STEPHEN ANDREW MIHALCIK (M.D., PH.D.) – Radiation Oncology Physician, NPI 1598031205
Radiation Oncology Physician
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Profile Insights
NPPES metrics only — not quality of care.
255 RADIATION ONCOLOGY in MA
Provider Addresses for STEPHEN ANDREW MIHALCIK (M.D., PH.D.)
100 Blossom St
Boston, MA 021142606
Phone: (617) 724-1548
Type: Location
55 FRUIT ST
BOSTON, MA 021142696
Phone: (617) 726-7646
Type: Location
700 COMMERCE DR
STE 500
OAK BROOK, IL 605238736
Phone: (617) 732-6230
Type: Mailing
4455 WEAVER PKWY
WARRENVILLE, IL 60555
Phone: (630) 821-6400
Fax: (888) 543-6118
Type: Location
55 Fruit St
Boston, MA 021142696
Phone: (617) 726-7646
Type: Location
131 Old Road To 9 Acre Cor
Concord, MA 017424181
Phone: (978) 287-3436
Type: Location
75 FRANCIS ST
BOSTON, MA 021156110
Phone: (617) 732-6310
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 3 Open Payments records for all available years, with a total value of $459.
Total Amount is formed as General ($459) + Research ($0) + Ownership ($0) = $459.
Last reported payment date: 2024-04-10 • Largest payer in this snapshot: IBA Proton Therapy, Inc. ($442).
Total Amount
$459
General + Research + Ownership
Payments
3
Total payment records
General Amount
$459
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-04-10
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| IBA Proton Therapy, Inc. | $442 |
| Mevion_Medical_Systems_Inc | $17 |
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: 2025-07-01
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 |
|---|---|---|---|---|
| I20170807000751 | I | Radiation Oncology | IL | TBD |
| I20250701002368 | I | Radiation Oncology | 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 |
|---|---|---|---|---|
| G6002 | Stereoscopic x-ray guidance for localization of target volume for the delivery of radiation therapy | 949 | 210 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 151 | 136 | $0 |
| 77427 | Radiation treatment management, 5 treatment sessions | 120 | 62 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 66 | 53 | $0 |
| 77300 | Calculation of radiation therapy dose | 61 | 28 | $0 |
Insurance plans in this area (ZIP 02114)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Radiation Oncology | NC | |
| Radiation Oncology | LA | |
| Radiation Oncology | IL | |
| Radiation Oncology | IL | |
| Radiation Oncology | IL | |
| Radiation Oncology | PA | |
| Radiation Oncology | FL | |
| Radiation Oncology | IL | |
| Radiation Oncology | IL | |
| Radiation Oncology | IL |
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