CAITLIN O'CALLAGHAN REEN (NP) – Adult Health Nurse Practitioner, NPI 1033391685
Adult Health Nurse Practitioner
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
8,971 NURSE PRACTITIONER in MA
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Provider Addresses for CAITLIN O'CALLAGHAN REEN (NP)
73, Chelsea Street, Charlestown, Boston, Suffolk County, Massachusetts, 02129, United States
APARTMENT 307
CHARLESTOWN, MA 021292039
Phone:
Type: Mailing
Massachusetts General Hospital, 55, Fruit Street, Beacon Hill, Boston, Suffolk County, Massachusetts, 02114, United States
GRAY / BIGELOW 800, MAILSTOP 843
BOSTON, MA 021142621
Phone: (617) 724-0122
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 131 Open Payments records for all available years, with a total value of $30,397.
Total Amount is formed as General ($30,397) + Research ($0) + Ownership ($0) = $30,397.
Last reported payment date: 2024-12-24 • Largest payer in this snapshot: Edwards Lifesciences Corporation ($23,118).
Total Amount
$30,397
General + Research + Ownership
Payments
131
Total payment records
General Amount
$30,397
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-24
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Edwards Lifesciences Corporation | $23,118 |
| Medtronic, Inc. | $3,681 |
| Boston Scientific Corporation | $2,188 |
| Abbott Laboratories | $1,410 |
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2008-04-03
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20080403000282 | I | Nurse Practitioner | MA | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
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 |
|---|---|---|---|---|
| 93000 | Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | 51 | 50 | $0 |
| 99215 | Established patient office or other outpatient visit, 40-54 minutes | 45 | 45 | $0 |
| 99205 | New patient office or other outpatient visit, 60-74 minutes | 15 | 15 | $0 |
Insurance plans in this area (ZIP 02129)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| G A S T R O E N T E R O L O G Y | MA | |
| Diagnostic Radiology | MA | |
| Nephrology, Internal Medicine | MA | |
| Nurse Practitioner | MA | |
| P A T H O L O G Y | NY | |
| P A T H O L O G Y | MA | |
| P S Y C H I A T R Y | MA | |
| Cardiac Electrophysiology, Internal Medicine, Cardiovascular Disease (Cardiology) | MA | |
| H E M A T O L O G Y/ O N C O L O G Y | MA | |
| N E U R O L O G Y | MA |
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