Ryan Mcnassor, MD
NPI 1255089942 · Orthopaedic Surgery Physician · Royal Oak, MI
Enrolled with Medicare as Order and Referring Only - Orthopedic Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ryan Mcnassor, MD is a Orthopaedic Surgery Physician provider in Royal Oak, MI (NPI 1255089942).
Provider details
- NPI number
- 1255089942
- Entity type
- Individual
- Primary specialty
- Orthopaedic Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 4351051021 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
4 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$891 across 13 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
Registry dates
- Enumerated
- 2022-03-12
- Last updated
- 2023-06-10
- Certified
- 2023-06-10
Frequently asked questions
- What is Ryan Mcnassor's NPI number?
- Ryan Mcnassor's National Provider Identifier (NPI) is 1255089942, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ryan Mcnassor's specialty?
- Ryan Mcnassor is listed in the NPPES registry with a primary specialty of Orthopaedic Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Ryan Mcnassor located?
- Ryan Mcnassor's practice location on file with NPPES is 3601 W 13 Mile Rd, Royal Oak, MI 48073-6712.
- What is Ryan Mcnassor's phone number?
- The practice phone number listed in the NPPES registry for Ryan Mcnassor is (248) 898-5000.
- Does Ryan Mcnassor accept Medicare?
- Ryan Mcnassor is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ryan Mcnassor's NPI active?
- Yes — Ryan Mcnassor's NPI (1255089942) is active in the NPPES registry as of the last update on 2023-06-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.