Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Steven J Bos, MD

Emergency Medicine Physician in Portsmouth, NH · enumerated 2006.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1043385388

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Registry record

Entity type Individual (Type 1)

Name Steven J Bos

Credential MD

Sex Male

Practice address 333 Borthwick Ave, Portsmouth, NH, 03801

Phone (603) 433-4012

Fax (603) 433-5184

Enumeration date Nov 21, 2006

Last updated in NPPES May 15, 2008

Taxonomy & licenses

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License 6379 (NH) Primary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 6379 (NH) Secondary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
30009962	Medicaid	NH	-

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.

Read the full guide → Validate an NPI →

Frequently asked questions

How do I verify Steven Bos's NPI record?

Cross-check NPI 1043385388 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1043385388 active?

Yes, as of the latest NPPES snapshot, NPI 1043385388 is active (record last updated 2008-05-15).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-05-15.