Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Robert James Seiler, D.O.

Obstetrics & Gynecology Physician in Nashua, NH · enumerated 2006 · practices at Dartmouth-Hitchcock Clinic.

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

National Provider Identifier

1831159847

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Registry record

Entity type Individual (Type 1)

Name Dr. Robert James Seiler

Credential D.O.

Sex Male

Practice address 2300 Southwood Dr, Nashua, NH, 03063

Phone (603) 577-2560

Fax (603) 640-1228

Enumeration date Mar 24, 2006

Last updated in NPPES Jun 29, 2026

Taxonomy & licenses

207V00000X Obstetrics & Gynecology Physician Allopathic & Osteopathic Physicians · License 5101013921 (MI) Secondary

207V00000X Obstetrics & Gynecology Physician Allopathic & Osteopathic Physicians · License 39785 (NH) Primary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

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

Is NPI 1831159847 active?

Yes, as of the latest NPPES snapshot, NPI 1831159847 is active (record last updated 2026-06-29).

How do I verify Robert Seiler's NPI record?

Cross-check NPI 1831159847 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-06-29.