Dr. William Rumack, M.D.
What this data tells you about Dr. Rumack
Dr. William Rumack is an orthopedic surgery specialist in West Hills, CA, with 20 years of NPI registration. Based on federal Medicare data, Dr. Rumack performed 7,225 Medicare services across 1,850 unique beneficiaries.
Between the years covered by Open Payments, Dr. Rumack received a total of $1,632 from 22 pharmaceutical and/or device companies across 56 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in orthopedic surgery. Most payments are for meals and travel — low-value interactions common across virtually all practicing physicians. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Rumack is Very High — reflecting how much public federal data is available about this provider. Patients are encouraged to use this data as one of several factors when choosing a healthcare provider.
Medicare Practice Summary
Medicare Utilization ↗Top procedures by volume
Ranked by number of services performed for Medicare patients. Avg. submitted charge is what the provider billed; avg. Medicare payment is what CMS paid.
| Procedure | Volume | Avg. paid | Avg. submitted |
|---|---|---|---|
| Physical therapy exercise, per 15 min A therapy session using exercises to improve strength, endurance, range of motion, and flexibility. Each 15-minute unit is billed separately. |
1,977 | $21 | $39 |
| Hyaluronan intra-articular injection, 1 mg An injection of hyaluronan or its derivative into a joint space. This procedure delivers 1 mg of the substance directly into the affected joint. |
1,161 | $8 | $15 |
| Dexamethasone injection (steroid) An injection of dexamethasone sodium phosphate, a corticosteroid medication, administered in a dose of 1 milligram. |
919 | $0 | $0 |
| Electrical stimulation therapy, per 15 minutes Application of electrical stimulation to the body with a therapist present. The service is billed for each 15-minute increment of treatment. |
631 | $9 | $18 |
| Office visit, established patient (20-29 min) An office visit for an existing patient lasting between 20 and 29 minutes. The visit involves medical evaluation and management of the patient's condition. |
437 | $74 | $130 |
| Ultrasound-guided large joint aspiration or injection This procedure uses ultrasound imaging to guide the removal of fluid from or the injection of medication into a large joint. |
362 | $98 | $206 |
| Office visit, established patient (30-39 min) A follow-up office visit for an existing patient lasting between 30 and 39 minutes. The visit involves medical evaluation and management of the patient's condition. |
269 | $105 | $188 |
| Knee X-ray, 3 views An X-ray imaging test of the knee joint that captures three different angles to evaluate the bones and surrounding structures. |
238 | $35 | $56 |
| Viscosupplementation injection for joint An injection of hyaluronic acid or a derivative into a joint to provide lubrication and cushioning. |
172 | $58 | $134 |
| Shoulder X-ray, 2+ views An X-ray imaging test of the shoulder joint using at least two different angles to visualize the bones and surrounding structures. |
153 | $31 | $48 |
| Office visit, established patient (10-19 min) An office visit for an existing patient lasting 10 to 19 minutes. The visit involves medical evaluation and management of the patient's condition. |
137 | $48 | $88 |
| New patient office visit (45-59 min) An initial office visit for a new patient lasting between 45 and 59 minutes. This code covers the total time spent by the physician or qualified healthcare professional on the date of the encounter. |
115 | $130 | $248 |
| X-ray of lower and sacral spine, 2-3 views An X-ray imaging test that captures 2 to 3 views of the lower back and sacral spine to visualize the bones and joints in this area. |
113 | $36 | $54 |
| Hip X-ray, 2-3 views An X-ray imaging test of the hip joint using two to three different angles to visualize the bones and surrounding structures. |
69 | $42 | $68 |
| Wrist X-ray, minimum 3 views An imaging test using X-rays to capture at least three different angles of the wrist bones and joints. |
67 | $36 | $57 |
| X-ray of hand, minimum of 3 views An X-ray imaging test of the hand that captures at least three different angles to visualize the bones and joints. |
63 | $33 | $54 |
| Evaluation for physical therapy, typically 20 minutes | 59 | $81 | $129 |
| X-ray of upper spine, 2-3 views An X-ray imaging test of the upper spine using two to three different angles to visualize the bones and structures. |
56 | $35 | $54 |
| Ankle X-ray, minimum 3 views An X-ray imaging test of the ankle that captures at least three different angles to evaluate the bones and joints. |
46 | $30 | $48 |
| Foot X-ray, 3+ views An X-ray imaging test of the foot that captures at least three different views to evaluate the bones and joints. |
39 | $29 | $49 |
| Elbow X-ray, 2 views An X-ray imaging test of the elbow joint using two different angles to visualize the bones and surrounding structures. |
37 | $25 | $42 |
| New patient office visit (30-44 min) An initial office visit for a new patient lasting between 30 and 44 minutes. This code is used when the total time spent on the date of the encounter falls within this range. |
33 | $88 | $162 |
| Tendon or ligament injection A procedure involving the injection of medication into a tendon or ligament. |
20 | $49 | $87 |
| Ultrasound-guided joint aspiration or injection Removal of fluid from or injection into a medium-sized joint using ultrasound guidance to ensure accurate placement. |
19 | $73 | $135 |
| Rib X-ray, 2 views An X-ray imaging test of the ribs on one side of the body using two different angles. |
17 | $34 | $50 |
| Ultrasound guidance for needle placement Use of ultrasound imaging to guide the precise placement of a needle during a medical procedure. |
16 | $48 | $104 |
Industry Payment Transparency
Open Payments through 2024 ↗Payment profile
Industry payments classified by relationship type. Not all payments are equal — research and consulting reflect different relationships than speaking programs or meals.
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
Payments by company (2024)
All-time payments by company (2018-2024) ›
Associated products mentioned in payments ›
Most payments (100%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians.
Geographic Context
0.0 mi
Data Sources
| Provider Registry | ✓ NPPES | Weekly updates |
| Medicare Enrollment | ✓ PECOS | Monthly updates |
| Practice Data | ✓ Medicare Util. | Annual (CY lag) |
| Industry Payments | ✓ Open Payments | CY 2024 |
| Disciplinary History | — Not public | N/A |
This provider has data in 4 of 4 available federal datasets, with a Data Coverage level of Very High. This reflects how much public data is available about a provider. How we calculate this →
Summary
Dr. Rumack is a mixed practice specialist, with above-average Medicare volume (top 6% in CA), with low-engagement industry engagement, with 20 years of NPI registration.
This summary is auto-generated from federal data, describing data availability and patterns. Read our methodology →
Frequently Asked Questions
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All data on this page is sourced verbatim from public federal records published by the U.S. Centers for Medicare & Medicaid Services (CMS): NPPES ↗, Open Payments ↗, Medicare Provider Utilization ↗, and PECOS. Publication is mandated by the Physician Payments Sunshine Act (§6002 ACA, 42 U.S.C. §1320a-7h) and the Freedom of Information Act.
This page is not medical advice, an endorsement, a recommendation, or a quality rating. Data Coverage reflects data completeness — how much federal information exists for this provider — not clinical performance, patient outcomes, or quality of care. Always verify information directly with the provider and consult a licensed clinician before making medical decisions.
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