DR. JOHN MARION GARRISON M.D.
NPI 1932189222
Anesthesiology in Shelton, CT
About Dr. John Marion Garrison M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JOHN MARION GARRISON M.D. (NPI 1932189222) is an individual anesthesiology provider in Shelton, Connecticut, licensed in Connecticut (033002) and active in the NPI registry since January 2006. He is enrolled in Medicare PECOS and maintains a secondary practice location in Hartford.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 1
Other Identifiers 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dr. John Marion Garrison M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show John Garrison reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Shelton, CT 06484
- Reassigned Medicare billing, Connecticut enrollment
- 727 clinicians in this Medicare group
Hartford, CT 06106
- Reassigned Medicare billing, Connecticut enrollment
- 601 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.
Other Providers at the Same Location NPPES 10
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SHELTON, CT 06484
SHELTON, CT 06484
SHELTON, CT 06484
SHELTON, CT 06484
SHELTON, CT 06484
SHELTON, CT 06484
SHELTON, CT 06484
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 Garrison's NPI number?
The NPI number for John Garrison is 1932189222. It was assigned to this individual provider in the NPPES registry on January 20, 2006.
Where is John Garrison located?
John Garrison practices at 2 Trap Falls Road Suite 414, Shelton, CT 06484. The listed phone number is (203) 929-7353.
What is John Garrison's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is John Garrison enrolled in Medicare?
Yes. John Garrison is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for John Garrison's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Garrison reassigns Medicare benefits to 2 organizations: Integrated Anesthesia Associates LLC (Shelton, CT) and Connecticut Children's Specialty Group, Inc. (Hartford, CT). 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 Garrison's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for John Garrison was last updated on August 23, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.
# Dr. John Marion Garrison, M.D. · NPI 1932189222
Anesthesiology physician in Shelton, Connecticut. Individual provider, active in the CMS NPPES registry since January 20, 2006.
## Identity
- **NPI:** 1932189222 (Entity type: Individual)
- **Enumerated:** January 20, 2006
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** 033002 (Connecticut)
- **Sole proprietor:** No
## Practice location
- **Address:** 2 TRAP FALLS ROAD, SUITE 414, Shelton, CT 06484-7353
- **Phone:** (203) 929-7353 · **Fax:** (203) 929-0756
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Integrated Anesthesia Associates LLC (NPI 1881636397, Shelton, CT); Connecticut Children's Specialty Group, Inc. (NPI 1669448882, Hartford, CT) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** August 23, 2023
- **Other identifiers:** Medicaid 001330026 (CT)
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Source: [NPI Profile](https://npiprofile.com/npi/1932189222) · Data from the CMS NPPES public registry.