KAREN E KLEIN M.D.
NPI 1154309235
Pediatrics in Boston, MA

Q: What is Karen Klein's NPI number?

The NPI number for Karen Klein is 1154309235. It was assigned to this individual provider in the NPPES registry on January 9, 2006.

Q: What is Karen Klein's specialty?

The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.

Q: When was this NPI record last updated?

The NPPES record for Karen Klein was last updated on October 28, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since January 09, 2006PECOS Enrolled

165 DARTMOUTH ST, BOSTON, MA 02116(617) 859-5470(617) 859-5059 Get Directions Write a Review

NPPES record last updated: October 28, 2020. Verified against the NPPES registry weekly; last sync: October 25, 2026.

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About Karen E Klein M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

KAREN E KLEIN M.D. (NPI 1154309235) is an individual pediatrics provider in Boston, Massachusetts, licensed in Massachusetts (45931) and active in the NPI registry since January 2006. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1154309235

Entity TypeIndividualFemale

Primary Taxonomy208000000X

Provider Legal NameKAREN E KLEINCredential: M.D.

Location Address165 DARTMOUTH STBoston, MA 02116-5123

Mailing Address165 Dartmouth StBoston, MA 02116-5123 · (617) 859-5470 · Fax (617) 859-5059

Phone(617) 859-5470

Fax(617) 859-5059

Sole ProprietorNo

Enumeration DateJanuary 9, 2006

Last NPPES UpdateOctober 28, 2020

NPPES CertifiedOctober 28, 2020

✔ NPI 1154309235 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians

Taxonomy Code208000000X

License✔ Licensed in MA · 45931

Definition

A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development.

165 DARTMOUTH ST, Boston, MA 02116

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Other Identifiers 5

Other0015148MA · Neighborhood Health

OtherE05814MA · Blue Cross

Medicaid0166464MA

OtherPP364MA · Harvard Pilgrim

Other045931MA · Tufts

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Karen E Klein M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Karen Klein reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Atrius Health, Inc.

Same address

Internal Medicine

165 DARTMOUTH ST
Boston, MA 02116

Reassigned Medicare billing, Massachusetts enrollment
1,317 clinicians in this Medicare group

NPI 1841413887 (617) 859-5000

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 02116 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$97.64 typical visit price

range $63.72 – $189.86

Typical copayment $24.41 (range $15.93 – $47.46)

Most-billed visit code 99203

Established Patient

$111.18 typical visit price

range $21.07 – $155.29

Typical copayment $27.79 (range $5.26 – $38.82)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MACKENZIE CASEY FNP-BC, RN

Nurse Practitioner (Primary Care)

165 DARTMOUTH ST
BOSTON, MA 02116

Suffolk County (617) 859-5000

JANICE MARIE MICALE NP

Nurse Practitioner (Pediatrics)

165 DARTMOUTH ST
BOSTON, MA 02116

Suffolk County (617) 859-5000

MEGAN MAYS NP

Nurse Practitioner (Adult Health)

165 DARTMOUTH ST
BOSTON, MA 02116

Suffolk County (617) 859-5250

LINDA M COHEN M.D.

Pediatrics

165 DARTMOUTH ST
BOSTON, MA 02116

Suffolk County (617) 859-5470

DR. ELISABETH BROOKER MORRAY PH.D.

Psychologist

165 DARTMOUTH ST, HARVARD VANGUARD MEDICAL ASSOCIATES COPLEY
BOSTON, MA 02116

Suffolk County (617) 859-5170

ANNE L KREKIS NP

Nurse Practitioner (Family)

165 DARTMOUTH ST
BOSTON, MA 02116

Suffolk County (617) 859-5000

RUNNA FAYEZ MOUSSA-PERVANE MD

Internal Medicine

165 DARTMOUTH ST, INTERNAL MEDICINE
BOSTON, MA 02116

Suffolk County (617) 859-5101

DAWN OSBORNE M.D.

Internal Medicine

165 DARTMOUTH ST, INTERNAL MEDICINE
BOSTON, MA 02116

Suffolk County (617) 859-5101

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Karen Klein's NPI number?

The NPI number for Karen Klein is 1154309235. It was assigned to this individual provider in the NPPES registry on January 9, 2006.

Where is Karen Klein located?

Karen Klein practices at 165 Dartmouth St, Boston, MA 02116. The listed phone number is (617) 859-5470.

What is Karen Klein's specialty?

The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.

Is Karen Klein enrolled in Medicare?

Yes. Karen Klein is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Karen Klein's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Karen Klein reassigns Medicare benefits to Atrius Health, Inc. (Boston, MA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Karen Klein's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Karen Klein was last updated on October 28, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.