NPPES file of Aug 9, 2026

Chelsea Macmillan, LMSW

Social Worker · Mastic, NY

Chelsea Macmillan, LMSW is a social worker with a practice address in Mastic, New York, and NPI 1477220515, issued on Aug 26, 2021. Check the license with the New York board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1477220515
Name
Chelsea Macmillan
Credential
LMSW
Primary taxonomy
Social Worker 104100000X
Practice location
53 Carlin Dr, Mastic, NY 11950
Phone
(631) 559-4493
Enumerated
Aug 26, 2021
Record last updated
Aug 26, 2021 (not updated in 5 years: call before relying on the address or phone)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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Verify Chelsea Macmillan in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich New York board licenses this professionCheck the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
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17 social worker records list a practice address in Mastic

They are 17 of the 205 NPPES records with a practice address in Mastic, and 23,561 social worker records in New York. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 17 in Mastic → All 23,561 in New York → Every provider in Mastic →

Other social worker records in New York

  1. Sheila AagnerNew York, NY1801720784
  2. Desiree AaronBronx, NY1851277875
  3. Joy Aaron, LMSWAlbany, NY1295376192
  4. Fay Aaronson, LCSW-RMargaretville, NY1710253224
  5. Iliana Abad, LMSWBrooklyn, NY1427328194
  6. Samantha AbadNew York, NY1831948561
  7. Angelyse Abalco, LMSWSmithtown, NY1083255251
  8. Nicola Abbadessa, LCSWRego Park, NY1235239310
  9. Fadhil AbbasBuffalo, NY1588222418
  10. Marya Abbas, LMSWJackson Heights, NY1770355190

Common questions

What is Chelsea Macmillan, LMSW's NPI number?

Chelsea Macmillan, LMSW's National Provider Identifier (NPI) is 1477220515, issued on Aug 26, 2021. An NPI identifies a provider in billing; it is not a license.

Where is Chelsea Macmillan, LMSW located?

The NPPES record lists a practice address at 53 Carlin Dr, Mastic, NY, 11950. Phone: (631) 559-4493. Providers update this record themselves, so call before visiting.

How can I verify Chelsea Macmillan, LMSW's license?

Search the New York board that licenses this profession; the NPPES record confirms identity only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.