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RHIANNON MAZENIS PA-C
NPI 1669563805
Physician Assistant in Oak Forest, IL

Active since September 27, 2006PECOS EnrolledAccepts Medicare Assignment
5320 159TH ST, SUITE 400, OAK FOREST, IL 60452(708) 798-8112(708) 535-6396 Get Directions Write a Review

NPPES record last updated: April 24, 2019. Verified against the NPPES registry weekly; last sync: August 30, 2026.

About Rhiannon Mazenis Pa-c NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

RHIANNON MAZENIS PA-C (NPI 1669563805) is an individual physician assistant in Oak Forest, Illinois, licensed in Illinois (385001545) and active in the NPI registry since September 2006. She is enrolled in Medicare PECOS, is affiliated with Macneal Hospital, and is a graduate of Other (2005).

NPPES Registry Identity

NPI1669563805
Entity TypeIndividualFemale
Primary Taxonomy363A00000X
Provider Legal NameRHIANNON MAZENISCredential: PA-C
Location Address5320 159TH ST, SUITE 400Oak Forest, IL 60452-4705
Mailing Address1365 Wiley Rd, Ste 153Schaumburg, IL 60173-4357 · (847) 519-4701 · Fax (847) 519-4707
Phone(708) 798-8112
Fax(708) 535-6396
Sole ProprietorNo
Medical School CMSOtherGraduated 2005
Enumeration DateSeptember 27, 2006
Last NPPES UpdateApril 24, 2019
✔ NPI 1669563805 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPhysician AssistantPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363A00000X
License✔ Licensed in IL · 385001545
Definition
A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.
5320 159TH ST, Oak Forest, IL 60452
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Other Names 1

Former Name (1)Rhiannon Sato

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Rhiannon Mazenis Pa-c 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.

PECOS PAC ID2668479122
PECOS Enrollment IDI20061026000375
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 3

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.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
163 services111 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
93 services74 patients
Care management services for behavioral health conditions, 20 minutes or more clinical staff time directed by health care professional 99484
Care management for behavioral health involves a healthcare professional directing clinical staff to provide you with support for 20 minutes or more. This service can include planning your care, coordinating services, and managing your health conditions to improve your overall well-being.
46 services41 patients

Hospital Affiliations CMS Care Compare 3

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Macneal Hospital

Acute Care Hospitals · Berwyn, IL
2/5 CMS rating
OwnershipProprietary
CMS Certification Number140054
Location3249 South Oak Park AvenueBerwyn, IL 60402 · Cook County
Emergency services Birthing friendly

Alexian Brothers Medical Center 1

Acute Care Hospitals · Elk Grove Village, IL
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number140258
Location800 Biesterfield RdElk Grove Village, IL 60007 · Cook County
Emergency services Birthing friendly

St Alexius Medical Center

Acute Care Hospitals · Hoffman Estates, IL
4/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number140290
Location1555 N Barrington RdHoffman Estates, IL 60169 · Cook County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60452 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$94.06 typical visit price
range $60.08 – $183.39
Typical copayment $23.51 (range $15.02 – $45.84)
Most-billed visit code 99203
Established Patient
$74.80 typical visit price
range $18.97 – $148.12
Typical copayment $18.70 (range $4.74 – $37.03)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 12

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

PCMC EAST
Family Medicine
5320 159TH ST, SUITE 400
OAK FOREST, IL 60452
Cook County (708) 798-8112
SWEET HOMES TRANSPORTATION
Non-emergency Medical Transport (VAN)
5320 159TH ST
OAK FOREST, IL 60452
Cook County (773) 998-5380
HOME HEALTH CARE PROVIDERS, INC.
Home Health
5320 159TH ST, SUITE 402
OAK FOREST, IL 60452
Cook County (708) 331-6930
ABRAHAM P MATHEW, MD.SC
Internal Medicine
5320 159TH ST
OAK FOREST, IL 60452
Cook County (708) 687-5400
SOUTH SUBURBAN OBSTETRICS &
Obstetrics & Gynecology
5320 159TH ST, SUITE 102
OAK FOREST, IL 60452
Cook County (708) 687-7373
DR. HYUN T OH M.D.
Orthopaedic Surgery (Hand Surgery)
5320 159TH ST
OAK FOREST, IL 60452
Cook County (708) 687-8000
CORE FAMILY HOME HEALTH INC
Home Health
5320 159TH ST
OAK FOREST, IL 60452
Cook County (630) 240-8658
METRO REHABILITATION SERVICES LTD
Physical Therapist
5320 159TH ST, STE. 300
OAK FOREST, IL 60452
Cook County (708) 687-4747

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 Rhiannon Mazenis's NPI number?

The NPI number for Rhiannon Mazenis is 1669563805. It was assigned to this individual provider in the NPPES registry on September 27, 2006. The provider is also known as Rhiannon Sato.

Where is Rhiannon Mazenis located?

Rhiannon Mazenis practices at 5320 159th St Suite 400, Oak Forest, IL 60452. The listed phone number is (708) 798-8112.

What is Rhiannon Mazenis's specialty?

The primary specialty registered for this NPI is Physician Assistant with taxonomy code 363A00000X.

Is Rhiannon Mazenis enrolled in Medicare?

Yes. Rhiannon Mazenis 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.

Is Rhiannon Mazenis affiliated with any hospitals?

According to CMS data, Rhiannon Mazenis is affiliated with Macneal Hospital, Alexian Brothers Medical Center 1 and St Alexius Medical Center.

When was this NPI record last updated?

The NPPES record for Rhiannon Mazenis was last updated on April 24, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 years 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.