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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

MRS. SPENCER BILLINGS NINEBERG MSW LICSW
NPI 1639160443
Social Worker - Clinical in Cambridge, MA

Active since November 01, 2005Opted out of Medicare · through Jun 21, 2027
307 CONCORD AVE, CAMBRIDGE, MA 02138(617) 497-4510 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Mrs. Spencer Billings Nineberg Msw Licsw NPPES

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

MRS. SPENCER BILLINGS NINEBERG MSW LICSW (NPI 1639160443) is an individual clinical provider in Cambridge, Massachusetts, licensed in Massachusetts (1002254) and active in the NPI registry since November 2005. She has opted out of Medicare through June 21, 2027 and remains eligible to order and refer.

NPPES Registry Identity

NPI1639160443
Entity TypeIndividualFemale
Primary Taxonomy1041C0700X
Provider Legal NameMRS. SPENCER BILLINGS NINEBERGCredential: MSW LICSW
Location Address307 CONCORD AVECambridge, MA 02138-1207
Mailing Address307 Concord AveCambridge, MA 02138-1207 · (617) 497-4510
Phone(617) 497-4510
Sole ProprietorNo
Enumeration DateNovember 1, 2005
Last NPPES UpdateJuly 13, 2026
✔ NPI 1639160443 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySocial Worker · ClinicalBehavioral Health & Social Service Providers
Taxonomy Code1041C0700X
License✔ Licensed in MA · 1002254
Definition
A social worker who holds a master's or doctoral degree in social work from an accredited school of social work in addition to at least two years of post-master's supervised experience in a clinical setting. The social worker must be licensed, certified, or registered at the clinical level in the jurisdiction of practice. A clinical social worker provides direct services, including interventions focused on interpersonal interactions, intrapsychic dynamics, and life management issues. Clinical social work services are based on bio-psychosocial perspectives. Services consist of assessment, diagnosis, treatment (including psychotherapy and counseling), client-centered advocacy, consultation, evaluation, and prevention of mental illness, emotional, or behavioral disturbances.
307 CONCORD AVE, Cambridge, MA 02138
Open in Google Maps ↗

Other Identifiers 2

OtherP02380MA · Blue Cross Blue Shield
Other102254MA · Pacifican 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

Mrs. Spencer Billings Nineberg Msw Licsw 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 June 21, 2017 through June 21, 2027.

Opt-Out Effective DateJune 21, 2017
Opt-Out In Effect ThroughJune 21, 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
$0.00 typical visit price
range $63.72 – $189.86
Typical copayment $0.00 (range $15.93 – $47.46)
Most-billed visit code NA
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

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

ALLAN NINEBERG MD
Psychiatry & Neurology (Psychiatry)
307 CONCORD AVE
CAMBRIDGE, MA 02138
Middlesex County (617) 497-1484

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 Spencer Nineberg's NPI number?

The NPI number for Spencer Nineberg is 1639160443. It was assigned to this individual provider in the NPPES registry on November 1, 2005.

Where is Spencer Nineberg located?

Spencer Nineberg practices at 307 Concord Ave, Cambridge, MA 02138. The listed phone number is (617) 497-4510.

What is Spencer Nineberg's specialty?

The primary specialty registered for this NPI is Social Worker, specializing in Clinical, with taxonomy code 1041C0700X.

Is Spencer Nineberg enrolled in Medicare?

No. Spencer Nineberg has opted out of Medicare through June 21, 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 Spencer Nineberg was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 29 days 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.