Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Jessica A Krass, NP

Nurse Practitioner in Lexington, MA · enumerated 2013 · practices at Lahey Clinic, Inc..

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

National Provider Identifier

1558709477

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Registry record

Entity type Individual (Type 1)

Name Jessica A Krass

Credential NP

Sex Female

Practice address 16 Hayden Ave, Lahey Health Primary, Lexington, Lexington, MA, 02421

Phone (781) 372-7100

Fax (781) 372-7111

Enumeration date Jun 13, 2013

Last updated in NPPES Mar 27, 2018

Taxonomy & licenses

363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License RN2306399 (MA) Primary

NP · Nurse Practitioner: An advanced practice registered nurse with graduate training, licensed to diagnose and treat, often with prescriptive authority. About the NP credential

Other identifiers

Identifier	Type	State	Issuer
130904000113	Other	NY	FIDELIS CARE NY
03594429	Medicaid	NY	-

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

Where does Jessica Krass practice?

The practice location on file with NPPES is in Lexington, MA. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Jessica Krass?

The National Provider Identifier (NPI) for Jessica Krass is 1558709477, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-03-27.