Gregory Tennant, D.O.
NPI 1073581385 · Orthopaedic Surgery Physician · Lancaster, CA
Enrolled with Medicare as Practitioner - Orthopedic Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregory Tennant, D.O. is a Orthopaedic Surgery Physician provider in Lancaster, CA (NPI 1073581385).
Provider details
- NPI number
- 1073581385
- Entity type
- Individual
- Primary specialty
- Orthopaedic Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 20A9121 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
461 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 81 | $98 |
| Aspiration And/Or Injection of Fluid Large Joint Using Ultrasound Guidance20611 | 80 | $114 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 55 | $136 |
| X-Ray of Knee, 3 Views73562 | 41 | $46 |
| X-Ray of Wrist, Minimum of 3 Views73110 | 27 | $47 |
| Aspiration And/Or Injection of Fluid From Large Joint20610 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 7 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Meloxicam | 141 | 112 |
| Oxycodone Hcl/Acetaminophenbrand: Oxycodone-Acetaminophen | 75 | 55 |
| Diclofenac Sodium | 25 | 22 |
| Cephalexin | 14 | — |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 14 | 12 |
| Ibuprofen | 13 | — |
| Lidocaine | 11 | — |
These counts cover prescriptions paid through Medicare Part D in 2024 — they include cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means , never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$119 across 6 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-03-10
- Last updated
- 2023-08-10
- Certified
- 2023-08-10
Frequently asked questions
- What is Gregory Tennant's NPI number?
- Gregory Tennant's National Provider Identifier (NPI) is 1073581385, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Tennant's specialty?
- Gregory Tennant is listed in the NPPES registry with a primary specialty of Orthopaedic Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Gregory Tennant located?
- Gregory Tennant's practice location on file with NPPES is 42135 10th St W Ste 101, Lancaster, CA 93534-7099.
- What is Gregory Tennant's phone number?
- The practice phone number listed in the NPPES registry for Gregory Tennant is (661) 726-5005.
- Does Gregory Tennant accept Medicare?
- Gregory Tennant is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gregory Tennant's NPI active?
- Yes — Gregory Tennant's NPI (1073581385) is active in the NPPES registry as of the last update on 2023-08-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.