Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. Nicholas Knoble Callahan, DO

Individual provider Orthopaedic Surgery Physician · NPI 1659783934

Dr. Nicholas Knoble Callahan, DO is an Orthopedic Surgery in Mayfield Heights, Ohio. Graduated from Lake Erie College of Osteopathic Medicine, Erie in 2014, 12 years ago. Practices with Cleveland Orthopedic and Spine Institute, LLC, a 16-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Ohio.

Years since qualifying
12
Trained at
Lake Erie College of Osteopathic Medicine, Erie
Licensed in
OH
In the registry since
2014
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

See every abbreviation used in this directory →

Practice location Address checks out

300 Allen Bradley Dr Ste 200
Mayfield Heights, OH 44124-6130
Phone: (844) 746-8537
Fax: (216) 313-9166
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 300 Allen Bradley Dr Ste 250, Mayfield Heights, OH 44124-6130 — (444) 966-7846

Specialties & licences

Orthopaedic Surgery Physician (primary) Taxonomy 207X00000X · Licence 34.014321 (OH)

Record details

NPI number1659783934
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedMay 21, 2014
Last updated in NPPESJuly 28, 2026
Certification dateJuly 28, 2026

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyORTHOPEDIC SURGERY
Medical schoolLAKE ERIE COLLEGE OF OSTEOPATHIC MEDICINE, ERIE
Graduated 2014 (12 years in practice)
Group practice Cleveland Orthopedic And Spine Institute, Llc — 16 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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