedure codes in 2024, for 76 Medicare patients. Medicare paid $47,654 for them. Every service was in an office.
Dr. Mendoza Fonseca's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1,0042024: 9812%
- Other services
- 2023: 212024: 3043%
- Drugs given in the office
- 2023: 182024: 0100%
- Tests and treatments
- 2023: 392024: 0100%
Dr. Mendoza Fonseca compared with the Florida median for general practice physicians, 2024
- Dr. Mendoza Fonseca
- Florida median
- Medicare services
- 1,011vs 1029.9 times
- Medicare patients
- 76vs 4090% above
- Part D claims
- 4,793vs 1,5973.0 times
Medians across 1,557 general practice physicians in Florida with Dmand AI profiles that report each measure.
Dr. Mendoza Fonseca's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Mendoza Fonseca?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Mendoza Fonseca and other general practice physicians in Florida.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Guillermo Alfredo Mendoza Fonseca treated 76 Medicare patients in 2024, average age 74
CMS counts 76 Medicare patients who saw Dr. Mendoza Fonseca in 2024. The largest group is 65 to 74, with 30 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 22% are also on Medicaid. Their average risk score is 1.46, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Mendoza Fonseca's median patient age at 59, with 54% women.
Dr. Mendoza Fonseca's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Mendoza Fonseca's Medicare patients by sex, 2024
- Women4458%
- Men3242%
Chronic conditions among Dr. Mendoza Fonseca's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Diabetes51%
- Arthritis47%
- Chronic kidney disease45%
- Mood disorders38%
- Anxiety36%
- Depression36%
Share of Medicare patients with each condition. A patient can have several.
Dr. Mendoza Fonseca's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 59
Patient panel by sex, all payers
- Women54%
- Men45%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Guillermo Alfredo Mendoza Fonseca wrote 5,435 Medicare Part D claims in 2024
In 2024, Dr. Mendoza Fonseca wrote 5,435 Medicare Part D claims for 293 patients. 85% of them were for generic drugs. CMS names the drug for 4,793 of them, across 96 drugs with 11 or more claims each, at $428,566 in total drug cost. In 2023, CMS named 5,322 claims across 107 drugs.
Dr. Mendoza Fonseca's Part D claims by kind of drug, 2024
- Generic4,632 claims85%
- Brand-name758 claims14%
- Other45 claims1%
Dr. Mendoza Fonseca's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Mendoza Fonseca's Part D claims, 2024
- Opioids0%20 of 5,435 claims
- Antibiotics5%254 of 5,435 claims
- Antipsychotics, patients 65 and over0%16 of 5,435 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 5,3222024: 4,79310%
Drugs named by CMS: 96 in 2024, 107 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Guillermo Alfredo Mendoza Fonseca offers telehealth to Medicare patients
Dr. Mendoza Fonseca accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Mendoza Fonseca as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Guillermo Alfredo Mendoza Fonseca received $5,107 in industry payments from 2016 to 2025
CMS Open Payments shows 243 general payments to Dr. Mendoza Fonseca from 24 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. AstraZeneca Pharmaceuticals LP paid the most, $1,608.
General payments to Dr. Mendoza Fonseca by program year, 2016 to 2025
Companies that paid Dr. Mendoza Fonseca the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Guillermo Alfredo Mendoza Fonseca graduated from Pontifical Xavierian University
Dr. Mendoza Fonseca graduated from Pontifical Xavierian University in 2001.
- Medical school
Source: Dmand AI Professional Profile Data
Dr. Guillermo Alfredo Mendoza Fonseca accepts plans from 9 insurance carriers
Dr. Mendoza Fonseca is in network with 9 carriers, including Aetna, Elevance and United Healthcare. HMO plans come from the most carriers, 4. Check the plan with the practice before a visit.
- Aetna
- Elevance
- United Healthcare
- Aspirus Health Plan
- Blue Cross and Blue Shield of Kansas City
- CMS Medicare
- HCSC
- Humana
- +1 more carriersWith a free account
Plan types Dr. Mendoza Fonseca accepts, by number of carriers
- HMO4
- Medicare4
- POS4
- PPO4
- EPO3
- Medicaid1
Source: Dmand AI Insurance Network Data
Sources for Dr. Guillermo Alfredo Mendoza Fonseca's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Guillermo Alfredo Mendoza Fonseca
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Guillermo Alfredo Mendoza Fonseca's NPI number?
Dr. Guillermo Alfredo Mendoza Fonseca's NPI number is 1285898288. It was assigned on July 18, 2008, and it is active in the NPI Registry.
What kind of doctor is Dr. Guillermo Alfredo Mendoza Fonseca?
Dr. Guillermo Alfredo Mendoza Fonseca is a general practice physician in Oviedo, Florida. The primary specialty in the NPI Registry is General Practice Physician (taxonomy code 208D00000X).
Where does Dr. Guillermo Alfredo Mendoza Fonseca practice?
Dr. Mendoza Fonseca practices at 2572 W Sr 426, Oviedo, FL 32765. Dr. Mendoza Fonseca's primary practice is Dr Guillermo Mendoza - Int Med - in Oviedo, Florida. Dmand AI also links Dr. Mendoza Fonseca to 2 group practices and clinics, 1 physician office, 1 home health agency and 1 medical group.
What is Dr. Guillermo Alfredo Mendoza Fonseca's office phone number?
The practice phone on file for Dr. Mendoza Fonseca is (407) 890-9748.
What is Dr. Guillermo Alfredo Mendoza Fonseca's medical license number?
Dr. Mendoza Fonseca holds Florida license ME117112, one of the licenses on file in 2 states.
Which states has Dr. Guillermo Alfredo Mendoza Fonseca been licensed in?
Dmand AI has state licenses on file for Dr. Mendoza Fonseca in Florida (2013 to 2026) and Rhode Island (2008 to 2014).
Which hospitals is Dr. Guillermo Alfredo Mendoza Fonseca affiliated with?
Dr. Mendoza Fonseca is affiliated with AdventHealth Orlando.
What medical group is Dr. Guillermo Alfredo Mendoza Fonseca part of?
Dr. Mendoza Fonseca is linked to Ability Rehabilitation. Dmand AI links Dr. Mendoza Fonseca to 1 more medical group.
Does Dr. Guillermo Alfredo Mendoza Fonseca accept Medicare?
Yes. CMS data shows Dr. Mendoza Fonseca billed Medicare for 1,011 services in 2024, and Dr. Mendoza Fonseca accepts Medicare assignment.
Does Dr. Guillermo Alfredo Mendoza Fonseca offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Mendoza Fonseca as offering telehealth services.
Show 7 more questionsShow fewer questions
How many Medicare patients does Dr. Guillermo Alfredo Mendoza Fonseca see?
CMS counts 76 Medicare patients who saw Dr. Mendoza Fonseca in 2024, with an average age of 74.
What services does Dr. Guillermo Alfredo Mendoza Fonseca bill to Medicare?
In 2024, Dr. Mendoza Fonseca's most billed Medicare services were care management and other visits (99490), care management and other visits (99457) and care management and other visits (99454).
Where did Dr. Guillermo Alfredo Mendoza Fonseca go to medical school?
Dr. Mendoza Fonseca graduated from Pontifical Xavierian University in 2001.
What drugs does Dr. Guillermo Alfredo Mendoza Fonseca prescribe most?
In 2024 Medicare Part D data, Dr. Mendoza Fonseca's most prescribed drugs by claims were Atorvastatin Calcium, Prednisone and Levothyroxine Sodium.
Has Dr. Guillermo Alfredo Mendoza Fonseca received payments from drug or device companies?
CMS Open Payments shows $5,107 in general payments to Dr. Mendoza Fonseca from 24 companies from 2016 to 2025. The largest total came from AstraZeneca Pharmaceuticals LP.
How long has Dr. Guillermo Alfredo Mendoza Fonseca been practicing?
Dr. Mendoza Fonseca graduated from medical school in 2001, 25 years ago.
What insurance does Dr. Guillermo Alfredo Mendoza Fonseca accept?
Dr. Mendoza Fonseca is in network with 9 carriers, including Aetna, Elevance and United Healthcare. HMO plans come from the most carriers, 4. Check the plan with the practice before a visit.
Selling to general practice practices?
See general practice physicians in Florida by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card