GARY ROSS SIRKEN DO
NPI 1164469334
Internal Medicine - Nephrology in Langhorne, PA
About Gary Ross Sirken Do NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
GARY ROSS SIRKEN DO (NPI 1164469334) is an individual nephrology provider in Langhorne, Pennsylvania, licensed in Pennsylvania (OS010180L) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS, is affiliated with Hospital Of Univ Of Pennsylvania, and is a graduate of Philadelphia College Of Osteopathic Medicine (1997).
NPPES Registry Identity
Specialties & Licenses 2
Other Identifiers 1
Accepted Insurance
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
Gary Ross Sirken Do 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 Gary Sirken reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Langhorne, PA 19047
- Reassigned Medicare billing, Pennsylvania enrollment
- 490 clinicians in this Medicare group
Philadelphia, PA 19124
- Reassigned Medicare billing, Pennsylvania enrollment
- Medicare enrollment name: Methodist Associates In Healthcare, Inc
- 600 clinicians in this Medicare group
Lower Gwynedd, PA 19002
- Reassigned Medicare billing, Pennsylvania enrollment
- 25 clinicians in this Medicare group
Philadelphia, PA 19107
- Reassigned Medicare billing, Pennsylvania enrollment
- 1,739 clinicians in this Medicare group
Upland, PA 19013
- Reassigned Medicare billing, Pennsylvania enrollment
- 44 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 14
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 3
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Hospital Of Univ Of Pennsylvania
Acute Care Hospitals · Philadelphia, PAThomas Jefferson University Hospital
Acute Care Hospitals · Philadelphia, PASt Mary Medical Center
Acute Care Hospitals · Langhorne, PAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 19047 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Referred Medical Equipment & Supplies CMS DME claims 2
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
Other Providers at the Same Location NPPES 2
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
LANGHORNE, PA 19047
LANGHORNE, PA 19047
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 Sirken's NPI number?
The NPI number for Gary Sirken is 1164469334. It was assigned to this individual provider in the NPPES registry on May 31, 2006.
Where is Gary Sirken located?
Gary Sirken practices at 825 Town Center Drive Suite 152, Langhorne, PA 19047. The listed phone number is (215) 741-3510.
What is Gary Sirken's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.
Is Gary Sirken enrolled in Medicare?
Yes. Gary Sirken 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 Gary Sirken's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Gary Sirken reassigns Medicare benefits to 5 organizations: Aria Health Physician Services (Langhorne, PA), Methodist Associates In Health Care, Inc (Philadelphia, PA), Abington Memorial Hospital (Lower Gwynedd, PA), Jefferson University Physicians (Philadelphia, PA) and Clinical Renal Associates, LLC (Upland, PA). 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 Gary Sirken's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Gary Sirken accept?
Health plans from Ambetter Health, Ambetter Health of Delaware and Ambetter from Buckeye Health Plan list Gary Sirken as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Gary Sirken affiliated with any hospitals?
According to CMS data, Gary Sirken is affiliated with Hospital Of Univ Of Pennsylvania, Thomas Jefferson University Hospital and St Mary Medical Center.
When was this NPI record last updated?
The NPPES record for Gary Sirken was last updated on December 13, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 22 months 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 Ross Sirken, DO · NPI 1164469334
Nephrology physician in Langhorne, Pennsylvania. Individual provider, active in the CMS NPPES registry since May 31, 2006.
## Identity
- **NPI:** 1164469334 (Entity type: Individual)
- **Enumerated:** May 31, 2006
- **Primary specialty:** Internal Medicine - Nephrology · taxonomy 207RN0300X
- **State license:** OS010180L (Pennsylvania)
- **Sole proprietor:** No
## Practice location
- **Address:** 825 TOWN CENTER DRIVE, SUITE 152, Langhorne, PA 19047-3030
- **Phone:** (215) 741-3510 · **Fax:** (215) 741-3519
## 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): Aria Health Physician Services (NPI 1386981827, Langhorne, PA); Methodist Associates In Health Care, Inc (NPI 1609417872, Philadelphia, PA); Abington Memorial Hospital (NPI 1508340134, Lower Gwynedd, PA); Jefferson University Physicians (NPI 1326093675, Philadelphia, PA); Clinical Renal Associates, LLC (NPI 1689620254, Upland, PA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Philadelphia College Of Osteopathic Medicine, class of 1997
## Record status
- **NPPES last updated:** December 13, 2024
- **Other identifiers:** Medicaid 0019054860003 (PA)
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Source: [NPI Profile](https://npiprofile.com/npi/1164469334) · Data from the CMS NPPES public registry.