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MEDFIELD INTERNAL MEDICINE, PLLC
NPI 1174364723
Internal Medicine in Medfield, MA

Active since June 05, 2024CLIA 22D0074096 · Accreditation
266 MAIN ST STE 4, MEDFIELD, MA 02052(508) 359-8141(508) 359-8005 Get Directions Write a Review

NPPES record last updated: October 2, 2024. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Oct 2, 2024, Jun 6, 2024 (2 updates tracked since 2024).

About Medfield Internal Medicine, Pllc NPPES

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

MEDFIELD INTERNAL MEDICINE, PLLC (NPI 1174364723) is a healthcare organization registered as an internal medicine in Medfield, Massachusetts and active in the NPI registry since June 2024. The organization holds an CLIA Accreditation certificate valid through December 22, 2027 and lists Russell E Kling, Physician/owner, as its authorized official.

NPPES Registry Identity

NPI1174364723
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameMEDFIELD INTERNAL MEDICINE, PLLC
Location Address266 MAIN ST STE 4Medfield, MA 02052-2018
Mailing Address266 Main St Ste 4Medfield, MA 02052-2018 · (508) 359-8141 · Fax (508) 359-8005
Phone(508) 359-8141
Fax(508) 359-8005
Organization SubpartNo
Authorized OfficialRussell E KlingPhysician/owner · (508) 359-8141
Enumeration DateJune 5, 2024
Last NPPES UpdateOctober 2, 20242 updates tracked since enumeration
NPPES CertifiedOctober 2, 2024
✔ NPI 1174364723 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
266 MAIN ST STE 4, Medfield, MA 02052
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Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Medfield Internal Medicine, Pllc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

4

Medicare enrollment records show 4 clinicians reassign Medicare billing to Medfield Internal Medicine, PLLC, which bills Medicare for the services they deliver. Of these, 3 practice at this address. They are listed nearest first.

Clinicians, nearest first (4)

Liane Helland, NP
Nurse Practitioner
NPI 1437657061
266 MAIN ST STE 4
Medfield, MA 02052
(508) 359-8141
✔ PECOS✔ Accepts MedicareSame address
Melissa Williams, CNP
Nurse Practitioner
NPI 1356934871
266 MAIN ST STE 4
Medfield, MA 02052
(508) 359-8141
✔ PECOSSame address
Russell Kling, MD
Internal Medicine
NPI 1497168983
266 MAIN ST STE 4
Medfield, MA 02052
(508) 359-8151
✔ PECOS✔ Accepts MedicareSame address
Aisling Zylberman
Nurse Practitioner
NPI 1962959205
43 KINGS TER
Pembroke, MA 02359
(781) 752-6028
✔ PECOS✔ Accepts Medicare26 mi

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

CLIA Laboratory Certificates CMS CLIA

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate of Accreditation 22D0074096

Medfield Internal Medicine · Medfield, MA
Active · expires Dec 22, 2027
CLIA Number22D0074096
Laboratory TypePhysician Office
Certificate Effective DateDecember 23, 2025
Certificate Expiration DateDecember 22, 2027
Laboratory DirectorRussell E. Kling
Laboratory Phone(508) 359-8141
Laboratory LocationMedfield Internal Medicine266 Main Street Bldg 1 Unit 4, Medfield, MA 02052
CLIA data matches this NPI record on: Name Phone
This is a certificate that is issued to a laboratory on the basis of the laboratory's accreditation by an accreditation organization approved by CMS.

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 Medfield Internal Medicine, PLLC's NPI number?

The NPI number for Medfield Internal Medicine, PLLC is 1174364723. It was assigned to this organization in the NPPES registry on June 5, 2024.

Where is Medfield Internal Medicine, PLLC located?

Medfield Internal Medicine, PLLC is located at 266 Main St Ste 4, Medfield, MA 02052. The listed phone number is (508) 359-8141.

What is Medfield Internal Medicine, PLLC's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Medfield Internal Medicine, PLLC enrolled in Medicare?

Yes. Medfield Internal Medicine, PLLC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Medfield Internal Medicine, PLLC?

According to the CMS Revalidation Reassignment List (October 2026 release), 4 clinicians in 2 Medicare specialties reassign their Medicare billing to Medfield Internal Medicine, PLLC. A 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 the clinician's services. The largest specialties are Nurse Practitioner (3) and Internal Medicine (1). Of these, 3 practice at this address. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Does Medfield Internal Medicine, PLLC hold a CLIA laboratory certificate?

Yes. A Certificate of Accreditation (number 22D0074096) is associated with this NPI, valid through December 22, 2027. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

When was this NPI record last updated?

The NPPES record for Medfield Internal Medicine, PLLC was last updated on October 2, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.