Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Xi Chen, MD, PHD

Individual provider Sleep Medicine (Psychiatry & Neurology) Physician · NPI 1285940973

Xi Chen, MD, PHD practises Sleep Medicine in Boston, Massachusetts. Qualified in 2000, 26 years ago. Practices with Atrius Health Inc, a 1,205-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Massachusetts.

Years since qualifying
26
Licensed in
MA
In the registry since
2010
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.
PHD — Doctor of Philosophy
A research doctorate. In healthcare it usually sits alongside a clinical licence.

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Practice location Address checks out

133 Brookline Ave
Boston, MA 02215-3904
Phone: (617) 421-1020
Fax: (617) 421-1063
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Sleep Medicine (Psychiatry & Neurology) Physician (primary) Taxonomy 2084S0012X · Licence 254850 (MA)
Specialist Taxonomy 174400000X

Record details

NPI number1285940973
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD , PHD
Sole proprietorNo
NPI enumeratedAugust 19, 2010
Last updated in NPPESFebruary 4, 2021
Certification dateFebruary 4, 2021

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtySLEEP MEDICINE
Also practisesNEUROLOGY
Medical schoolOTHER
Graduated 2000 (26 years in practice)
Group practice Atrius Health Inc — 1205 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations5 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients415
Services billed 633 a service is one billed item, such as a visit, a test or a procedure
Average patient age71

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Colleagues at Atrius Health Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1205 clinicians in the practice; 12 are shown here.

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