DR. KAROLINA BROOK M.D.
NPI 1144635897
Anesthesiology in Boston, MA
About Dr. Karolina Brook M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. KAROLINA BROOK M.D. (NPI 1144635897) is an individual anesthesiology provider in Boston, Massachusetts, licensed in Massachusetts (274519) and active in the NPI registry since June 2014. She is enrolled in Medicare PECOS, is affiliated with Boston Medical Center, and maintains a secondary practice location in Westwood.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 1
Other Identifiers 2
Accepted Insurance
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
Dr. Karolina Brook M.d. 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.
Medicare Billing Reassignments
3Medicare enrollment records show Karolina Brook reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Boston, MA 02118
- Reassigned Medicare billing, Massachusetts enrollment
- 102 clinicians in this Medicare group
Boston, MA 02111
- Reassigned Medicare billing, Massachusetts enrollment
- 246 clinicians in this Medicare group
Milton, MA 02186
- Reassigned Medicare billing, Massachusetts enrollment
- 556 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Boston Medical Center
Acute Care Hospitals · Boston, MAOther Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
BOSTON, MA 02118
BOSTON, MA 02118
BOSTON, MA 02118
BOSTON, MA 02118
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 Karolina Brook's NPI number?
The NPI number for Karolina Brook is 1144635897. It was assigned to this individual provider in the NPPES registry on June 20, 2014.
Where is Karolina Brook located?
Karolina Brook practices at 1 Boston Medical Ctr Pl, Boston, MA 02118. The listed phone number is (617) 638-6950.
What is Karolina Brook's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is Karolina Brook enrolled in Medicare?
Yes. Karolina Brook 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 Karolina Brook's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Karolina Brook reassigns Medicare benefits to 3 organizations: Boston University Medical Center Anesthesiologists, Inc. (Boston, MA), Pratt Anesthesiology Associates, Inc (Boston, MA) and Associated Physicians Of Harvard Medical Faculty Physicians At Beth Is (Milton, MA). 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 Karolina Brook's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Karolina Brook accept?
Health plans from Taro Health and WellSense Health Plan list Karolina Brook as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Karolina Brook affiliated with any hospitals?
According to CMS data, Karolina Brook is affiliated with Boston Medical Center.
When was this NPI record last updated?
The NPPES record for Karolina Brook was last updated on March 9, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.
# Dr. Karolina Brook, M.D. · NPI 1144635897
Anesthesiology physician in Boston, Massachusetts. Individual provider, active in the CMS NPPES registry since June 20, 2014.
## Identity
- **NPI:** 1144635897 (Entity type: Individual)
- **Enumerated:** June 20, 2014
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** 274519 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 1 BOSTON MEDICAL CTR PL, Boston, MA 02118-2908
- **Phone:** (617) 638-6950 · **Fax:** (617) 638-6966
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 3 organizations under Medicare reassignment (form CMS-855R): Boston University Medical Center Anesthesiologists, Inc. (NPI 1952874737, Boston, MA); Pratt Anesthesiology Associates, Inc (NPI 1326085390, Boston, MA); Associated Physicians Of Harvard Medical Faculty Physicians At Beth Is (NPI 1245773308, Milton, MA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Harvard Medical School, class of 2014
## Record status
- **NPPES last updated:** March 9, 2026
- **Other identifiers:** Medicaid 110105198A (MA); Medicaid 3114530 (NH)
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Source: [NPI Profile](https://npiprofile.com/npi/1144635897) · Data from the CMS NPPES public registry.