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ELIZABETH AINSLIE WALLACE
NPI 1821713173
Social Worker - Clinical in Cambridge, MA

Active since October 10, 2022PECOS Enrolled
275 CONCORD AVE APT 2, CAMBRIDGE, MA 02138(617) 406-7877 Get Directions Write a Review

NPPES record last updated: October 10, 2022. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Elizabeth Ainslie Wallace NPPES

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

ELIZABETH AINSLIE WALLACE (NPI 1821713173) is an individual clinical provider in Cambridge, Massachusetts, licensed in Massachusetts (124227) and active in the NPI registry since October 2022. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1821713173
Entity TypeIndividualFemale
Primary Taxonomy1041C0700X
Provider Legal NameELIZABETH AINSLIE WALLACE
Location Address275 CONCORD AVE APT 2Cambridge, MA 02138-1396
Mailing Address275 Concord Ave Apt 2Cambridge, MA 02138-1396 · (617) 406-7877
Phone(617) 406-7877
Sole ProprietorYes
Enumeration DateOctober 10, 2022
NPPES CertifiedOctober 10, 2022
✔ NPI 1821713173 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 · 124227
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.
275 CONCORD AVE APT 2, Cambridge, MA 02138
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Harvard Pilgrim Health Care.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Elizabeth Ainslie Wallace is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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.

Medicare Billing Reassignments

2

Medicare enrollment records show Elizabeth Wallace reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Massachusetts General Physicians Organization Inc
3.6 mi
Dermatology
55 FRUIT ST, BUL 2
Boston, MA 02114
  • Reassigned Medicare billing, Massachusetts enrollment
  • 6,360 clinicians in this Medicare group
NPI 1801874573 (617) 724-0287
The General Hospital Corporation
3.6 mi
General Acute Care Hospital
55 FRUIT ST, BULFINCH 360
Boston, MA 02114
  • Reassigned Medicare billing, Massachusetts enrollment
  • 6,234 clinicians in this Medicare group
NPI 1023049236 (617) 726-2000

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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.

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 Elizabeth Wallace's NPI number?

The NPI number for Elizabeth Wallace is 1821713173. It was assigned to this individual provider in the NPPES registry on October 10, 2022.

Where is Elizabeth Wallace located?

Elizabeth Wallace practices at 275 Concord Ave Apt 2, Cambridge, MA 02138. The listed phone number is (617) 406-7877.

What is Elizabeth Wallace's specialty?

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

Is Elizabeth Wallace enrolled in Medicare?

Yes. Elizabeth Wallace is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Elizabeth Wallace's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Elizabeth Wallace reassigns Medicare benefits to 2 organizations: Massachusetts General Physicians Organization Inc (Boston, MA) and The General Hospital Corporation (Boston, MA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Elizabeth Wallace's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Elizabeth Wallace accept?

Health plans from Harvard Pilgrim Health Care list Elizabeth Wallace 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 Elizabeth Wallace was last updated on October 10, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.