Isaac Boyack, M.D.
NPI 1942663414 · Diagnostic Radiology Physician · Marshfield, WI
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Isaac Boyack, M.D. is a Diagnostic Radiology Physician provider in Marshfield, WI (NPI 1942663414).
Provider details
- NPI number
- 1942663414
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 301190 (NY)
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 tenure28% of score
10 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
2,376 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Ct Scan Head Or Brain Without Contrast70450 | 494 | $37 |
| X-Ray of Lower and Sacral Spine, 2-3 Views72100 | 229 | $10 |
| Mri Scan of Lower Spinal Canal Without Contrast72148 | 179 | $65 |
| Ct Scan of Upper Spine Without Contrast72125 | 176 | $44 |
| Mri Scan of Brain Before and After Contrast70553 | 150 | $101 |
| Mri Scan of Brain Without Contrast70551 | 126 | $65 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2016-04-01
- Last updated
- 2023-01-26
- Certified
- 2023-01-26
Frequently asked questions
- What is Isaac Boyack's NPI number?
- Isaac Boyack's National Provider Identifier (NPI) is 1942663414, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Isaac Boyack's specialty?
- Isaac Boyack is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Isaac Boyack located?
- Isaac Boyack's practice location on file with NPPES is 1000 N Oak Ave, Marshfield, WI 54449-5703.
- What is Isaac Boyack's phone number?
- The practice phone number listed in the NPPES registry for Isaac Boyack is (715) 387-5511.
- Does Isaac Boyack accept Medicare?
- Isaac Boyack is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Isaac Boyack's NPI active?
- Yes — Isaac Boyack's NPI (1942663414) is active in the NPPES registry as of the last update on 2023-01-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.