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MARIAN M HALLOWELL LICSW
NPI 1396236600
Social Worker - Clinical in Portsmouth, NH

Active since May 22, 2018PECOS EnrolledAccepts Medicare Assignment
8 GREENLEAF WOODS DR STE 100, PORTSMOUTH, NH 03801(603) 422-8202(603) 422-8219 Get Directions Write a Review

NPPES record last updated: September 15, 2022. Verified against the NPPES registry weekly; last sync: November 08, 2026.

Record update history: Sep 15, 2022, May 22, 2018 (2 updates tracked since 2018).

About Marian M Hallowell Licsw NPPES

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

MARIAN M HALLOWELL LICSW (NPI 1396236600) is an individual clinical provider in Portsmouth, New Hampshire, licensed in New Hampshire (2612) and active in the NPI registry since May 2018. She is enrolled in Medicare PECOS and is a graduate of Other (2018).

NPPES Registry Identity

NPI1396236600
Entity TypeIndividualFemale
Primary Taxonomy1041C0700X
Provider Legal NameMARIAN M HALLOWELLCredential: LICSW
Location Address8 GREENLEAF WOODS DR STE 100Portsmouth, NH 03801-5436
Mailing Address311 Route 108Somersworth, NH 03878-1522 · (603) 749-2346 · Fax (603) 953-0066
Phone(603) 422-8202
Fax(603) 422-8219
Sole ProprietorNo
Medical School CMSOtherGraduated 2018
Enumeration DateMay 22, 2018
Last NPPES UpdateSeptember 15, 20222 updates tracked since enumeration
NPPES CertifiedSeptember 15, 2022
✔ NPI 1396236600 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtySocial Worker · ClinicalBehavioral Health & Social Service Providers
Taxonomy Code1041C0700X
License✔ Licensed in NH · 2612
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.
Also ListedSocial WorkerTaxonomy 104100000X
8 GREENLEAF WOODS DR STE 100, Portsmouth, NH 03801
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield, 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 and accepts Medicare assignment

Marian M Hallowell Licsw is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID1658747860
PECOS Enrollment IDI20221012003844
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 Reassignment

Medicare enrollment records show Marian Hallowell reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Greater Seacoast Community Health
Same address
Federally Qualified Health Center (FQHC)
8 GREENLEAF WOODS DR
Portsmouth, NH 03801
  • Reassigned Medicare billing, New Hampshire enrollment
  • 48 clinicians in this Medicare group
NPI 1114935871 (603) 422-8208

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 03801 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 $57.75 – $174.26
Typical copayment $0.00 (range $14.43 – $43.56)
Most-billed visit code NA
Established Patient
$71.85 typical visit price
range $18.70 – $142.15
Typical copayment $17.96 (range $4.67 – $35.53)
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 Marian Hallowell's NPI number?

The NPI number for Marian Hallowell is 1396236600. It was assigned to this individual provider in the NPPES registry on May 22, 2018.

Where is Marian Hallowell located?

Marian Hallowell practices at 8 Greenleaf Woods Dr Ste 100, Portsmouth, NH 03801. The listed phone number is (603) 422-8202.

What is Marian Hallowell's specialty?

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

Is Marian Hallowell enrolled in Medicare?

Yes. Marian Hallowell is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organization bills Medicare for Marian Hallowell's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Marian Hallowell reassigns Medicare benefits to Greater Seacoast Community Health (Portsmouth, NH). The 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 Marian Hallowell's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Marian Hallowell accept?

Health plans from Anthem Blue Cross and Blue Shield and Harvard Pilgrim Health Care list Marian Hallowell 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 Marian Hallowell was last updated on September 15, 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.