John J Callahan, MD - Medicare Orthopedic Surgery in Amherst, NY

John J Callahan, MD is a medicare enrolled "Orthopaedic Surgery - Hand Surgery" physician in Amherst, New York. He went to State University Of Ny Upstate Medical University and graduated in 1987 and has 37 years of diverse experience with area of expertise as Orthopedic Surgery. He is a member of the group practice Excelsior Orthopaedics Llp and his current practice location is 3925 Sheridan Drive, Suite 100, Amherst, New York. You can reach out to his office (for appointments etc.) via phone at (716) 250-9999.

John J Callahan is licensed to practice in New York (license number 192324) and he also participates in the medicare program. He accepts medicare assignments (which means he accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and his NPI Number is 1952338048.

Contact Information

John J Callahan, MD
3925 Sheridan Drive, Suite 100,
Amherst, NY 14226-0000
(716) 250-9999
(716) 250-4177



Physician's Profile

Full NameJohn J Callahan
GenderMale
SpecialityOrthopedic Surgery
Experience37 Years
Location3925 Sheridan Drive, Amherst, New York
Accepts Medicare AssignmentsYes. He accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • John J Callahan attended and graduated from State University Of Ny Upstate Medical University in 1987
  NPI Data:
  • NPI Number: 1952338048
  • Provider Enumeration Date: 06/26/2006
  • Last Update Date: 12/31/2009
  Medicare PECOS Information:
  • PECOS PAC ID: 4284661414
  • Enrollment ID: I20050720000155

Medical Identifiers

Medical identifiers for John J Callahan such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1952338048NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207XS0106XOrthopaedic Surgery - Hand Surgery 192324 (New York)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Erie County Medical CenterBuffalo, NYHospital
Mercy Hospital Of BuffaloBuffalo, NYHospital
Kenmore Mercy HospitalKenmore, NYHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Excelsior Orthopaedics Llp2062491517131

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Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. John J Callahan allows following entities to bill medicare on his behalf.
Entity NameExcelsior Orthopaedics Llp
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1831196757
PECOS PAC ID: 2062491517
Enrollment ID: O20040717000183

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Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. John J Callahan is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
John J Callahan, MD
3925 Sheridan Drive, Suite 100,
Amherst, NY 14226-0000

Ph: (716) 250-9999
John J Callahan, MD
3925 Sheridan Drive, Suite 100,
Amherst, NY 14226-0000

Ph: (716) 250-9999

News Archive

Protein markers in chronic lymphocytic leukemia may help determine patients' prognoses

Chronic lymphocytic leukemia (CLL) is the most common leukemia in the Western world. New research published in the Journal of Leukocyte Biology reveals that certain protein markers may indicate which patients have stable forms of CLL and which have more aggressive types.

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Orthopaedic Surgery Doctors in Amherst, NY

Jeremy Paul Doak, M.D.
Orthopedic Surgery
Medicare: Accepting Medicare Assignments
Practice Location: 4949 Harlem Rd, Amherst, NY 14226
Phone: 716-204-3251    Fax: 716-204-3269
Dr. Daniel Vincent Vargo, M.D.
Orthopedic Surgery
Medicare: Accepting Medicare Assignments
Practice Location: 3925 Sheridan Dr, Amherst, NY 14226
Phone: 716-250-9999    
Michael Ferrick, MD
Orthopedic Surgery
Medicare: Medicare Enrolled
Practice Location: 4949 Harlem Rd, Amherst, NY 14226
Phone: 716-204-3251    Fax: 716-204-3269
Marc S Fineberg, MD
Orthopedic Surgery
Medicare: Accepting Medicare Assignments
Practice Location: 4949 Harlem Rd, 2nd Floor, Amherst, NY 14226
Phone: 716-204-3257    
Lisa A Daye, MD
Orthopedic Surgery
Medicare: Accepting Medicare Assignments
Practice Location: 3925 Sheridan Drive, Suite 100, Amherst, NY 14226
Phone: 716-250-9999    Fax: 716-250-4177
Nicholas Jon-paul Violante, DO
Orthopedic Surgery
Medicare: Accepting Medicare Assignments
Practice Location: 3925 Sheridan Dr, Amherst, NY 14226
Phone: 716-250-9999    
Dr. Kory Benjamin Reed, M.D.
Orthopedic Surgery
Medicare: Accepting Medicare Assignments
Practice Location: 3925 Sheridan Dr, Amherst, NY 14226
Phone: 716-250-9999    

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