MR. JOHN M CALLAHAN MD
NPI 1568454528
Hospitalist in Syracuse, NY
About Mr. John M Callahan Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MR. JOHN M CALLAHAN MD (NPI 1568454528) is an individual hospitalist provider in Syracuse, New York, licensed in New York (208546) and active in the NPI registry since August 2005. He is enrolled in Medicare PECOS, is affiliated with Crouse Hospital, and is a graduate of State University Of Ny Upstate Medical University (1986).
NPPES Registry Identity
Specialties & Licenses 2
Other Identifiers 4
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Mr. John M Callahan Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
5Medicare enrollment records show John Callahan reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Syracuse, NY 13210
- Reassigned Medicare billing, New York enrollment
- 189 clinicians in this Medicare group
Liverpool, NY 13088
- Reassigned Medicare billing, New York enrollment
- 625 clinicians in this Medicare group
Troy, NY 12180
- Reassigned Medicare billing, New York enrollment
- Medicare enrollment name: St Joseph's Physician Health PC
- 304 clinicians in this Medicare group
Buffalo, NY 14202
- Reassigned Medicare billing, New York enrollment
- 129 clinicians in this Medicare group
Buffalo, NY 14202
- Reassigned Medicare billing, New York enrollment
- 127 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 2
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Crouse Hospital
Acute Care Hospitals · Syracuse, NYPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 13203 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SYRACUSE, NY 13203
SYRACUSE, NY 13203
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is John Callahan's NPI number?
The NPI number for John Callahan is 1568454528. It was assigned to this individual provider in the NPPES registry on August 16, 2005.
Where is John Callahan located?
John Callahan practices at 301 Prospect Ave Hospital Internists, Syracuse, NY 13203. The listed phone number is (315) 448-5704.
What is John Callahan's specialty?
The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.
Is John Callahan enrolled in Medicare?
Yes. John Callahan is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for John Callahan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Callahan reassigns Medicare benefits to 5 organizations: Crouse Health Hospital Inc (Syracuse, NY), St Josephs Medical PC (Liverpool, NY), St. Joseph's Physician Health, P.C. (Troy, NY), Mobile Physician Services PLLC (Buffalo, NY) and Physician Mobile Medical Care PC (Buffalo, NY). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for John Callahan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is John Callahan affiliated with any hospitals?
According to CMS data, John Callahan is affiliated with Crouse Hospital.
When was this NPI record last updated?
The NPPES record for John Callahan was last updated on April 8, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Mr. John M Callahan, MD · NPI 1568454528
Hospitalist physician in Syracuse, New York. Individual provider, active in the CMS NPPES registry since August 16, 2005.
## Identity
- **NPI:** 1568454528 (Entity type: Individual)
- **Enumerated:** August 16, 2005
- **Primary specialty:** Hospitalist · taxonomy 208M00000X
- **State license:** 208546 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** 301 PROSPECT AVE, HOSPITAL INTERNISTS, Syracuse, NY 13203-1807
- **Phone:** (315) 448-5704 · **Fax:** (315) 423-6853
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 5 organizations under Medicare reassignment (form CMS-855R): Crouse Health Hospital Inc (NPI 1841340205, Syracuse, NY); St Josephs Medical PC (NPI 1942501747, Liverpool, NY); St. Joseph's Physician Health, P.C. (NPI 1154376770, Troy, NY); Mobile Physician Services PLLC (NPI 1194132415, Buffalo, NY); Physician Mobile Medical Care PC (NPI 1518765502, Buffalo, NY) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** State University Of Ny Upstate Medical University, class of 1986
## Record status
- **NPPES last updated:** April 8, 2013
- **Other identifiers:** Other P00927986 (NY); Medicare PIN BA0993 (NY); Medicare PIN J400016934; and 1 more
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Source: [NPI Profile](https://npiprofile.com/npi/1568454528) · Data from the CMS NPPES public registry.