Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Kristin M O'Neil-Callahan, M.D.

Internal Medicine Physician in Peabody, MA · enumerated 2006.

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

National Provider Identifier

1215985445

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Registry record

Entity type Individual (Type 1)

Name Kristin M O'Neil-Callahan

Credential M.D.

Sex Female

Practice address 2 Essex Dr, Internal Medicine, Peabody, MA, 01960

Phone (978) 532-2800

Fax (978) 977-4492

Enumeration date May 4, 2006

Last updated in NPPES Jun 8, 2011

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 214128 (MA) Primary

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
214128	Other	MA	TUFTS
J25281	Other	MA	BLUE CROSS
4906511	Other	MA	CIGNA
AA8807	Other	MA	HARVARD PILGRIM
3574003	Other	MA	AETNA
0175111	Medicaid	MA	-
0027266	Other	MA	NEIGHBORHOOD HEALTH

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 1215985445 active?

Yes, as of the latest NPPES snapshot, NPI 1215985445 is active (record last updated 2011-06-08).

How do I verify Kristin O'Neil-Callahan's NPI record?

Cross-check NPI 1215985445 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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Maria Palermo Adult Health Nurse Practitioner · Peabody, MA NPI 1093771487 Irena Druzba-Lobsenz Internal Medicine Physician · Peabody, MA NPI 1417915554 Marvin Clopper Internal Medicine Physician · Peabody, MA NPI 1912965047 William Boyd Internal Medicine Physician · Peabody, MA NPI 1922066885 Mary Cunningham Internal Medicine Physician · Peabody, MA NPI 1013975457 Eileen Haley Internal Medicine Physician · Peabody, MA NPI 1780642983

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-06-08.