DR. GREGORY TENNANT (D.O.) – Orthopaedic Surgery Physician, NPI 1073581385
Orthopaedic Surgery Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
3,024 ORTHOPEDIC SURGERY in CA
Provider Addresses for DR. GREGORY TENNANT (D.O.)
42135 10TH ST W STE 101
LANCASTER, CA 935347099
Phone: (661) 726-5005
Fax: (661) 726-5377
Type: Mailing
Sierra Avenue, Fontana, San Bernardino County, California, 92377, United States
SCPMG, DEPT ORTHOPEDICS
FONTANA, CA 923356720
Phone: (909) 427-5000
Type: Location
511,511 1/2, Narcissus Avenue, Corona del Mar Village, Corona del Mar, Newport Beach, Orange County, California, 92625, United States
UNIT B
CORONA DEL MAR, CA 926252416
Phone: (949) 439-8001
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 11 Open Payments records for all available years, with a total value of $498.
Total Amount is formed as General ($498) + Research ($0) + Ownership ($0) = $498.
Last reported payment date: 2024-10-03 • Largest payer in this snapshot: Nevro Corp. ($174).
Total Amount
$498
General + Research + Ownership
Payments
11
Total payment records
General Amount
$498
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-10-03
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Nevro Corp. | $174 |
| Medtronic, Inc. | $169 |
| Stryker Corporation | $73 |
| Avanos Medical | $26 |
| ABBVIE INC. | $25 |
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: 2005-09-23
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 |
|---|---|---|---|---|
| I20050923000643 | I | Orthopedic Surgery | 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 |
|---|---|---|---|---|
| J3301 | Injection, triamcinolone acetonide, not otherwise specified, 10 mg | 474 | 43 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 108 | 69 | $0 |
| 20611 | Aspiration and/or injection of fluid large joint using ultrasound guidance | 93 | 43 | $0 |
| J1885 | Injection, ketorolac tromethamine, per 15 mg | 90 | 25 | $0 |
| 99222 | Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 64 | 64 | $0 |
Insurance plans in this area (ZIP 93534)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Osteopathic Manipulative Medicine, Physical Medicine And Rehabilitation | CA | |
| Nurse Practitioner | WA | |
| C H I R O P R A C T I C | CA | |
| P O D I A T R Y | CA | |
| Orthopedic Surgery | CA | |
| Sports Medicine, Orthopedic Surgery | CA | |
| Nurse Practitioner | CA | |
| - | CA | |
| Orthopedic Surgery | CA | |
| Hand Surgery, Plastic And Reconstructive Surgery | CA |
Reviews
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