GUILLERMO ALFREDO MENDOZA FONSECA (M.D.) – General Practice Physician, NPI 1285898288
General Practice Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
12,368 INTERNAL MEDICINE in FL
Provider Addresses for GUILLERMO ALFREDO MENDOZA FONSECA (M.D.)
2572 W STATE ROAD 426 STE 3040
OVIEDO, FL 327658389
Phone: (407) 890-9748
Fax: (407) 890-9819
Mailing address matches the actual address.
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 69 Open Payments records for all available years, with a total value of $1,575.
Total Amount is formed as General ($1,575) + Research ($0) + Ownership ($0) = $1,575.
Last reported payment date: 2024-11-05 • Largest payer in this snapshot: AstraZeneca Pharmaceuticals LP ($689).
Total Amount
$1,575
General + Research + Ownership
Payments
69
Total payment records
General Amount
$1,575
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-11-05
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| AstraZeneca Pharmaceuticals LP | $689 |
| Novo Nordisk Inc | $161 |
| ABBVIE INC. | $89 |
| Amgen Inc. | $77 |
| Lilly USA, LLC | $70 |
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2013-10-28
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20131028000665 | I | Internal Medicine | FL | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 99490 | Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month | 242 | 32 | $0 |
| 99457 | Management using the results of remote vital sign monitoring per calendar month, first 20 minutes | 185 | 27 | $0 |
| 99454 | Remote monitoring of physiologic parameters, initial supply of devices with daily recordings or programmed alerts transmission, each 30 days | 168 | 23 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 128 | 65 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 86 | 42 | $0 |
Insurance plans in this area (ZIP 32765)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| INTERNAL MEDICINE | FL | 81002 | Urinalysis, manual test | 16 | 15 |
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