KAREN BRENNAN (CRNA) – Registered Nurse, NPI 1023162328
Preparing for Medicare enrollment?
Use our CMS-855 prep checklist: which form applies (855I, 855O, or 855A), readiness score, NPPES field map, and Section 12 documents. Reassignment uses CMS-855I Section 4F—not the discontinued CMS-855R form.
Open Medicare 855 Prep tool →Registered Nurse
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
Loading map...
Provider Addresses for KAREN BRENNAN (CRNA)
12, Douglas Street, Dorchester Heights, South Boston, Boston, Suffolk County, Massachusetts, 02127, United States
#2
SOUTH BOSTON, MA 021274105
Phone:
Type: Mailing
6, Glen Cove Drive, Rockport, Knox County, Maine, 04856, United States
ROCKPORT, ME 048564240
Phone: (207) 921-8215
Fax: (207) 921-5302
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
Loading prescription activity...
Open Payments (CMS)
CMS reports 6 Open Payments records for all available years, with a total value of $336.
Total Amount is formed as General ($336) + Research ($0) + Ownership ($0) = $336.
Last reported payment date: 2024-04-04 • Largest payer in this snapshot: GENZYME CORPORATION ($121).
Total Amount
$336
General + Research + Ownership
Payments
6
Total payment records
General Amount
$336
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-04-04
Latest reported date
Top Companies
Largest payers in this snapshot
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
No Medicare enrollment or revalidation data available for this provider in our database.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 00811 | Anesthesia for other procedure on large bowel using an endoscope | 128 | 128 | $0 |
| 00812 | Anesthesia for exam of colon using an endoscope | 76 | 76 | $0 |
| 00731 | Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope | 51 | 51 | $0 |
| 00813 | Anesthesia for procedure on small and large bowel using an endoscope | 14 | 14 | $0 |
Insurance plans in this area (ZIP 02127)
Loading plans...
Group practice members
| Name | Specialty | State |
|---|---|---|
| - | MA | |
| A N E S T H E S I O L O G Y | NY | |
| Certified Registered Nurse Anesthetist (Crna) | MA | |
| A N E S T H E S I O L O G Y | MA | |
| A N E S T H E S I O L O G Y | MA | |
| Certified Registered Nurse Anesthetist (Crna) | MA | |
| A N E S T H E S I O L O G Y | MA | |
| Certified Registered Nurse Anesthetist (Crna) | MA | |
| A N E S T H E S I O L O G Y | MA | |
| Certified Registered Nurse Anesthetist (Crna) | MA |
Reviews
All reviews are moderated before publication. Reviews reflect users' opinions; we do not verify the accuracy of individual reviews.
No reviews yet. Be the first to share your experience — your opinion helps families compare providers.