DR. ELENI NICOLE NACKOS (MD) – Hematology & Oncology Physician, NPI 1023339819
Hematology & Oncology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
86 HEMATOLOGY/ONCOLOGY in ME
Provider Addresses for DR. ELENI NICOLE NACKOS (MD)
15 Rock Row Ste 110
Westbrook, ME 040924877
Phone: (207) 303-3300
Type: Location
11 ROCK ROW STE 320
WESTBROOK, ME 040924877
Phone: (207) 303-3300
Fax: (207) 250-2139
Type: Location
PO BOX 911
BRATTLEBORO, VT 053020911
Phone: (207) 303-3200
Fax: (207) 250-2140
Type: Mailing
105 TOPSHAM FAIR MALL RD UNIT 1
TOPSHAM, ME 04086
Phone: (207) 303-3300
Fax: (207) 250-2137
Type: Location
2 Independence Dr
Kennebunk, ME 040436078
Phone: (207) 303-3300
Fax: (207) 250-2144
Type: Location
105 Topsham Fair Mall Rd Unit 1
Topsham, ME 04086
Phone: (207) 303-3300
Fax: (207) 250-2137
Type: Location
11 Rock Row Ste 120
Westbrook, ME 040924877
Phone: (207) 303-3300
Fax: (207) 250-2139
Type: Location
11 Rock Row Ste 150
Westbrook, ME 040924877
Phone: (207) 303-3300
Fax: (207) 250-2139
Type: Location
155 Borthwick Ave Ste C
Portsmouth, NH 038017156
Phone: (603) 828-0100
Fax: (603) 828-0111
Type: Location
11 ROCK ROW STE 120
WESTBROOK, ME 040924877
Phone: (207) 303-3300
Fax: (207) 250-2139
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 11 Open Payments records for all available years, with a total value of $5,541.
Total Amount is formed as General ($5,541) + Research ($0) + Ownership ($0) = $5,541.
Last reported payment date: 2024-08-21 • Largest payer in this snapshot: PFIZER INC. ($3,375).
Total Amount
$5,541
General + Research + Ownership
Payments
11
Total payment records
General Amount
$5,541
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-08-21
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| PFIZER INC. | $3,375 |
| AstraZeneca Pharmaceuticals LP | $1,943 |
| Daiichi Sankyo Inc. | $81 |
| ABBVIE INC. | $59 |
| Pharmacyclics LLC, an AbbVie Company | $50 |
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: 2020-03-23
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking 2 Medicare enrollment records; no due dates published yet.
Enrollment records
2
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 |
|---|---|---|---|---|
| I20160603001608 | I | Hematology/Oncology | ME | TBD |
| I20200323000231 | I | Hematology/Oncology | NH | 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 |
|---|---|---|---|---|
| J0897 | Injection, denosumab, 1 mg | 2,340 | 17 | $0 |
| J1100 | Injection, dexamethasone sodium phosphate, 1 mg | 706 | 28 | $0 |
| J9395 | Injection, fulvestrant, 25 mg | 630 | 14 | $0 |
| 80053 | Blood test, comprehensive group of blood chemicals | 629 | 284 | $0 |
| 85025 | Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count | 621 | 277 | $0 |
Insurance plans in this area (ZIP 04092)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| HEMATOLOGY/ONCOLOGY | ME | 96375 | Injection of different drug or substance into a vein for therapy, diagnosis, or prevention | 383 | 50 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| Hospice/Palliative Care | ME | |
| Clinical Social Worker | ME | |
| Nurse Practitioner | VT | |
| Nurse Practitioner | ME | |
| Internal Medicine | ME | |
| Hematology/Oncology, Internal Medicine | NH | |
| Nurse Practitioner | ME | |
| Nurse Practitioner | ME | |
| Radiation Oncology | ME | |
| H E M A T O L O G Y/ O N C O L O G Y | ME |
Reviews
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