MR. GUILLERMO MARRERO (M.D.) – Internal Medicine Physician, NPI 1245211044
Internal Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
12,425 INTERNAL MEDICINE in FL
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Provider Addresses for MR. GUILLERMO MARRERO (M.D.)
1000, Executive Drive, Oviedo Executive Center, Oviedo, Seminole County, Florida, 32765, United States
SUITE 1
OVIEDO, FL 327658140
Phone: (407) 971-1970
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 47 Open Payments records for all available years, with a total value of $1,055.
Total Amount is formed as General ($1,055) + Research ($0) + Ownership ($0) = $1,055.
Last reported payment date: 2024-11-13 • Largest payer in this snapshot: AstraZeneca Pharmaceuticals LP ($360).
Total Amount
$1,055
General + Research + Ownership
Payments
47
Total payment records
General Amount
$1,055
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-11-13
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| AstraZeneca Pharmaceuticals LP | $360 |
| Vanda Pharmaceuticals Inc. | $229 |
| Novo Nordisk Inc | $85 |
| Lilly USA, LLC | $81 |
| GlaxoSmithKline, LLC. | $74 |
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: 2012-06-28
PECOS data refreshed: 2026-06-15
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 |
|---|---|---|---|---|
| I20120628000164 | 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 |
|---|---|---|---|---|
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 647 | 169 | $0 |
| G0439 | Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 120 | 120 | $0 |
| 96372 | Injection of drug or substance under skin or into muscle | 100 | 46 | $0 |
| J3420 | Injection, vitamin b-12 cyanocobalamin, up to 1000 mcg | 61 | 22 | $0 |
| J1885 | Injection, ketorolac tromethamine, per 15 mg | 58 | 21 | $0 |
Insurance plans in this area (ZIP 32765)
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