PROVIDER PROFILE · NPI 1538252226

Gregorio GuillenM.D

PRACTICEGREGORIO J. GUILLEN MD, PCSee all providers at this practice →

Internal MedicinePerth Amboy, NJI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

852

Unique beneficiaries

—

Total services

1,192

Distinct HCPCS

Medicare payment

$95K

Peer benchmark

Total Medicare services vs. 3,616 Internal Medicine providers in NJ — above median (cohort median 895).

PRESCRIBING · PART D · 2024

Total Rx claims

14,251

Beneficiaries

—

Total drug cost

$1.6M

Distinct drugs

173

Brand share

27.7%

Top prescribed drugs

Atorvastatin Calcium829 claims

Omeprazole516 claims

Amlodipine Besylate495 claims

Metoprolol Succinate364 claims

Gabapentin322 claims

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024

Total received

$2K

Payment records

105

By payment type

Food and Beverage$2K

Education$8

REFERRAL NETWORK

Where Gregorio Guillen's patients come from & go

Directional shared-patient flow from Medicare claims — who sends patients to this provider (inbound) and where this provider's patients go next (outbound). 57 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
Romel Arjona Internal Medicine · Palm Beach Gardens, FL	171	2,646
WARREN, STEPHEN	91	562
Karen Salmieri Diagnostic Radiology · East Brunswick, NJ	86	538
Elaine Mariolis Podiatry · Perth Amboy, NJ	71	190
RARITAN MANAGEMENT CORPORATION	69	180
Rakesh Passi Cardiology · East Brunswick, NJ	66	454
Sanjeev Nayyar Gastroenterology · Old Bridge, NJ	60	455
Cooperman Barnabas Medical Center Inc Medicare Diabetes Preventive Program · Livingston, NJ	51	429
Norman Sorkin Diagnostic Radiology · East Brunswick, NJ	48	243
GIRGIS, WAHID	45	176
Bikramjit Singh Nephrology · Carteret, NJ	42	380
Amy Vogia Diagnostic Radiology · Chester, PA	41	164

Refers patients to

Outbound — where patients go next

No outbound pairs above the suppression threshold.

Source: CMS Physician Shared Patient Patterns (30-day window, Medicare FFS). Direction = a beneficiary seen by the first provider, then the second, within 30 days; a proxy for referral, not a documented referral. Pairs with fewer than 11 shared beneficiaries are suppressed.

CROSS-REFERENCE

Related data on other Healthparse brands

ProviderScore

OIG/SAM exclusion screening, sanctions history