DR. JOHN THOMAS GREGG (M. D.) – Surgery Physician, NPI 1184605917
Surgery Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
747 EMERGENCY MEDICINE in OK
Provider Addresses for DR. JOHN THOMAS GREGG (M. D.)
8800 Tall Oaks Dr
Guthrie, OK 730446139
Phone: (806) 348-1468
Type: Location
Perry Memorial Hospital
Perry, OK 73077
Phone: (806) 346-1468
Type: Location
Hereford Regional Medical Center, 540, West 15th Street, Hereford, Deaf Smith County, Texas, 79045, United States
HEREFORD, TX 790452820
Phone: (806) 364-7512
Fax: (806) 349-9377
Type: Location
109, Douglas Street, Hereford, Deaf Smith County, Texas, 79045, United States
HEREFORD, TX 790454019
Phone: (806) 364-7512
Fax: (806) 349-9377
Type: Mailing
SHARE MEDICAL CENTER
ALVA, OK 73717
Phone: (806) 346-1468
Type: Location
8800 TALL OAKS DR
GUTHRIE, OK 730446139
Phone: (806) 346-1468
Type: Mailing
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: 2006-04-27
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 |
|---|---|---|---|---|
| I20051229000730 | I | Emergency Medicine | OK | TBD |
| I20060427000693 | I | General Surgery | 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 |
|---|---|---|---|---|
| 99284 | Emergency department visit with moderate level of medical decision making | 68 | 63 | $0 |
| 99285 | Emergency department visit with high level of medical decision making | 35 | 33 | $0 |
| 99283 | Emergency department visit with low level of medical decision making | 33 | 32 | $0 |
| 45380 | Biopsy of large bowel using a flexible endoscope | 13 | 13 | $0 |
Insurance plans in this area (ZIP 73044)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Family Practice | FL | |
| Family Practice, Emergency Medicine | IA | |
| Nurse Practitioner | OK | |
| Emergency Medicine | OK | |
| Emergency Medicine | MI | |
| Emergency Medicine | FL | |
| Nurse Practitioner | TX | |
| Nurse Practitioner | OK | |
| General Practice, Emergency Medicine | OK | |
| Family Practice | OK |
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