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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Jillian C. Grigoryan-Koster, M.D.

Hospitalist Physician in Concord, NH · enumerated 2015.

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

National Provider Identifier

1225419385

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Registry record

Entity type Individual (Type 1)
Name Dr. Jillian C. Grigoryan-Koster
Credential M.D.
Sex Female
Practice address 250 Pleasant St, Concord, NH, 03301
Phone (603) 227-7000
Fax (603) 227-7191
Enumeration date Jun 15, 2015
Last updated in NPPES Sep 12, 2018

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 18862 (NH) Secondary
208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians · License 18862 (NH) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD 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.

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Frequently asked questions

Is NPI 1225419385 active?
Yes, as of the latest NPPES snapshot, NPI 1225419385 is active (record last updated 2018-09-12).
How do I verify Jillian Grigoryan-Koster's NPI record?
Cross-check NPI 1225419385 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 2018-09-12.