NPPES file of Aug 9, 2026

Karen Pak, NP

Nurse Practitioner · Boston, MA

Karen Pak, NP is a nurse practitioner with a practice address in Boston, Massachusetts, and NPI 1508610676, issued on Apr 15, 2024. Check the license with the Massachusetts board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1508610676
Name
Karen Pak
Credential
NP
Primary taxonomy
Nurse Practitioner 363L00000X
License number
11676 MN
Self-reported in NPPES; status is on the state search
Practice location
450 Brookline Ave, Boston, MA 02215
Phone
(617) 632-2140
Enumerated
Apr 15, 2024
Record last updated
Jul 29, 2026
Medicare enrollment
Enrolled (PECOS I20240819000264); accepts Medicare assignment
Telehealth
Offers telehealth (CMS)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest nurse practitioner records → All 3,480 in Massachusetts → Look up another NPI →

Also registered at 450 Brookline Ave

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Gregory Abel, MDHematology & Oncology Physician1285611954
  2. Lara Abousamra, PHARMDPharmacist Clinician (PhC)/ Clinical Pharmacy Specialist1851183404
  3. Karley Adams, PAPhysician Assistant1578261764
  4. Lauren Adams, PA-CPhysician Assistant1902763469
  5. Ana Aguilar-Bonilla, M.D.Pediatric Hematology & Oncology Physician1023319761
  6. Andrew Aguirre, MD, PHDMedical Oncology Physician1609071208

Verify Karen Pak in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Massachusetts board licenses this professionCheck the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the Massachusetts license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Bills Medicare through one group practice

  1. Mayo ClinicRochester, MN

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Karen Pak among 3,480 nurse practitioner records in Massachusetts

Karen Pak, NP is one of 3,480 nurse practitioner records with a practice address in Massachusetts. 71% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2024, is newer than 91% of them.

  • NPI issued2024 · 91% of these records are older, 5% newer
  • In a Medicare fileYes · 71% of these records are
  • In the CMS Doctors and Clinicians fileYes · 56% of these records are
  • Graduated2024 · median 2017 among the 1,963 with a school on file
  • Record last updated2026 · 52% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363L00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

961 nurse practitioner records list a practice address in Boston

They are 961 of the 41,865 NPPES records with a practice address in Boston, and 3,480 nurse practitioner records in Massachusetts.

All 3,480 in Massachusetts → Every provider in Boston → Nurse Practitioner nationwide →

The 8 nurse practitioner records with the nearest ZIP codes

  1. Lois Bartels, NPBoston, MA 022151811078868
  2. Maura Brain, MS, RNCBoston, MA 022151003824392
  3. Lorraine Britting, NPCBoston, MA 022151053399238
  4. Deidre Buckley, NPBoston, MA 022151790858975
  5. Diane Chase, NPBoston, MA 022151780653980
  6. Sigal Dagiely, NPBoston, MA 022151295813509
  7. Judith Ferraro, CRNPBoston, MA 022151215007356
  8. Jan Fleischman, MSN, RN, APN, BCBoston, MA 022151144320912

Common questions

What is Karen Pak, NP's NPI number?

Karen Pak, NP's National Provider Identifier (NPI) is 1508610676, issued on Apr 15, 2024. An NPI identifies a provider in billing; it is not a license.

Where is Karen Pak, NP located?

The NPPES record lists a practice address at 450 Brookline Ave, Boston, MA, 02215. Phone: (617) 632-2140. Providers update this record themselves, so call before visiting.

How can I verify Karen Pak, NP's license?

Search the Massachusetts board that licenses this profession; the NPPES record confirms identity only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.