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KAREN PAK NP
NPI 1508610676
Nurse Practitioner in Boston, MA

Active since April 15, 2024PECOS EnrolledAccepts Medicare Assignment
450 BROOKLINE AVE, BOSTON, MA 02215(617) 632-2140 Get Directions Write a Review

NPPES record last updated: July 29, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jul 29, 2026, May 11, 2026, Oct 11, 2024 and 2 more (5 updates tracked since 2024).

About Karen Pak Np NPPES

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

KAREN PAK NP (NPI 1508610676) is an individual nurse practitioner in Boston, Massachusetts, licensed in Minnesota (11676) and active in the NPI registry since April 2024. She is enrolled in Medicare PECOS, is affiliated with Mayo Clinic Hospital Rochester, and is a graduate of Other (2024).

NPPES Registry Identity

NPI1508610676
Entity TypeIndividualFemale
Primary Taxonomy363L00000X
Provider Legal NameKAREN PAKCredential: NP
Location Address450 BROOKLINE AVEBoston, MA 02215-5450
Mailing Address450 Brookline AveBoston, MA 02215-5450 · (617) 632-2140 · Fax (617) 632-6624
Phone(617) 632-2140
Sole ProprietorNo
Medical School CMSOtherGraduated 2024
Enumeration DateApril 15, 2024
Last NPPES UpdateJuly 29, 20265 updates tracked since enumeration
NPPES CertifiedJuly 29, 2026
✔ NPI 1508610676 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363L00000X
License✔ Licensed in MN · 11676
Definition
(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision making and direct accountability for clinical judgment across the health care continuum or in a certified specialty. (2) A registered nurse who has completed additional training beyond basic nursing education and who provides primary health care services in accordance with state nurse practice laws or statutes. Tasks performed by nurse practitioners vary with practice requirements mandated by geographic, political, economic, and social factors. Nurse practitioner specialists include, but are not limited to, family nurse practitioners, gerontological nurse practitioners, pediatric nurse practitioners, obstetric-gynecologic nurse practitioners, and school nurse practitioners.
450 BROOKLINE AVE, Boston, MA 02215
Open in Google Maps ↗

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Karen Pak Np is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID4981142270
PECOS Enrollment IDI20240819000264
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 Reassignments

2

Medicare enrollment records show Karen Pak reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Dana-Farber Cancer Institute, Inc.
Same address
General Acute Care Hospital
450 BROOKLINE AVE
Boston, MA 02215
  • Reassigned Medicare billing, Massachusetts enrollment
  • 1,026 clinicians in this Medicare group
NPI 1851333686 (617) 632-3000
Mayo Clinic
1,082 mi
Infectious Disease
200 1ST ST SW
Rochester, MN 55905
  • Reassigned Medicare billing, Minnesota enrollment
  • 6,534 clinicians in this Medicare group
NPI 1114343860 (507) 284-2511

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

Areas of Expertise CMS Part B claims

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
16 services16 patients

Hospital Affiliations CMS Care Compare 3

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Mayo Clinic Hospital Rochester

Acute Care Hospitals · Rochester, MN
5/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number240010
Location1216 Second Street SouthwestRochester, MN 55902 · Olmsted County
Emergency services Birthing friendly

Mayo Clinic Health System In Red Wing

Acute Care Hospitals · Red Wing, MN
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number240018
Location701 Hewitt BoulevardRed Wing, MN 55066 · Goodhue County
Emergency services Birthing friendly

Mayo Clinic Health System - Lake City

Critical Access Hospitals · Lake City, MN
OwnershipVoluntary non-profit - Private
CMS Certification Number241338
Location500 West Grant StreetLake City, MN 55041 · Wabasha County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 02215 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.

PRABHSIMRANJOT SINGH MD
Internal Medicine (Hematology & Oncology)
450 BROOKLINE AVE
BOSTON, MA 02215
Suffolk County (617) 582-7956
SHAWN MAGUIRE PA-C
Physician Assistant
450 BROOKLINE AVE
BOSTON, MA 02215
Suffolk County (617) 582-8487
KARINA FRANCA
Genetic Counselor, MS
450 BROOKLINE AVE
BOSTON, MA 02215
Suffolk County (857) 215-2285
DR. SUZANNE JAQUETH FORREST M.D.
Pediatrics (Pediatric Hematology-Oncology)
450 BROOKLINE AVE
BOSTON, MA 02215
Suffolk County (617) 632-3270
LAUREN KIRITSY MSW, LCSW
Counselor (Mental Health)
450 BROOKLINE AVE
BOSTON, MA 02215
Suffolk County (857) 215-3448
OFIR WOLAJ MD
Internal Medicine (Hematology & Oncology)
450 BROOKLINE AVE, DANA 2058
BOSTON, MA 02215
Suffolk County (617) 632-6139
JASON BATALHA AGPCNP-BC
Nurse Practitioner
450 BROOKLINE AVE
BOSTON, MA 02215
Suffolk County (617) 632-6140
FATIMA EMRAN AMIR MS, LGC
Genetic Counselor, MS
450 BROOKLINE AVE
BOSTON, MA 02215
Suffolk County (617) 632-3729

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 Pak's NPI number?

The NPI number for Karen Pak is 1508610676. It was assigned to this individual provider in the NPPES registry on April 15, 2024.

Where is Karen Pak located?

Karen Pak practices at 450 Brookline Ave, Boston, MA 02215. The listed phone number is (617) 632-2140.

What is Karen Pak's specialty?

The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.

Is Karen Pak enrolled in Medicare?

Yes. Karen Pak is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Karen Pak's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Karen Pak reassigns Medicare benefits to 2 organizations: Dana-Farber Cancer Institute, Inc. (Boston, MA) and Mayo Clinic (Rochester, MN). Each 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 Pak's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Karen Pak affiliated with any hospitals?

According to CMS data, Karen Pak is affiliated with Mayo Clinic Hospital Rochester, Mayo Clinic Health System In Red Wing and Mayo Clinic Health System - Lake City.

When was this NPI record last updated?

The NPPES record for Karen Pak was last updated on July 29, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 months 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.