MS. CAITLYN MICHELLE ELLIS PA-C
NPI 1013587963
Physician Assistant in Boston, MA

Active since July 01, 2021PECOS EnrolledAccepts Medicare Assignment
95.35/100
CMS Quality Rating
300 LONGWOOD AVE, BOSTON, MA 02115(617) 355-6000 Get Directions Write a Review

NPPES record last updated: February 26, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Ms. Caitlyn Michelle Ellis Pa-c NPPES

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

MS. CAITLYN MICHELLE ELLIS PA-C (NPI 1013587963) is an individual physician assistant in Boston, Massachusetts, licensed in Massachusetts (PA102110) and active in the NPI registry since July 2021. She is enrolled in Medicare PECOS and is a graduate of Wake Forest University School Of Medicine (2021).

NPPES Registry Identity

NPI1013587963
Entity TypeIndividualFemale
Primary Taxonomy363A00000X
Provider Legal NameMS. CAITLYN MICHELLE ELLISCredential: PA-C
Location Address300 LONGWOOD AVEBoston, MA 02115-5724
Mailing Address300 Longwood AveBoston, MA 02115-5724 · (617) 355-6000
Sole ProprietorNo
Medical School CMSWake Forest University School Of MedicineGraduated 2021
Enumeration DateJuly 1, 2021
Last NPPES UpdateFebruary 26, 2026
NPPES CertifiedFebruary 26, 2026
NPI 1013587963 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyPhysician AssistantPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363A00000X
Licenses Licensed in MA · PA102110 Licensed in NC · 0010-11400
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.
300 LONGWOOD AVE, Boston, MA 02115

Other Identifiers 1

Other0397730007NC · Nsc #

Accepted Insurance

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

Ms. Caitlyn Michelle Ellis 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 ID5991107963
PECOS Enrollment IDI20210713003111
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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 02115 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.

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.

95.35/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored through an Alternative Payment Model
Quality84.22
Promoting Interoperability100
Improvement Activities40

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.

Social Worker (Clinical)
300 LONGWOOD AVE
BOSTON, MA 02115
Nurse Practitioner (Psychiatric/Mental Health)
300 LONGWOOD AVE
BOSTON, MA 02115
Anesthesiology (Pediatric Anesthesiology)
300 LONGWOOD AVE
BOSTON, MA 02115
Physical Therapist
300 LONGWOOD AVE
BOSTON, MA 02115
Social Worker (Clinical)
300 LONGWOOD AVE, CHILDREN'S HOSPITAL BOSTON
BOSTON, MA 02115
Pediatrics
300 LONGWOOD AVE, BADER 203
BOSTON, MA 02115
Nurse Practitioner (Pediatrics)
300 LONGWOOD AVE, HUNNEWELL BUILDING 322
BOSTON, MA 02115
Pediatrics (Neonatal-Perinatal Medicine)
300 LONGWOOD AVE
BOSTON, MA 02115

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 Caitlyn Ellis's NPI number?

The NPI number for Caitlyn Ellis is 1013587963. It was assigned to this individual provider in the NPPES registry on July 1, 2021.

Where is Caitlyn Ellis located?

Caitlyn Ellis practices at 300 Longwood Ave, Boston, MA 02115. The listed phone number is (617) 355-6000.

What is Caitlyn Ellis's specialty?

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

Is Caitlyn Ellis enrolled in Medicare?

Yes. Caitlyn Ellis 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.

What insurance does Caitlyn Ellis accept?

Health plans from Ambetter from Absolute Total Care, Ambetter of North Carolina, Molina Healthcare and UnitedHealthcare list Caitlyn Ellis as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Caitlyn Ellis was last updated on February 26, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.