What is Kathleen Lambert's NPI number?

Kathleen Lambert's National Provider Identifier (NPI) is 1205833555, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Kathleen Lambert's specialty?

Kathleen Lambert is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).

Where is Kathleen Lambert located?

Kathleen Lambert's practice location on file with NPPES is 57 Bedford St, Lexington, MA 02420-4500.

What is Kathleen Lambert's phone number?

The practice phone number listed in the NPPES registry for Kathleen Lambert is (781) 868-7500.

Is Kathleen Lambert's NPI active?

Yes — Kathleen Lambert's NPI (1205833555) is active in the NPPES registry as of the last update on 2007-07-08.

IndividualActive

Kathleen Lambert, MD

NPI 1205833555 · Internal Medicine Physician · Lexington, MA

Kathleen Lambert, MD is a Internal Medicine Physician provider in Lexington, MA (NPI 1205833555).

Provider details

NPI number: 1205833555
Entity type: Individual
Primary specialty: Internal Medicine PhysicianAllopathic & Osteopathic Physicians
Credential: MD
Sex: Female
License: 155110 (MA)

Specialties & taxonomies

Internal Medicine PhysicianPrimary207R00000XLicense 155110 (MA)
Allopathic & Osteopathic Physicians

Profile Score

Detailed profile(91/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure38% of score
20 yrs in NPPES registry
Profile completeness38% of score
100% of core fields populated
Practice footprint23% of score
1 documented practice location

Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.

Practice location

57 Bedford St

Ste 130

Lexington, MA 02420-4500

Phone: (781) 868-7500

Fax: (781) 861-1409

Street-level locationGet directions

More MA providers

Mailing address

1 Arsenal Market Pl

Watertown, MA 02472-5018

Enumerated: 2005-07-01
Last updated: 2007-07-08

Frequently asked questions

What is Kathleen Lambert's NPI number?: Kathleen Lambert's National Provider Identifier (NPI) is 1205833555, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
What is Kathleen Lambert's specialty?: Kathleen Lambert is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
Where is Kathleen Lambert located?: Kathleen Lambert's practice location on file with NPPES is 57 Bedford St, Lexington, MA 02420-4500.
What is Kathleen Lambert's phone number?: The practice phone number listed in the NPPES registry for Kathleen Lambert is (781) 868-7500.
Is Kathleen Lambert's NPI active?: Yes — Kathleen Lambert's NPI (1205833555) is active in the NPPES registry as of the last update on 2007-07-08.

Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.