Dr. Robert L. Montgomery, M.D.
Joint Replacement Surgery (Adult Reconstructive Orthopaedic Surgery Physician)
- Medicare participating
At a glance
- Medical school
- University of California, Irvine, California College of Medicine (1987)
- Years since graduation
- 39
- In the NPI registry since
- 2005
- Medicare patients seen, 2024
- 500
Licensed in California since 1989, according to the Medical Board of California. We show license dates only for the states that publish them in bulk; see which states do. For other states, check the state medical board.
The NPI date is when this clinician registered for a National Provider Identifier, the billing number used on health claims. It is not a license, graduation or board-certification date. NPIs were first issued in May 2005 and became required on claims in 2007–2008, so an early date usually means the clinician was already in practice before then. What an NPI is
Education and training
- 1987Medical school: University of California, Irvine, California College of Medicine
- 2005Registered with an NPI (national billing number; not a license date) — NPIs began in 2005, so practice likely started earlier
Undergraduate school, residency, fellowship, licensing exams and board certification aren’t in public federal data. Board certification can be confirmed with the certifying board (ABMS member boards for MDs, AOA boards for DOs).
Specialties and state licenses
-
Adult Reconstructive Orthopaedic Surgery Physician primary
CA license G65982 (first issued 1989; current)
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Where they work
Hospitals
- Memorialcare Saddleback Medical Center Laguna Hills, CA
Medical groups
- Orthowest (47 clinicians)
Hospitals this clinician lists with Medicare, and groups they bill Medicare through (Care Compare). Affiliation doesn’t mean they see patients at every location.
Medicare patients and services
- Medicare patients, 2024
- 500
- Services billed
- 5,316
- Patients’ average age
- 77
| Service | Times | Patients |
|---|---|---|
| Injection, triamcinolone acetonide, not otherwise specified, 10 mg | 2,752 | 204 |
| Established patient office or other outpatient visit, 20-29 minutes | 571 | 364 |
| Aspiration and/or injection of fluid from large joint | 327 | 187 |
| Therapy procedure using functional activities | 325 | 23 |
| X-ray of knee, 4 or more views | 252 | 185 |
| Therapy procedure using manual technique, each 15 minutes | 160 | 20 |
| New patient office or other outpatient visit, 30-44 minutes | 147 | 147 |
| X-ray of knee, 1-2 views | 135 | 104 |
| X-ray of hip, 2-3 views | 88 | 66 |
| Hyaluronan or derivative, orthovisc, for intra-articular injection, per dose | 85 | 17 |
Medicare fee-for-service only. CMS leaves out services billed for fewer than 11 patients. These figures describe a practice’s Medicare work; they aren’t a measure of quality.
Medicare prescriptions
| Drug | Prescriptions |
|---|---|
| Meloxicam Other prescribers in Laguna Woods, CA | 744 |
| Hydrocodone-Acetaminophen (hydrocodone/acetaminophen) Other prescribers in Laguna Woods, CA | 105 |
| Gabapentin Other prescribers in Laguna Woods, CA | 42 |
| Tramadol Hcl Other prescribers in Laguna Woods, CA | 40 |
| Amoxicillin Other prescribers in Laguna Woods, CA | 24 |
| Oxycodone-Acetaminophen (oxycodone hcl/acetaminophen) Other prescribers in Laguna Woods, CA | 20 |
| Celecoxib Other prescribers in Laguna Woods, CA | 19 |
| Ibuprofen Other prescribers in Laguna Woods, CA | 17 |
| Xarelto (rivaroxaban) Other prescribers in Laguna Woods, CA | 15 |
| Naloxone Hcl Other prescribers in Laguna Woods, CA | 12 |
Prescriptions filled under Medicare Part D, including refills. CMS leaves out drugs prescribed fewer than 11 times.
Payments from drug and device companies
In 2025, 1 companies reported 1 payments worth $65.89 in total to this clinician.
| Stryker Corporation | $65.89 |
|---|
| Food and Beverage | $65.89 |
|---|
From CMS Open Payments. A payment is not evidence of wrongdoing; many are for consulting, teaching or meals. Clinicians can review and dispute their records with CMS.