DR. WILLIAM ALLEN RUMACK M.D.
NPI 1740257542
Orthopaedic Surgery in West Hills, CA

Q: What is William Rumack's NPI number?

The NPI number for William Rumack is 1740257542. It was assigned to this individual provider in the NPPES registry on March 1, 2006.

Q: What is William Rumack's specialty?

The primary specialty registered for this NPI is Orthopaedic Surgery with taxonomy code 207X00000X.

Q: When was this NPI record last updated?

The NPPES record for William Rumack was last updated on May 11, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since March 01, 2006PECOS EnrolledAccepts Medicare Assignment

7.5/100

CMS Quality Rating

7345 MEDICAL CENTER DR, SUITE #280, WEST HILLS, CA 91307(818) 888-2855(818) 888-0702 Get Directions Write a Review

NPPES record last updated: May 11, 2023. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: May 11, 2023, Dec 16, 2021, Mar 17, 2018 and 2 more (5 updates tracked since 2017).

On this page

About Dr. William Allen Rumack M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. WILLIAM ALLEN RUMACK M.D. (NPI 1740257542) is an individual orthopaedic surgery provider in West Hills, California, licensed in California (A79561) and active in the NPI registry since March 2006. He is enrolled in Medicare PECOS and is a graduate of University Of Colorado School Of Medicine, Denver (1996).

NPPES Registry Identity

NPI1740257542

Entity TypeIndividualMale

Primary Taxonomy207X00000X

Provider Legal NameDR. WILLIAM ALLEN RUMACKCredential: M.D.

Location Address7345 MEDICAL CENTER DR, SUITE #280West Hills, CA 91307-1937

Mailing Address7345 Medical Center Dr, Suite #280West Hills, CA 91307-1937 · (818) 888-2855 · Fax (818) 888-0702

Phone(818) 888-2855

Fax(818) 888-0702

Sole ProprietorYes

Medical School CMSUniversity Of Colorado School Of Medicine, DenverGraduated 1996

Enumeration DateMarch 1, 2006

Last NPPES UpdateMay 11, 20235 updates tracked since enumeration

NPPES CertifiedMay 11, 2023

✔ NPI 1740257542 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOrthopaedic SurgeryAllopathic & Osteopathic Physicians

Taxonomy Code207X00000X

Licenses✔ Licensed in CA · A79561✔ Licensed in TX · K2785✔ Licensed in CO · DR38255

Definition

An orthopaedic surgeon is trained in the preservation, investigation and restoration of the form and function of the extremities, spine and associated structures by medical, surgical and physical means. An orthopaedic surgeon is involved with the care of patients whose musculoskeletal problems include congenital deformities, trauma, infections, tumors, metabolic disturbances of the musculoskeletal system, deformities, injuries and degenerative diseases of the spine, hands, feet, knee, hip, shoulder and elbow in children and adults. An orthopaedic surgeon is also concerned with primary and secondary muscular problems and the effects of central or peripheral nervous system lesions of the musculoskeletal system.

7345 MEDICAL CENTER DR, West Hills, CA 91307

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Other Identifiers 8

Other1104410001CA · Medicare Dme Supplier #

Other955118CA · Qme #

OtherDR 38255CO · Medical Board Of Colorado

OtherA79561CA · Medical Board Of Ca

OtherK2785TX · Medical Board Of Texas

MedicaidW8424CA

OtherWA79561BCA · Medicare Performing

Other953718732CA · Tax Id #

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. William Allen Rumack M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID7012923667

PECOS Enrollment IDI20060306000682

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show William Rumack reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Professional Orthopedics Medical Associates A Prof Medical Corp

Same address

Orthopaedic Surgery

7345 MEDICAL CENTER DR, SUITE #280
West Hills, CA 91307

Reassigned Medicare billing, California enrollment
3 clinicians in this Medicare group

NPI 1255362687 (818) 888-2855

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 29

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Hyaluronan or derivative, gelsyn-3, for intra-articular injection, 0.1 mg J7328

Gelsyn-3 is a treatment involving injections of a substance called hyaluronan into the joint space. Hyaluronan is naturally present in healthy joint fluid, aiding in lubrication and shock absorption. This treatment helps relieve joint pain, often in conditions like osteoarthritis.

6,553 services11 patients

Therapy procedure using exercise to develop strength, endurance, range of motion, and flexibility, each 15 minutes 97110

This therapy involves exercises to boost strength, endurance, flexibility, and range of motion. Each session lasts 15 minutes. The goal is to improve physical function and overall health. It's a safe, beneficial method for enhancing well-being and fitness.

1,911 services67 patients

Injection, dexamethasone sodium phosphate, 1 mg J1100

Dexamethasone sodium phosphate is a medication given via injection. It is a type of steroid that helps reduce inflammation and immune responses. It can be used to treat a variety of conditions, such as allergies, skin conditions, arthritis, and more.

992 services152 patients

Application of electrical stimulation with therapist present, each 15 minutes 97032

Electrical stimulation is a therapeutic treatment that sends light electrical pulses to a specific area of your body. This is done under the supervision of a therapist for 15-minute intervals. It can reduce pain, stimulate muscles, and improve circulation.

471 services55 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

430 services240 patients

Aspiration and/or injection of fluid large joint using ultrasound guidance 20611

This procedure involves using ultrasound technology to accurately locate a large joint, usually the knee or shoulder. A needle is then inserted to either extract fluid (aspiration) or inject medication. The ultrasound helps ensure precision and safety.

372 services151 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

315 services218 patients

X-ray of knee, 3 views 73562

An X-ray of the knee, 3 views, is a non-invasive imaging test. It uses a small amount of radiation to produce images of the knee from three different angles. This helps medical professionals to diagnose and monitor conditions like arthritis, fractures, or infections. The process is quick and painless.

226 services154 patients

Hyaluronan or derivative, hyalgan, supartz or visco-3, for intra-articular injection, per dose J7321

Hyaluronan or derivatives like Hyalgan, Supartz, or Visco-3, are used in intra-articular injections for joint pain relief. They help by improving joint lubrication, reducing inflammation, and promoting tissue healing. Each dose is administered directly into the joint space.

138 services22 patients

X-ray of shoulder, minimum of 2 views 73030

An X-ray of the shoulder, with a minimum of 2 views, is a non-invasive imaging test. It uses a small amount of radiation to produce images of your shoulder bones. This helps in diagnosing conditions like fractures, arthritis, or other abnormalities. The procedure is quick and painless.

130 services83 patients

X-ray of lower and sacral spine, 2-3 views 72100

An X-ray of the lower and sacral spine involves capturing images of your lower back area, including the tailbone. This procedure helps in identifying problems like fractures, infections, or deformities. 2-3 different angle views provide a comprehensive picture.

124 services114 patients

Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more 99212

This is a routine check-up for patients who have previously seen the doctor. During this 10-19 minute visit, the doctor will review your health status, discuss any concerns, and manage ongoing treatments or medications. It's a chance to ensure your health is on track.

111 services83 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

103 services103 patients

Evaluation for physical therapy, typically 20 minutes 97161

An evaluation for physical therapy is a short, 20-minute assessment where your physical condition, mobility, and pain levels are examined. This helps in designing a personalized therapy plan to enhance your physical function and well-being.

74 services57 patients

X-ray of hip, 2-3 views 73502

An X-ray of the hip with 2-3 views is a non-invasive imaging test. It uses a small amount of radiation to produce pictures of the hip joint. These images help in diagnosing conditions like fractures, arthritis, or other abnormalities. The process is quick and painless.

73 services58 patients

X-ray of wrist, minimum of 3 views 73110

An X-ray of the wrist, minimum of 3 views, is a diagnostic procedure that uses radiation to create images of your wrist from different angles. This helps detect fractures, infections, or other abnormalities for accurate diagnosis and treatment planning.

69 services32 patients

X-ray of hand, minimum of 3 views 73130

An X-ray of the hand, minimum of 3 views, is a non-invasive imaging test. It uses a small amount of radiation to produce images of the bones in your hand from different angles. This helps in diagnosing fractures, infections, arthritis, or other abnormalities. It's quick and painless.

60 services45 patients

X-ray of upper spine, 2-3 views 72040

An X-ray of the upper spine, with 2-3 views, is a painless procedure that employs a small amount of radiation to capture images of your neck and upper back. It assists in diagnosing conditions like arthritis, fractures, or spinal deformities.

53 services52 patients

X-ray of ankle, minimum of 3 views 73610

An ankle X-ray is a quick, painless imaging test. It involves capturing at least three different images or 'views' of your ankle using small amounts of radiation. These images help identify any abnormalities or injuries, such as fractures or arthritis.

51 services29 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

50 services50 patients

X-ray of elbow, 2 views 73070

An elbow X-ray, 2 views, is a quick, painless imaging test. It uses a small amount of radiation to produce detailed images of your elbow from two different angles. This helps in diagnosing conditions like fractures, infection, or arthritis. It's a safe and effective way to monitor your elbow health.

29 services18 patients

X-ray of foot, minimum of 3 views 73630

An X-ray of the foot, minimum of 3 views, is a non-invasive imaging test. It uses a small amount of radiation to produce images of the bones and tissues in your foot. This helps to identify fractures, infections, or other abnormalities. Multiple views ensure a comprehensive examination.

29 services24 patients

Injection into tendon or ligament 20550

An injection into a tendon or ligament involves placing medication directly into these areas to help reduce inflammation and pain. It's often used for conditions like arthritis or tendonitis. The procedure is quick and usually involves a local anesthetic.

22 services20 patients

X-ray of knee, 1-2 views 73560

An X-ray of the knee with 1-2 views is a quick, painless test that produces images of the knee bones. It helps identify fractures, infections, or changes in the knee joint. During the procedure, you'll be asked to stay still while the X-ray machine captures the images.

18 services13 patients

Removal of extensive shoulder joint tissue using an endoscope 29823

This procedure, known as arthroscopic debridement, involves using a small camera (endoscope) to view your shoulder joint. Damaged or unwanted tissue is then carefully removed. This minimally invasive technique aims to reduce pain and improve joint mobility.

15 services14 patients

Shaving of part of shoulder bone and repair of ligament using an endoscope 29826

This procedure involves using a tiny camera, called an endoscope, to view and repair a damaged shoulder ligament. Simultaneously, a small portion of the shoulder bone is shaved to alleviate discomfort and improve movement. It's a minimally invasive technique that aids in a quicker recovery.

15 services14 patients

Repair of shoulder rotator cuff using an endoscope 29827

This procedure, known as arthroscopic rotator cuff repair, helps fix tears in the shoulder's rotator cuff. An endoscope, a small camera, is used to view the shoulder inside. Using small tools, the surgeon repairs the torn tissue. This minimally invasive approach often leads to a quicker recovery.

15 services14 patients

Removal of cyst or growth of thigh bone 27355

This procedure involves the surgical removal of an abnormal growth or cyst from your thigh bone. The doctor makes an incision, accesses the bone, and carefully removes the growth. This helps alleviate pain, prevent further complications, and improve bone health.

13 services13 patients

Replacement of knee joint, both sides of knee 27447

A bilateral knee joint replacement is a procedure where the damaged parts of both your knee joints are replaced with artificial parts. It aims to relieve pain and improve mobility. The process involves a surgical operation under anesthesia.

12 services12 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 91307 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$96.36 typical visit price

range $62.96 – $187.60

Typical copayment $24.09 (range $15.74 – $46.90)

Most-billed visit code 99203

Established Patient

$77.96 typical visit price

range $20.84 – $153.61

Typical copayment $19.49 (range $5.21 – $38.40)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

7.5/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Individually scored

Quality

Improvement Activities

Referred Medical Equipment & Supplies CMS DME claims 2

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Shoulder orthosis, acromio/clavicular (canvas and webbing type), prefabricated, off-the-shelf L3670

DME-Orthotic Devices · category DF000N

1 supplier22 claims22 services$105.58 avg. paid by Medicare

Wrist hand orthosis, wrist extension control cock-up, non molded, prefabricated, off-the-shelf L3908

DME-Orthotic Devices · category DF000N

1 supplier25 claims27 services$60.85 avg. paid by Medicare

Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. ALEN N COHEN M.D.

Otolaryngology (Facial Plastic Surgery)

7345 MEDICAL CENTER DR, SUITE 540
WEST HILLS, CA 91307

Los Angeles County (818) 888-7878

DR. MICHAEL LEE M.D.

Orthopaedic Surgery

7345 MEDICAL CENTER DR, SUITE #280
WEST HILLS, CA 91307

Los Angeles County (818) 888-2855

DR. CHRISTOPHER NEMER HAGE M.D.

Internal Medicine

7345 MEDICAL CENTER DR, SUITE 220
WEST HILLS, CA 91307

Los Angeles County (818) 702-9962

DR. JOHNNY T LI M.D.

Orthopaedic Surgery

7345 MEDICAL CENTER DR, SUITE #280
WEST HILLS, CA 91307

Los Angeles County (818) 888-2855

JEROME DICKMAN, M.D., INC

Clinic/Center (Medical Specialty)

7345 MEDICAL CENTER DR, SUITE 510
WEST HILLS, CA 91307

Los Angeles County (818) 340-3444

PROFESSIONAL ORTHOPEDICS MEDICAL ASSOCIATES A PROF MEDICAL CORP

Orthopaedic Surgery

7345 MEDICAL CENTER DR, SUITE #280
WEST HILLS, CA 91307

Los Angeles County (818) 888-2855

MARSHALL MICHAEL GRADITOR M.D.

Specialist

7345 MEDICAL CENTER DR, SUITE #320
WEST HILLS, CA 91307

Los Angeles County (818) 704-7766

SHERVIN AMINPOUR MD PC

Otolaryngology (Facial Plastic Surgery)

7345 MEDICAL CENTER DR, 540
WEST HILLS, CA 91307

Los Angeles County (310) 877-4321

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is William Rumack's NPI number?

The NPI number for William Rumack is 1740257542. It was assigned to this individual provider in the NPPES registry on March 1, 2006.

Where is William Rumack located?

William Rumack practices at 7345 Medical Center Dr Suite #280, West Hills, CA 91307. The listed phone number is (818) 888-2855.

What is William Rumack's specialty?

The primary specialty registered for this NPI is Orthopaedic Surgery with taxonomy code 207X00000X.

Is William Rumack enrolled in Medicare?

Yes. William Rumack is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organization bills Medicare for William Rumack's services?

According to the CMS Revalidation Reassignment List (October 2026 release), William Rumack reassigns Medicare benefits to Professional Orthopedics Medical Associates A Prof Medical Corp (West Hills, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for William Rumack's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for William Rumack was last updated on May 11, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.