MICHAEL MANN CHAMBERLIN (M.D.) – Radiation Oncology Physician, NPI 1144541756
Radiation Oncology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
450 RADIATION ONCOLOGY in TX
Provider Addresses for MICHAEL MANN CHAMBERLIN (M.D.)
3851 Roger Brooke Drive, MCHE-QD (Creds)
Fort Sam Houston, TX 782346200
Phone: (240) 994-8227
Type: Location
1 JARRETT WHITE RD
TRIPLER ARMY MEDICAL CENTER, HI 968595001
Phone:
Type: Mailing
3851 ROGER BROOKE DRIVE, MCHE-QD (CREDS)
FORT SAM HOUSTON, TX 782346200
Phone:
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 2 Open Payments records for all available years, with a total value of $166.
Total Amount is formed as General ($166) + Research ($0) + Ownership ($0) = $166.
Last reported payment date: 2024-04-26 • Largest payer in this snapshot: E.R. Squibb & Sons, L.L.C. ($150).
Total Amount
$166
General + Research + Ownership
Payments
2
Total payment records
General Amount
$166
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-04-26
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| E.R. Squibb & Sons, L.L.C. | $150 |
| RxSight Inc | $16 |
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: 2021-05-05
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 |
|---|---|---|---|---|
| I20210505000622 | I | Radiation Oncology | HI | 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 | 81 | 32 | $0 |
| 77427 | Radiation treatment management, 5 treatment sessions | 19 | 17 | $0 |
Insurance plans in this area (ZIP 78234)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Radiation Oncology | HI |
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