NPI registry status
Active
2026 NPPES data Clinical Social Worker NPI 1275655375 LICSW
Verify on CMS → Katherine Tigelaar, LICSW
Clinical Social Worker in Reading, Massachusetts.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 274,526 in Clinical Social Worker, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
What the federal data shows
Katherine Tigelaar, LICSW is a Clinical Social Worker in Reading, Massachusetts, listed in the federal CMS National Provider Identifier registry.
- #2
- Clinical Social Worker rank among Massachusetts specialties
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
CMS NPPES provider registry desk
NPI 1275655375 · Clinical Social Worker
NPI-10 · ENUM-MID · TAX-MEGA · RX-NONE · BOOK-MID · PHOTO-ENUM
- NPI-10 1275655375
- ENUM-MID 2007
- TAX-MEGA 275K Clinical Social
- RX-NONE No Part D
- BOOK-MID 16,623 in Massachusetts
- PHOTO-ENUM Richard Brown · 2007
What does the federal data show about Katherine Tigelaar, LICSW?
Quality data not reportedPrimary specialty
Clinical Social Worker
Specialty distribution in Massachusetts
How Clinical Social Worker compares to other specialties among Massachusetts providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Clinical Social Worker. Verify directly:
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
Practice Address
Provider Details
| NPI | 1275655375 |
|---|---|
| Specialty | Clinical Social Worker |
| Credentials | LICSW |
| Gender | Female |
| NPI Issued | 04/06/2007 |
License & disciplinary context - Massachusetts BORIM 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~38K Massachusetts medical licensees in 2023 - they are NOT specific to Katherine Tigelaar, LICSW. To verify Katherine Tigelaar, LICSW's current license status, search the BORIM public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
80
Total board actions, Massachusetts 2023
Across 78 cases
2.11
Actions per 1,000 licensees
Massachusetts statewide rate
probation
Most common action type
29 cases
BORIM publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the Massachusetts disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Clinical Social Worker Overview
How Katherine Tigelaar, LICSW fits within the Clinical Social Worker landscape nationally.
274,526
Clinical Social Worker Providers in US
56
States with Clinical Social Worker
716
Avg Claims per Provider
Nationwide Clinical Social Worker peers with similar MIPS or enrollment year
Two federal-record peer sets for Tigelaar, both outside Massachusetts so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2007)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Clinical Social Worker Providers in Massachusetts
Other clinicians with the same primary specialty enrolled in Massachusetts, drawn from the same CMS NPPES roster as Tigelaar.
One of 16,623 Clinical Social Worker providers enrolled in Massachusetts, 5 are shown here.
Dr. Andrew Aaron
LICSW
New Bedford, MA
Cynthia Aaron
Fall River, MA
Dr. Karla Abad
LCSW
Lynn, MA
Dr. Amy Abair
LICSW
Boston, MA
Dr. Stephanie Abate
LICSW
Amherst, MA
Compare Clinical Social Worker nationally: see state-by-state distribution →
Frequently Asked Questions
What is Katherine Tigelaar, LICSW's specialty? ▼
Katherine Tigelaar, LICSW specializes in Clinical Social Worker and practices in Reading, Massachusetts. Credentials: LICSW.
Where is Katherine Tigelaar, LICSW located? ▼
Katherine Tigelaar, LICSW is located at 160 SUMMER AVE, Reading, MA, 01867. Phone: (857) 245-9296.
What is Katherine Tigelaar, LICSW's NPI number? ▼
Katherine Tigelaar, LICSW's National Provider Identifier (NPI) is 1275655375, issued on 04/06/2007.
How many Clinical Social Worker providers are there in the US? ▼
There are 274,526 Clinical Social Worker providers across 56 states in the US. The average Clinical Social Worker provider writes 716 Medicare Part D claims per year.
Does Katherine Tigelaar, LICSW accept Medicare? ▼
Katherine Tigelaar, LICSW appears in CMS Medicare data. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Katherine Tigelaar, LICSW's credentials? ▼
Katherine Tigelaar, LICSW's NPI is 1275655375 with credentials LICSW. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.