GARY GRUEN
NPI 1952374860
Specialist in Pittsburgh, PA
About Gary Gruen NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
GARY GRUEN (NPI 1952374860) is an individual specialist in Pittsburgh, Pennsylvania, licensed in Pennsylvania (MD032636E) and active in the NPI registry since February 2006. He is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Gary Gruen is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Gary Gruen reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Pittsburgh, PA 15213
- Reassigned Medicare billing, Pennsylvania enrollment
- 7,114 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 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
PITTSBURGH, PA 15213
PITTSBURGH, PA 15213
PITTSBURGH, PA 15213
PITTSBURGH, PA 15213
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 Gary Gruen's NPI number?
The NPI number for Gary Gruen is 1952374860. It was assigned to this individual provider in the NPPES registry on February 10, 2006.
Where is Gary Gruen located?
Gary Gruen practices at 3471 5th Ave Suite 1010, Pittsburgh, PA 15213. The listed phone number is (412) 687-3900.
What is Gary Gruen's specialty?
The primary specialty registered for this NPI is Specialist with taxonomy code 174400000X.
Is Gary Gruen enrolled in Medicare?
Yes. Gary Gruen is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Gary Gruen's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Gary Gruen reassigns Medicare benefits to University Of Pittsburgh Physicians (Pittsburgh, PA). The 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 Gary Gruen'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 Gary Gruen was last updated on April 6, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.
# Gary Gruen · NPI 1952374860
Specialist provider in Pittsburgh, Pennsylvania. Individual provider, active in the CMS NPPES registry since February 10, 2006.
## Identity
- **NPI:** 1952374860 (Entity type: Individual)
- **Enumerated:** February 10, 2006
- **Primary specialty:** Specialist · taxonomy 174400000X
- **State license:** MD032636E (Pennsylvania)
- **Sole proprietor:** No
## Practice location
- **Address:** 3471 5TH AVE, SUITE 1010, Pittsburgh, PA 15213-3215
- **Phone:** (412) 687-3900
## 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:** University Of Pittsburgh Physicians (NPI 1548433527, Pittsburgh, PA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** April 6, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1952374860) · Data from the CMS NPPES public registry.