Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

EMMELINE A DILLER M.D.
NPI 1225077316
Psychiatry & Neurology - Psychiatry in Cambridge, MA

Active since June 05, 2006Opted out of Medicare · through Dec 18, 2027
1105 MASSACHUSETTS AVE, #2-D, CAMBRIDGE, MA 02138(617) 876-5453 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: July 19, 2026.

About Emmeline A Diller M.d. NPPES

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

EMMELINE A DILLER M.D. (NPI 1225077316) is an individual psychiatry provider in Cambridge, Massachusetts, licensed in Massachusetts (51691) and active in the NPI registry since June 2006. She has opted out of Medicare through December 18, 2027 and remains eligible to order and refer.

NPPES Registry Identity

NPI1225077316
Entity TypeIndividualFemale
Primary Taxonomy2084P0800X
Provider Legal NameEMMELINE A DILLERCredential: M.D.
Location Address1105 MASSACHUSETTS AVE, #2-DCambridge, MA 02138-5220
Mailing Address1105 Mass Ave, Suite# 2dCambridge, MA 02138-5220 · (617) 876-5453
Sole ProprietorNo
Enumeration DateJune 5, 2006
Last NPPES UpdateJuly 13, 2026
NPI 1225077316 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyPsychiatry & Neurology · PsychiatryAllopathic & Osteopathic Physicians
Taxonomy Code2084P0800X
License Licensed in MA · 51691
Definition

A Psychiatrist specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems.

1105 MASSACHUSETTS AVE, Cambridge, MA 02138

Accepted Insurance

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

Opted out of Medicare

Emmeline A Diller M.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 December 18, 2015 through December 18, 2027.

Opt-Out Effective DateDecember 18, 2015
Opt-Out In Effect ThroughDecember 18, 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 02138 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
$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.

Psychologist (Clinical)
1105 MASSACHUSETTS AVE, SUITE 3F
CAMBRIDGE, MA 02138
Psychologist (Clinical)
1105 MASSACHUSETTS AVE, SUITE 3E
CAMBRIDGE, MA 02138
Social Worker (Clinical)
1105 MASSACHUSETTS AVE, SUITE 1G
CAMBRIDGE, MA 02138
Psychologist
1105 MASSACHUSETTS AVE, STE. 1G
CAMBRIDGE, MA 02138
Social Worker (Clinical)
1105 MASSACHUSETTS AVE, SUITE 1G
CAMBRIDGE, MA 02138
Psychologist
1105 MASSACHUSETTS AVE, SUITE 2C
CAMBRIDGE, MA 02138
Social Worker (Clinical)
1105 MASSACHUSETTS AVE, SUITE 1G
CAMBRIDGE, MA 02138
Registered Nurse (Psychiatric/Mental Health)
1105 MASSACHUSETTS AVE, SUITE 3F
CAMBRIDGE, MA 02138

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 Emmeline Diller's NPI number?

The NPI number for Emmeline Diller is 1225077316. It was assigned to this individual provider in the NPPES registry on June 5, 2006.

Where is Emmeline Diller located?

Emmeline Diller practices at 1105 Massachusetts Ave #2-D, Cambridge, MA 02138. The listed phone number is (617) 876-5453.

What is Emmeline Diller's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.

Is Emmeline Diller enrolled in Medicare?

No. Emmeline Diller has opted out of Medicare through December 18, 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.

What insurance does Emmeline Diller accept?

Health plans from Anthem Blue Cross and Blue Shield and Harvard Pilgrim Health Care list Emmeline Diller 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 Emmeline Diller was last updated on July 13, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.