CROIX FOSSUM (M.D.) – Radiation Oncology Physician, NPI 1104351006
Radiation Oncology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
677 RADIATION ONCOLOGY in CA
Provider Addresses for CROIX FOSSUM (M.D.)
769 Medical Center Ct
Chula Vista, CA 919116602
Phone: (619) 502-5851
Fax: (619) 502-5865
Type: Location
5555 Grossmont Center Dr
LA Mesa, CA 919423019
Phone: (619) 740-4500
Fax: (619) 740-8499
Type: Location
DEPT 338 PO BOX 509015
SAN DIEGO, CA 921509015
Phone:
Type: Mailing
3075 HEALTH CENTER DR
SAN DIEGO, CA 921232773
Phone: (858) 939-5010
Fax: (858) 939-5021
Type: Location
1884 67TH ST NW
ROCHESTER, MN 559018822
Phone:
Type: Mailing
50, North Medical Drive, Salt Lake City, Salt Lake County, Utah, 84113, United States
SALT LAKE CITY, UT 841320001
Phone: (801) 581-2121
Type: Location
PO BOX 509015
DEPT 338
SAN DIEGO, CA 921509015
Phone:
Type: Mailing
7901 FROST ST
SAN DIEGO, CA 921232701
Phone: (858) 939-5010
Fax: (858) 939-5021
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 21 Open Payments records for all available years, with a total value of $692.
Total Amount is formed as General ($692) + Research ($0) + Ownership ($0) = $692.
Last reported payment date: 2024-12-19 • Largest payer in this snapshot: icotec Medical Inc. ($123).
Total Amount
$692
General + Research + Ownership
Payments
21
Total payment records
General Amount
$692
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-19
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| icotec Medical Inc. | $123 |
| Astellas Pharma US Inc | $75 |
| Intuitive Surgical, Inc. | $67 |
| Janssen Biotech, Inc. | $53 |
| Dendreon Pharmaceuticals LLC | $34 |
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: 2022-07-01
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 |
|---|---|---|---|---|
| I20220701002784 | I | Radiation Oncology | CA | 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 |
|---|---|---|---|---|
| 77014 | Ct guidance for insertion of radiation therapy fields | 829 | 66 | $0 |
| 77427 | Radiation treatment management, 5 treatment sessions | 179 | 53 | $0 |
| 77300 | Calculation of radiation therapy dose | 142 | 40 | $0 |
| 77334 | Design and construction of complex radiation treatment device | 77 | 39 | $0 |
| 77263 | Complex radiation therapy planning | 41 | 39 | $0 |
Insurance plans in this area (ZIP 91911)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Radiation Oncology | CA | |
| Radiation Oncology | CA | |
| Radiation Oncology | FL | |
| Radiation Oncology | CA | |
| Radiation Oncology | CA | |
| Radiation Oncology | CA | |
| - | CA | |
| Radiation Oncology | CA |
Reviews
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