DR. STEVEN EVANS GUILLEN MD
NPI 1710911029
Emergency Medicine in Freehold, NJ
About Dr. Steven Evans Guillen Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. STEVEN EVANS GUILLEN MD (NPI 1710911029) is an individual emergency medicine provider in Freehold, New Jersey, licensed in New Jersey (25MA08050600) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS, is affiliated with Centrastate Medical Center, and maintains 3 additional practice locations.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 3
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Steven Evans Guillen Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
10Medicare enrollment records show Steven Guillen reassigns Medicare billing to 10 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Freehold, NJ 07728
- Reassigned Medicare billing, New Jersey enrollment
- 123 clinicians in this Medicare group
Freehold, NJ 07728
- Reassigned Medicare billing, New Jersey enrollment
- 39 clinicians in this Medicare group
Tinton Falls, NJ 07724
- Reassigned Medicare billing, New Jersey enrollment
- 20 clinicians in this Medicare group
Princeton, NJ 08540
- Reassigned Medicare billing, New Jersey enrollment
- 421 clinicians in this Medicare group
Mount Holly, NJ 08060
- Reassigned Medicare billing, New Jersey enrollment
- 248 clinicians in this Medicare group
Brooklyn, NY 11238
- Reassigned Medicare billing, New York enrollment
- 35 clinicians in this Medicare group
Voorhees, NJ 08043
- Reassigned Medicare billing, New Jersey enrollment
- 332 clinicians in this Medicare group
Bronx, NY 10459
- Reassigned Medicare billing, New York enrollment
- 49 clinicians in this Medicare group
Bronx, NY 10468
- Reassigned Medicare billing, New York enrollment
- 45 clinicians in this Medicare group
Bronx, NY 10462
- Reassigned Medicare billing, New York enrollment
- 52 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 5
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Centrastate Medical Center
Acute Care Hospitals · Freehold, NJPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 07728 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
FREEHOLD, NJ 07728
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Steven Guillen's NPI number?
The NPI number for Steven Guillen is 1710911029. It was assigned to this individual provider in the NPPES registry on July 10, 2006.
Where is Steven Guillen located?
Steven Guillen practices at 901 W Main St, Freehold, NJ 07728. The listed phone number is (732) 294-2666.
What is Steven Guillen's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Steven Guillen enrolled in Medicare?
Yes. Steven Guillen is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Steven Guillen's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Steven Guillen reassigns Medicare benefits to 10 organizations: Morristown Emergency Medical Associates LLC (Freehold, NJ), Central Jersey Emergency Medicine Associates, PC (Freehold, NJ), Usa Vein Clinics Of New Jersey LLC (Tinton Falls, NJ), Signify Health Medical Associates Of New Jersey, LLC (Princeton, NJ), Emergency Physician Services Of New Jersey,professional Association (Mount Holly, NJ) and 5 more organizations, listed in the Medicare section above. Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Steven Guillen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Steven Guillen affiliated with any hospitals?
According to CMS data, Steven Guillen is affiliated with Centrastate Medical Center.
When was this NPI record last updated?
The NPPES record for Steven Guillen was last updated on September 11, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 50 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. Steven Evans Guillen, MD · NPI 1710911029
Emergency Medicine physician in Freehold, New Jersey. Individual provider, active in the CMS NPPES registry since July 10, 2006.
## Identity
- **NPI:** 1710911029 (Entity type: Individual)
- **Enumerated:** July 10, 2006
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 25MA08050600 (New Jersey)
- **Sole proprietor:** No
## Practice location
- **Address:** 901 W MAIN ST, Freehold, NJ 07728-2549
- **Phone:** (732) 294-2666
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 10 organizations under Medicare reassignment (form CMS-855R): Morristown Emergency Medical Associates LLC (NPI 1649541087, Freehold, NJ); Central Jersey Emergency Medicine Associates, PC (NPI 1538106257, Freehold, NJ); Usa Vein Clinics Of New Jersey LLC (NPI 1245663236, Tinton Falls, NJ); Signify Health Medical Associates Of New Jersey, LLC (NPI 1174187728, Princeton, NJ); Emergency Physician Services Of New Jersey,professional Association (NPI 1831539568, Mount Holly, NJ); and 5 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Perelman School Of Med At The University Of Pennsylvania, class of 2001
## Record status
- **NPPES last updated:** September 11, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1710911029) · Data from the CMS NPPES public registry.