Ryan O'Neill, PA-C
NPI 1538411277 · Physician Assistant · Madison, WI
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ryan O'Neill, PA-C is a Physician Assistant provider in Madison, WI (NPI 1538411277).
Provider details
- NPI number
- 1538411277
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA-C
- Sex
- Male
- Sole proprietor
- No
- License
- 3052-23 (WI)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
13 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
45 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) |
|---|---|---|
| Replacement of Knee Joint, Both Sides of Knee27447 | 26 | $156 |
| Replacement of Thigh Bone and Hip Joint With Prosthesis27130 | 19 | $157 |
Typical Medicare-allowed amounts for these services range $156–$157 (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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Oxycodone Hcl | 167 | 136 |
| Ondansetronbrand: Ondansetron Odt | 121 | 117 |
| Celecoxib | 84 | 79 |
| Cefadroxil | 57 | 54 |
| Cephalexin | 49 | 46 |
| Tramadol Hcl | 23 | 15 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 21 | 20 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$142 across 1 record (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 (1)
- 123 Hospital Dr Ste 1008Watertown, WI 53098-3320Phone: (920) 206-6500Fax: (920) 261-4013
Registry dates
- Enumerated
- 2012-10-04
- Last updated
- 2025-10-07
- Certified
- 2025-10-07
Frequently asked questions
- What is Ryan O'Neill's NPI number?
- Ryan O'Neill's National Provider Identifier (NPI) is 1538411277, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ryan O'Neill's specialty?
- Ryan O'Neill is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Ryan O'Neill located?
- Ryan O'Neill's practice location on file with NPPES is 2501 W Beltline Hwy Ste 601, Madison, WI 53713-2309.
- What is Ryan O'Neill's phone number?
- The practice phone number listed in the NPPES registry for Ryan O'Neill is (608) 234-7436.
- Does Ryan O'Neill accept Medicare?
- Ryan O'Neill is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ryan O'Neill's NPI active?
- Yes — Ryan O'Neill's NPI (1538411277) is active in the NPPES registry as of the last update on 2025-10-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.