Nicholas Callahan, DO
NPI 1659783934 · Orthopaedic Surgery Physician · Mayfield Heights, OH
Enrolled with Medicare as Practitioner - Orthopedic Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nicholas Callahan, DO is a Orthopaedic Surgery Physician provider in Mayfield Heights, OH (NPI 1659783934).
Provider details
- NPI number
- 1659783934
- Entity type
- Individual
- Primary specialty
- Orthopaedic Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- 34.014321 (OH)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
12 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
856 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 | 204 | $88 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 96 | $125 |
| Aspiration And/Or Injection of Fluid From Large Joint20610 | 82 | $69 |
| Therapy Procedure Using Exercise to Develop Strength, Endurance, Range of Motion, and Flexibility, Each 15 Minutes97110 | 60 | $27 |
| Aspiration And/Or Injection of Fluid Large Joint Using Ultrasound Guidance20611 | 59 | $99 |
| X-Ray of Hip, 2-3 Views |
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 |
|---|---|---|
| Ondansetronbrand: Ondansetron Odt | 60 | 50 |
| Oxycodone Hcl | 49 | 45 |
| Meloxicam | 47 | 37 |
| Cefadroxil | 38 | 36 |
| Pantoprazole Sodium | 25 | 23 |
| Cephalexin | 12 | 12 |
| Methylprednisolone | 11 | 11 |
| Amoxicillin |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$194 across 4 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
- 2014-05-21
- Last updated
- 2025-09-16
- Certified
- 2025-09-16
Frequently asked questions
- What is Nicholas Callahan's NPI number?
- Nicholas Callahan's National Provider Identifier (NPI) is 1659783934, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nicholas Callahan's specialty?
- Nicholas Callahan is listed in the NPPES registry with a primary specialty of Orthopaedic Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Nicholas Callahan located?
- Nicholas Callahan's practice location on file with NPPES is 300 Allen Bradley Dr Ste 200, Mayfield Heights, OH 44124-6130.
- What is Nicholas Callahan's phone number?
- The practice phone number listed in the NPPES registry for Nicholas Callahan is (844) 746-8537.
- Does Nicholas Callahan accept Medicare?
- Nicholas Callahan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nicholas Callahan's NPI active?
- Yes — Nicholas Callahan's NPI (1659783934) is active in the NPPES registry as of the last update on 2025-09-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.