NPI registry status
Active
2026 NPPES data Social Worker NPI 1639831399 LMSW
Verify on CMS → Michael Harris, LMSW
Social Worker in Holtsville, New York.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 140,115 in 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
Michael Harris, LMSW is a Social Worker in Holtsville, New York, listed in the federal CMS National Provider Identifier registry.
- #4
- Social Worker rank among New York 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 1639831399 · Social Worker
NPI-10 · ENUM-RECENT · TAX-MEGA · RX-NONE · BOOK-MID · PHOTO-ENUM
- NPI-10 1639831399
- ENUM-RECENT 2021
- TAX-MEGA 140K Social Worker
- RX-NONE No Part D
- BOOK-MID 24,209 in New York
- PHOTO-ENUM Diana Esparza · 2021
What does the federal data show about Michael Harris, LMSW?
Quality data not reportedPrimary specialty
Social Worker
Specialty distribution in New York
How Social Worker compares to other specialties among New York 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 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 | 1639831399 |
|---|---|
| Specialty | Social Worker |
| Credentials | LMSW |
| Gender | Male |
| NPI Issued | 10/11/2021 |
License & disciplinary context - New York NYSBPMC 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 ~100K New York medical licensees in 2023 - they are NOT specific to Michael Harris, LMSW. To verify Michael Harris, LMSW's current license status, search the NYSBPMC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
312
Total board actions, New York 2023
Across 302 cases
3.12
Actions per 1,000 licensees
New York statewide rate
probation
Most common action type
89 cases
NYSBPMC 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 New York disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Social Worker Overview
How Michael Harris, LMSW fits within the Social Worker landscape nationally.
140,115
Social Worker Providers in US
54
States with Social Worker
1,486
Avg Claims per Provider
Nationwide Social Worker peers with similar MIPS or enrollment year
Two federal-record peer sets for Harris, both outside New York so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2021)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Social Worker Providers in New York
Other clinicians with the same primary specialty enrolled in New York, drawn from the same CMS NPPES roster as Harris.
One of 24,209 Social Worker providers enrolled in New York, 5 are shown here.
Desiree Aaron
Bronx, NY
Dr. Joy Aaron
LMSW
Albany, NY
Dr. Shawna Marie Aarons-Cooke
LCSW
New Rochelle, NY
Dr. Fay Aaronson
LCSW-R
Margaretville, NY
Dr. Iliana Abad
LMSW
Brooklyn, NY
Compare Social Worker nationally: see state-by-state distribution →
Frequently Asked Questions
What is Michael Harris, LMSW's specialty? ▼
Michael Harris, LMSW specializes in Social Worker and practices in Holtsville, New York. Credentials: LMSW.
Where is Michael Harris, LMSW located? ▼
Michael Harris, LMSW is located at 755 WAVERLY AVE STE 216, Holtsville, NY, 11742. Phone: (631) 487-8181.
What is Michael Harris, LMSW's NPI number? ▼
Michael Harris, LMSW's National Provider Identifier (NPI) is 1639831399, issued on 10/11/2021.
How many Social Worker providers are there in the US? ▼
There are 140,115 Social Worker providers across 54 states in the US. The average Social Worker provider writes 1,486 Medicare Part D claims per year.
Does Michael Harris, LMSW accept Medicare? ▼
Michael Harris, LMSW appears in CMS Medicare data. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Michael Harris, LMSW's credentials? ▼
Michael Harris, LMSW's NPI is 1639831399 with credentials LMSW. 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.