Zachary Working, MD
NPI 1790051084 · Orthopaedic Trauma Physician · Portland, OR
Enrolled with Medicare as Practitioner - Orthopedic Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Zachary Working, MD is a Orthopaedic Trauma Physician provider in Portland, OR (NPI 1790051084).
Provider details
- NPI number
- 1790051084
- Entity type
- Individual
- Primary specialty
- Orthopaedic Trauma PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- A148264 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
14 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
68 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 38 | $67 |
| Therapy Procedure Using a Special Bandage, Vacuum Pump and Disposable Medical Equipment, Surface Area 50.0 Sq Cm Or Less97607 | 18 | $22 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 12 | $178 |
Typical Medicare-allowed amounts for these services range $22–$178 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,399 across 6 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (2)
- 400 Parnassus AveSan Francisco, CA 94143-2202Phone: (415) 476-1000
- 50 N Medical DrSalt Lake City, UT 84132-0001Phone: (801) 581-2121
Registry dates
- Enumerated
- 2012-03-30
- Last updated
- 2024-08-21
- Certified
- 2024-08-21
Frequently asked questions
- What is Zachary Working's NPI number?
- Zachary Working's National Provider Identifier (NPI) is 1790051084, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Zachary Working's specialty?
- Zachary Working is listed in the NPPES registry with a primary specialty of Orthopaedic Trauma Physician (Allopathic & Osteopathic Physicians).
- Where is Zachary Working located?
- Zachary Working's practice location on file with NPPES is 3181 Sw Sam Jackson Park Rd, Portland, OR 97239-3011.
- What is Zachary Working's phone number?
- The practice phone number listed in the NPPES registry for Zachary Working is (503) 494-6400.
- Does Zachary Working accept Medicare?
- Zachary Working is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Zachary Working's NPI active?
- Yes — Zachary Working's NPI (1790051084) is active in the NPPES registry as of the last update on 2024-08-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.