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DR. KATHERINE ELLIN PH.D.
NPI 1952456709
Psychologist - Clinical in Cambridge, MA

Active since January 24, 2007Opted out of Medicare · through Aug 2, 2027
763 MASSACHUSETTS AVE, CAMBRIDGE, MA 02139(617) 864-3667 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Dr. Katherine Ellin Ph.d. NPPES

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

DR. KATHERINE ELLIN PH.D. (NPI 1952456709) is an individual clinical provider in Cambridge, Massachusetts, licensed in Massachusetts (7132) and active in the NPI registry since January 2007. She has opted out of Medicare through August 2, 2027 and remains eligible to order and refer.

NPPES Registry Identity

NPI1952456709
Entity TypeIndividualFemale
Primary Taxonomy103TC0700X
Provider Legal NameDR. KATHERINE ELLINCredential: PH.D.
Location Address763 MASSACHUSETTS AVECambridge, MA 02139-3329
Mailing Address763 Massachusetts AveCambridge, MA 02139-3329 · (617) 864-3667
Phone(617) 864-3667
Sole ProprietorYes
Enumeration DateJanuary 24, 2007
Last NPPES UpdateJuly 8, 2007
✔ NPI 1952456709 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychologist · ClinicalBehavioral Health & Social Service Providers
Taxonomy Code103TC0700X
License✔ Licensed in MA · 7132
Definition
A psychologist who provides continuing and comprehensive mental and behavioral health care for individuals and families; consultation to agencies and communities; training, education and supervision; and research-based practice. It is a specialty in breadth -- one that is broadly inclusive of severe psychopathology -- and marked by comprehensiveness and integration of knowledge and skill from a broad array of disciplines within and outside of psychology proper. The scope of clinical psychology encompasses all ages, multiple diversities and varied systems.
763 MASSACHUSETTS AVE, Cambridge, MA 02139
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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

ⓘ

Opted out of Medicare

Dr. Katherine Ellin Ph.d. has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from August 2, 2017 through August 2, 2027.

Opt-Out Effective DateAugust 2, 2017
Opt-Out In Effect ThroughAugust 2, 2027Opt-out affidavits renew automatically every two years unless cancelled
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment– Home Health Agency– Power Mobility DevicesAn opted-out provider can still order and refer for Medicare patients in the categories marked above, even though their own services are not covered.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 02139 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
$189.86 typical visit price
range $63.72 – $189.86
Typical copayment $47.46 (range $15.93 – $47.46)
Most-billed visit code 99205
Established Patient
$111.18 typical visit price
range $21.07 – $155.29
Typical copayment $27.79 (range $5.26 – $38.82)
Most-billed visit code 99214
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 3

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

MARIE B JEAN MARY DMD
Dentist
763 MASSACHUSETTS AVE, SUITE 1
CAMBRIDGE, MA 02139
Middlesex County (617) 547-1300
MS. HOAY CHEAH LMHC, MS
Counselor (Mental Health)
763 MASSACHUSETTS AVE, SUITE 5
CAMBRIDGE, MA 02139
Middlesex County (617) 909-7377
DR. CRISTIN GRIFFIN PSY.D.
Psychologist (Clinical)
763 MASSACHUSETTS AVE, SUITE 5
CAMBRIDGE, MA 02139
Middlesex County (781) 606-2336

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 Katherine Ellin's NPI number?

The NPI number for Katherine Ellin is 1952456709. It was assigned to this individual provider in the NPPES registry on January 24, 2007.

Where is Katherine Ellin located?

Katherine Ellin practices at 763 Massachusetts Ave, Cambridge, MA 02139. The listed phone number is (617) 864-3667.

What is Katherine Ellin's specialty?

The primary specialty registered for this NPI is Psychologist, specializing in Clinical, with taxonomy code 103TC0700X.

Is Katherine Ellin enrolled in Medicare?

No. Katherine Ellin has opted out of Medicare through August 2, 2027. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out. The provider remains eligible to order and refer services for Medicare patients.

When was this NPI record last updated?

The NPPES record for Katherine Ellin was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.