Zachary Mark Working, MD
Orthopaedic Trauma Physician · Portland, OR
Zachary Mark Working, MD is an orthopaedic trauma physician with a practice address in Portland, Oregon, and NPI 1790051084, issued on Mar 30, 2012. Check the license (Oregon MD188610, as entered in NPPES) on the Oregon Medical Board; the Medicare figures below come from public CMS files.
- Name
- Zachary Mark Working
- Credential
- MD
- Primary taxonomy
- Orthopaedic Trauma Physician 207XX0801X
- License numbers
- MD188610 OR
A148264 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3181 SW Sam Jackson Park RD, Portland, OR 97239
- Phone
- (503) 494-6400
- Enumerated
- Mar 30, 2012
- Record last updated
- Aug 21, 2024
- Medicare enrollment
- Enrolled (PECOS I20180823000503); accepts Medicare assignment
- Medical or professional school
- University Of Pittsburgh School Of Medicine, 2012
- Entity
- Type 1 · individual
8 nearest orthopaedic trauma physician records → All 12 in Oregon → Look up another NPI →
Also registered at 3181 SW Sam Jackson Park RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Alex AamodtCritical Care Medicine Registered Nurse1154257590
- Jefferson Abaricia, MD, PHDStudent in an Organized Health Care Education/Training Program1073215711
- Kenneth Abbey, MDAnesthesiology Physician1588779342
- Matthew Abbott, PA-CMedical Physician Assistant1154738003
- Ayah Abdelsalam Megahed, MD, MSCVascular & Interventional Radiology Physician1023503596
- Obada Abdulrazzak, MDStudent in an Organized Health Care Education/Training Program1598567430
Verify Zachary Mark Working in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOregon Medical Board
Search for license MD188610Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
89% fewer Medicare Part D claims than the average orthopaedic trauma physician in 2024
17 Medicare Part D claims, against an average of 151 among the 627 providers of this specialty who prescribed in Part D.
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): 97.8 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: $1,398.51
6 payments; by number, the most common kind was food and beverage; the largest payer was Medical Device Business Services, Inc. The 722 providers of this specialty with any payment received $15,814.30 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
- University Professional ServicesPortland, OR
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Zachary Mark Working among 12 orthopaedic trauma physician records in Oregon
Zachary Mark Working, MD is one of 12 orthopaedic trauma physician records with a practice address in Oregon. 92% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2012, is newer than 33% of them.
- NPI issued2012 · 33% of these records are older, 50% newer
- In a Medicare fileYes · 92% of these records are
- In the CMS Doctors and Clinicians fileYes · 83% of these records are
- Graduated2012 · median 2012 among the 10 with a school on file
- Record last updated2024 · 17% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207XX0801X and a Oregon practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Orthopaedic Trauma Physician providers in Oregon
There are 12 orthopaedic trauma physician records in Oregon.
All 12 in Oregon → Every provider in Portland → Orthopaedic Trauma Physician nationwide →
The 8 orthopaedic trauma physician records with the nearest ZIP codes
- Graham DekeyserPortland, OR 972391720440522
- Darin Friess, MDPortland, OR 972391215963368
- Samuel ScheinbergPortland, OR 972011972878296
- David Pressman, MDSalem, OR 973011891702551
- Anna Van Der Horst, M.D.Eugene, OR 974011073908646
- Brandon Wilkinson, M.D.Eugene, OR 974011639589765
- Stephen Wallace, MDLake Oswego, OR 970351396162673
- Kaitlyn Guadagno, DOMedford, OR 975041427630540
Common questions
What is Zachary Mark Working, MD's NPI number?
Zachary Mark Working, MD's National Provider Identifier (NPI) is 1790051084, issued on Mar 30, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Zachary Mark Working, MD located?
The NPPES record lists a practice address at 3181 SW Sam Jackson Park RD, Portland, OR, 97239. Phone: (503) 494-6400. Providers update this record themselves, so call before visiting.
How can I verify Zachary Mark Working, MD's license?
NPPES lists Oregon license number MD188610, as entered by the provider. Search the Oregon Medical Board at https://www.oregon.gov/OMB/Pages/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Zachary Mark Working, MD prescribe under Medicare Part D?
In 2024, Zachary Mark Working, MD had 17 Medicare Part D claims; the average among orthopaedic trauma physician prescribers was 151. Part D covers Medicare prescriptions only.
What is Zachary Mark Working, MD's MIPS final score?
The 2023 MIPS final score is 97.8 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.