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MR. NIKOLAS W RIVERA PA
NPI 1861136186
Physician Assistant in Boston, MA

Active since April 22, 2022PECOS EnrolledAccepts Medicare Assignment
450 BROOKLINE AVE, BOSTON, MA 02215(617) 632-3352 Get Directions Write a Review

NPPES record last updated: January 31, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Jan 31, 2026, Jan 21, 2026, Apr 22, 2022 (3 updates tracked since 2022).

About Mr. Nikolas W Rivera Pa NPPES

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

MR. NIKOLAS W RIVERA PA (NPI 1861136186) is an individual physician assistant in Boston, Massachusetts, licensed in Massachusetts (PA9304) and active in the NPI registry since April 2022. He is enrolled in Medicare PECOS, is affiliated with Brigham And Women's Hospital, and is a graduate of Other (2022).

NPPES Registry Identity

NPI1861136186
Entity TypeIndividualMale
Primary Taxonomy363A00000X
Provider Legal NameMR. NIKOLAS W RIVERACredential: PA
Location Address450 BROOKLINE AVEBoston, MA 02215-5450
Mailing Address22 Shannon St Apt 2Brighton, MA 02135-3433 · (716) 998-6810
Phone(617) 632-3352
Sole ProprietorNo
Medical School CMSOtherGraduated 2022
Enumeration DateApril 22, 2022
Last NPPES UpdateJanuary 31, 20263 updates tracked since enumeration
NPPES CertifiedJanuary 31, 2026
✔ NPI 1861136186 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 MA · PA9304
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.
450 BROOKLINE AVE, Boston, MA 02215
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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

Mr. Nikolas W Rivera Pa 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 ID6709252737
PECOS Enrollment IDI20230602001387
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

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.

Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222
Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.
33 services33 patients

Hospital Affiliations CMS Care Compare

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

Brigham And Women's Hospital

Acute Care Hospitals · Boston, MA
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number220110
Location75 Francis StreetBoston, MA 02115 · Suffolk County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 02215 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
$97.64 typical visit price
range $63.72 – $189.86
Typical copayment $24.41 (range $15.93 – $47.46)
Most-billed visit code 99203
Established Patient
$78.84 typical visit price
range $21.07 – $155.29
Typical copayment $19.71 (range $5.26 – $38.82)
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 20

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

PRABHSIMRANJOT SINGH MD
Internal Medicine (Hematology & Oncology)
450 BROOKLINE AVE
BOSTON, MA 02215
Suffolk County (617) 582-7956
SHAWN MAGUIRE PA-C
Physician Assistant
450 BROOKLINE AVE
BOSTON, MA 02215
Suffolk County (617) 582-8487
KARINA FRANCA
Genetic Counselor, MS
450 BROOKLINE AVE
BOSTON, MA 02215
Suffolk County (857) 215-2285
DR. SUZANNE JAQUETH FORREST M.D.
Pediatrics (Pediatric Hematology-Oncology)
450 BROOKLINE AVE
BOSTON, MA 02215
Suffolk County (617) 632-3270
LAUREN KIRITSY MSW, LCSW
Counselor (Mental Health)
450 BROOKLINE AVE
BOSTON, MA 02215
Suffolk County (857) 215-3448
OFIR WOLAJ MD
Internal Medicine (Hematology & Oncology)
450 BROOKLINE AVE, DANA 2058
BOSTON, MA 02215
Suffolk County (617) 632-6139
JASON BATALHA AGPCNP-BC
Nurse Practitioner
450 BROOKLINE AVE
BOSTON, MA 02215
Suffolk County (617) 632-6140
FATIMA EMRAN AMIR MS, LGC
Genetic Counselor, MS
450 BROOKLINE AVE
BOSTON, MA 02215
Suffolk County (617) 632-3729

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 Nikolas Rivera's NPI number?

The NPI number for Nikolas Rivera is 1861136186. It was assigned to this individual provider in the NPPES registry on April 22, 2022.

Where is Nikolas Rivera located?

Nikolas Rivera practices at 450 Brookline Ave, Boston, MA 02215. The listed phone number is (617) 632-3352.

What is Nikolas Rivera's specialty?

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

Is Nikolas Rivera enrolled in Medicare?

Yes. Nikolas Rivera 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 Nikolas Rivera affiliated with any hospitals?

According to CMS data, Nikolas Rivera is affiliated with Brigham And Women's Hospital.

When was this NPI record last updated?

The NPPES record for Nikolas Rivera was last updated on January 31, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 months 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.