Doctor profile · Federal record
Dr. Guillermo Marrero, M.D.
Internal Medicine Physician (CMS: Internal Medicine) · Oviedo, FL
- NPI 1245211044
- Accepts Medicare
- 33 yrs in practice
- Male
- Solo practice
- No sanctions
Practice & contact
- Primary practice
-
1000 Executive Dr, Suite 1
Oviedo, FL 327658140
(407) 971-1970
Credentials & registration
- NPI registered
- November 2005 — 21 yrs on file
- Profile last updated
- September 22, 2010
- Year of graduation
- 1993 — 33 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State license (1)
- Florida #ME0074991
- Medicaid
- FL #26328 11 00
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1245211044. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
1,030
Distinct HCPCS
7
Medicare allowed
$75,969
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 647 | 169 | $88 | |
G0439 |
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 120 | 120 | $126 | |
96372 |
Injection of drug or substance under skin or into muscle | 100 | 46 | $14 | |
J3420 |
Injection, vitamin b-12 cyanocobalamin, up to 1000 mcg | 61 | 22 | $2 | |
J1885 |
Injection, ketorolac tromethamine, per 15 mg | 58 | 21 | $1 | |
81002 |
Urinalysis, manual test | 23 | 17 | $3 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 21 | 14 | $106 |
In context: peer comparison
Among 4 peers in this city , average services per provider: 121. This provider delivers 8.5× the peer median.Open Payments
Industry payments received
All-time total
$385
Transactions
17
Manufacturers
9
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| AstraZeneca Pharmaceuticals LP | 6 | $172.20 | |
| Lilly USA, LLC | 2 | $39.53 | |
| Novo Nordisk Inc | 2 | $39.48 | |
| ABBVIE INC. | 2 | $35.64 | |
| Amgen Inc. | 1 | $23.57 | |
| Abbott Laboratories | 1 | $23.04 | |
| GlaxoSmithKline, LLC. | 1 | $18.59 | |
| Organogenesis Inc. | 1 | $18.18 | |
| Exact Sciences Corporation | 1 | $14.60 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
1,823
Patients
558
Total drug cost
$29,463
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Rosuvastatin Calcium | Generic | 269 | 90 | $5,533 |
| Levothyroxine Sodium | Generic | 201 | 58 | $4,109 |
| Amlodipine Besylate | Generic | 182 | 64 | $1,435 |
| Atorvastatin Calcium | Generic | 166 | 48 | $2,249 |
| Alprazolam | Generic | 110 | 24 | $661 |
| Tamsulosin Hcl | Generic | 105 | 31 | $2,067 |
| Pantoprazole Sodium | Generic | 99 | 36 | $1,467 |
| Omeprazole | Generic | 96 | 35 | $2,430 |
| Lisinopril | Generic | 92 | 27 | $656 |
| Losartan Potassium | Generic | 91 | 27 | $1,333 |
Frequently asked questions
What is Dr. Guillermo Marrero's medical specialty?
Dr. Guillermo Marrero practices Internal Medicine Physician in Oviedo, FL.
Where does Dr. Guillermo Marrero practice?
Dr. Guillermo Marrero practices at 1000 Executive Dr, Oviedo, FL 327658140. Office phone: 4079711970.
What is Dr. Guillermo Marrero's NPI?
Dr. Guillermo Marrero's National Provider Identifier (NPI) is 1245211044, issued by NPPES.
Does Dr. Guillermo Marrero accept Medicare assignment?
Yes. Dr. Guillermo Marrero accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Guillermo Marrero commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99213); Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (HCPCS G0439); Injection of drug or substance under skin or into muscle (HCPCS 96372). Source: CMS Medicare Physician & Other Practitioners file.