William Allen Rumack, M.D.
Orthopaedic Surgery Physician · West Hills, CA
William Allen Rumack, M.D. is an orthopaedic surgery physician with a practice address in West Hills, California, and NPI 1740257542, issued on Mar 1, 2006. Check the license (California A79561, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- William Allen Rumack
- Credential
- M.D.
- Primary taxonomy
- Orthopaedic Surgery Physician 207X00000X
- License numbers
- A79561 CA
DR38255 CO
K2785 TX
Self-reported in NPPES; status is on the state search - Practice location
- 7345 Medical Center Dr, West Hills, CA 91307
- Phone
- (818) 888-2855
- Enumerated
- Mar 1, 2006
- Record last updated
- May 11, 2023
- Fax
- (818) 888-0702
- Medicaid ID
- W8424 CA
- Medicare enrollment
- Enrolled (PECOS I20060306000682); accepts Medicare assignment
- Medical or professional school
- University Of Colorado School Of Medicine, Denver, 1996
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest orthopaedic surgery physician records → All 2,276 in California → Look up another NPI →
Also registered at 7345 Medical Center Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Bob Armin, M.D.Otolaryngology Physician1790960888
- Sandra Baik, DOPediatrics Physician1447325758
- James Chow, MDGynecology Physician1609986454
- Alen Cohen, M.D.Facial Plastic Surgery Physician1003934258
- John Collier, MDObstetrics & Gynecology Physician1497714885
- Phaedra Deukmedjian, DDS MSPediatric Dentistry1821214784
Verify William Allen Rumack in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A79561Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
31% more Medicare Part D claims than the average orthopaedic surgery physician in 2024
452 Medicare Part D claims for 199 beneficiaries, against an average of 346 among the 16,516 providers of this specialty who prescribed in Part D. 33 claims were for opioids.
Most prescribed
- Meloxicam270 claims
- Celecoxib84 claims
- Oxycodone-Acetaminophen18 claims
- Diclofenac Sodium11 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The MIPS final score for 2023 (Medicare payment program): 7.5 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $58.19
2 payments; by number, the most common kind was food and beverage; the largest payer was Djo, LLC. The 15,003 providers of this specialty with any payment received $23,022.89 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Professional Orthopedics Medical Associates A Prof Medical CorpWest Hills, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Allen Rumack among 2,276 orthopaedic surgery physician records in California
William Allen Rumack, M.D. is one of 2,276 orthopaedic surgery physician records with a practice address in California. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 10% of them.
- NPI issued2006 · 10% of these records are older, 46% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated1996 · median 2003 among the 1,347 with a school on file
- Record last updated2023 · 66% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207X00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Orthopaedic Surgery Physician providers in California
There are 2,276 orthopaedic surgery physician records in California.
All 2,276 in California → Every provider in West Hills → Orthopaedic Surgery Physician nationwide →
The 8 orthopaedic surgery physician records with the nearest ZIP codes
- Bernard Diamond, MDWest Hills, CA 913071154315000
- Taylor Hobson, M.D.West Hills, CA 913071104357763
- Michael Lee, M.D.West Hills, CA 913071013994896
- Johnny Li, M.D.West Hills, CA 913071124004965
- Kevin Nadel, M.D.West Hills, CA 913071407822935
- Robert Samson, M.D.Calabasas, CA 913021407999170
- Keith Brookenthal, MDEncino, CA 913161437118163
- Clifford Kahn, M.D.Encino, CA 913161619958626
Common questions
What is William Allen Rumack, M.D.'s NPI number?
William Allen Rumack, M.D.'s National Provider Identifier (NPI) is 1740257542, issued on Mar 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William Allen Rumack, M.D. located?
The NPPES record lists a practice address at 7345 Medical Center Dr, West Hills, CA, 91307. Phone: (818) 888-2855. Providers update this record themselves, so call before visiting.
How can I verify William Allen Rumack, M.D.'s license?
NPPES lists California license number A79561, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William Allen Rumack, M.D. prescribe under Medicare Part D?
In 2024, William Allen Rumack, M.D. had 452 Medicare Part D claims for 199 beneficiaries; the average among orthopaedic surgery physician prescribers was 346. Part D covers Medicare prescriptions only.
What is William Allen Rumack, M.D.'s MIPS final score?
The 2023 MIPS final score is 7.5 of 100. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.