KEITH L. CALLAHAN M.D., P.C.
NPI 1558556266
Clinic/Center - Primary Care in Warwick, RI
About Keith L. Callahan M.d., P.c. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
KEITH L. CALLAHAN M.D., P.C. (NPI 1558556266) is a healthcare organization registered as a primary care in Warwick, Rhode Island and active in the NPI registry since September 2007. The organization holds a CLIA Waiver certificate valid through October 8, 2027 and lists Michael C Oakes, Office Manager, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Keith L. Callahan M.d., P.c. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
5Medicare enrollment records show 5 clinicians reassign Medicare billing to Keith L. Callahan M.D., P.C., which bills Medicare for the services they deliver. Of these, 2 practice at this address and 4 within 10 miles. They are listed nearest first.
Clinicians, nearest first (5)
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
CLIA Laboratory Certificates CMS CLIA
Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.
Certificate of Waiver 41D1074873
Keith L Callahan MD PC · Warwick, RIFrequently 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 Keith L. Callahan M.D., P.C.'s NPI number?
The NPI number for Keith L. Callahan M.D., P.C. is 1558556266. It was assigned to this organization in the NPPES registry on September 6, 2007.
Where is Keith L. Callahan M.D., P.C. located?
Keith L. Callahan M.D., P.C. is located at 390 Toll Gate Rd Ste 108, Warwick, RI 02886. The listed phone number is (401) 921-5672.
What is Keith L. Callahan M.D., P.C.'s specialty?
The primary specialty registered for this NPI is Clinic/Center, specializing in Primary Care, with taxonomy code 261QP2300X.
Is Keith L. Callahan M.D., P.C. enrolled in Medicare?
Yes. Keith L. Callahan M.D., P.C. is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Keith L. Callahan M.D., P.C.?
According to the CMS Revalidation Reassignment List (October 2026 release), 5 clinicians in 2 Medicare specialties reassign their Medicare billing to Keith L. Callahan M.D., P.C.. A 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 the clinician's services. The largest specialties are Nurse Practitioner (3) and Family Practice (2). Of these, 2 practice at this address and 4 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Does Keith L. Callahan M.D., P.C. hold a CLIA laboratory certificate?
Yes. A Certificate of Waiver (number 41D1074873) is associated with this NPI, valid through October 8, 2027. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.
When was this NPI record last updated?
The NPPES record for Keith L. Callahan M.D., P.C. was last updated on November 5, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 days 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.
# Keith L. Callahan M.d., P.c. · NPI 1558556266
Primary Care organization in Warwick, Rhode Island. Organization record, active in the CMS NPPES registry since September 6, 2007.
## Identity
- **NPI:** 1558556266 (Entity type: Organization)
- **Enumerated:** September 6, 2007
- **Primary specialty:** Clinic/Center - Primary Care · taxonomy 261QP2300X
- **Organization subpart:** No
- **Authorized official:** Michael Oakes, OFFICE MANAGER
## Practice location
- **Address:** 390 TOLL GATE RD STE 108, Warwick, RI 02886-4326
- **Phone:** (401) 921-5672 · **Fax:** (401) 921-5679
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 5 clinicians in 2 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Nurse Practitioner (3), Family Practice (2); 2 practice at this address and 4 within 10 miles · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** November 5, 2026
- **CLIA laboratory certificates:** 1 on file
---
Source: [NPI Profile](https://npiprofile.com/npi/1558556266) · Data from the CMS NPPES public registry.