Doctor profile · Federal record
Dr. Gregorio Guillen, M.D
Geriatric Medicine (Internal Medicine) Physician (CMS: Internal Medicine) · Perth Amboy, NJ
- NPI 1538252226
- Accepts Medicare
- 44 yrs in practice
- Male
- Solo practice
- No sanctions
Practice & contact
- Primary practice
-
400 State St. Suite 2
Perth Amboy, NJ 08861
(732) 442-6020
fax (732) 442-1995 - Mailing address
-
Po Box 1608
Perth Amboy, NJ 088621608
Credentials & registration
- NPI registered
- October 2006 — 20 yrs on file
- Profile last updated
- August 6, 2013
- Year of graduation
- 1982 — 44 yrs since
- Specialty taxonomy
- 207RG0300X — NUCC code
- State license (1)
- New Jersey #MA56159
- Medicaid
- NJ #6523706
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1538252226. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
1,294
Distinct HCPCS
10
Medicare allowed
$127,830
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 404 | 171 | $141 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 223 | 130 | $98 | |
99497 |
Advance care planning, first 30 minutes | 133 | 133 | $90 | |
G0439 |
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 105 | 105 | $142 | |
G0444 |
Annual depression screening, 5 to 15 minutes | 104 | 104 | $21 | |
G0008 |
Administration of influenza virus vaccine | 65 | 64 | $34 | |
93000 |
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | 53 | 49 | $16 | |
90694 |
Influenza vaccine, quadrivalent inactivated, 0.5 ml dosage | 51 | 51 | $76 | |
99212 |
Established patient office or other outpatient visit, 10-19 minutes | 43 | 37 | $63 | |
77080 |
Dxa bone density measurement of hip, pelvis, spine | 31 | 31 | $44 |
In context: peer comparison
Among 1 peers in this city , average services per provider: 86. This provider delivers 15× the peer median.Open Payments
Industry payments received
All-time total
$1,761
Transactions
101
Manufacturers
15
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| AstraZeneca Pharmaceuticals LP | 12 | $247.40 | |
| Bayer Healthcare Pharmaceuticals Inc. | 12 | $243.00 | |
| Novartis Pharmaceuticals Corporation | 13 | $229.23 | |
| ABBVIE INC. | 11 | $157.77 | |
| GlaxoSmithKline, LLC. | 10 | $150.94 | |
| Amgen Inc. | 10 | $146.57 | |
| Boehringer Ingelheim Pharmaceuticals, Inc. | 7 | $100.86 | |
| Exact Sciences Corporation | 4 | $79.99 | |
| Novo Nordisk Inc | 5 | $78.95 | |
| Lilly USA, LLC | 5 | $75.43 | |
| Corcept Therapeutics | 4 | $56.74 | |
| IRONWOOD PHARMACEUTICALS, INC | 2 | $37.53 | |
| Lundbeck LLC | 2 | $33.69 | |
| Mylan Specialty L.P. | 2 | $33.02 | |
| Eisai Inc. | 2 | $27.22 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
5,240
Patients
1,501
Total drug cost
$254,138
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Atorvastatin Calcium | Generic | 809 | 258 | $15,262 |
| Omeprazole | Generic | 552 | 147 | $7,641 |
| Amlodipine Besylate | Generic | 503 | 158 | $4,869 |
| Metoprolol Succinate | Generic | 410 | 111 | $12,509 |
| Pantoprazole Sodium | Generic | 363 | 98 | $4,749 |
| Albuterol Sulfate Hfa (Albuterol Sulfate) | Brand | 330 | 74 | $12,643 |
| Losartan Potassium | Generic | 306 | 93 | $4,655 |
| Metformin Hcl | Generic | 285 | 89 | $2,987 |
| Gabapentin | Generic | 273 | 77 | $3,970 |
| Donepezil Hcl | Generic | 254 | 79 | $5,332 |
Frequently asked questions
What is Dr. Gregorio Guillen's medical specialty?
Dr. Gregorio Guillen practices Geriatric Medicine (Internal Medicine) Physician in Perth Amboy, NJ.
Where does Dr. Gregorio Guillen practice?
Dr. Gregorio Guillen practices at 400 State St. Suite 2, Perth Amboy, NJ 08861. Office phone: 7324426020.
What is Dr. Gregorio Guillen's NPI?
Dr. Gregorio Guillen's National Provider Identifier (NPI) is 1538252226, issued by NPPES.
Does Dr. Gregorio Guillen accept Medicare assignment?
Yes. Dr. Gregorio Guillen accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Gregorio Guillen commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); Established patient office or other outpatient visit (HCPCS 99213); Advance care planning (HCPCS 99497). Source: CMS Medicare Physician & Other Practitioners file.