Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Steven Hugh Sewall
Specialist in Marlboro, MA · enumerated 2005.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1669474607
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Registry record
Entity type Individual (Type 1)
Name Dr. Steven Hugh Sewall
Sex Male
Practice address 65 Fremont St, Marlboro, MA, 01752
Phone (508) 485-1079
Fax (508) 485-0899
Enumeration date Aug 10, 2005
Last updated in NPPES Dec 17, 2019
Taxonomy & licenses
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 9712682 | Medicaid | MA | - |
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.
Frequently asked questions
Is NPI 1669474607 active?
Yes, as of the latest NPPES snapshot, NPI 1669474607 is active (record last updated 2019-12-17).
How do I verify Steven Sewall's NPI record?
Cross-check NPI 1669474607 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-12-17.