DR. LARRY A. GRISSOM (M.D.) – Diagnostic Radiology Physician, NPI 1164400644
Diagnostic Radiology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
Provider Addresses for DR. LARRY A. GRISSOM (M.D.)
800 PEAKWOOD DR
SUITE 5E
HOUSTON, TX 770902900
Phone: (281) 440-5158
Fax: (281) 440-8549
Mailing address matches the actual address.
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
No Open Payments data available for this provider.
This can happen when there are no reportable CMS Open Payments records.
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: 2007-11-13
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 |
|---|---|---|---|---|
| I20071113000771 | I | Diagnostic Radiology | TX | 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 |
|---|---|---|---|---|
| 77067 | Screening mammography | 364 | 364 | $0 |
| 77063 | Screening 3d breast mammography | 363 | 363 | $0 |
| 77080 | Dxa bone density measurement of hip, pelvis, spine | 103 | 103 | $0 |
| G0279 | Diagnostic digital breast tomosynthesis, unilateral or bilateral (list separately in addition to 77065 or 77066) | 60 | 60 | $0 |
| 76641 | Complete ultrasound scan of 1 breast | 51 | 50 | $0 |
Insurance plans in this area (ZIP 77090)
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Provider's Procedures
Group practice members
| Name | Specialty | State |
|---|---|---|
| Diagnostic Radiology | TX | |
| Diagnostic Radiology | TX | |
| Interventional Radiology | MA | |
| Physician Assistant | FL | |
| Physician Assistant | TX | |
| Diagnostic Radiology | TX | |
| Diagnostic Radiology | TX | |
| Diagnostic Radiology | TX | |
| Diagnostic Radiology | TX | |
| Interventional Radiology | TX |
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