JAY A GREENSTEIN MD
NPI 1982615696
General Practice in Bakersfield, CA
About Jay A Greenstein Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JAY A GREENSTEIN MD (NPI 1982615696) is an individual general practice provider in Bakersfield, California, licensed in California (A25998) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses 2
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)
Jay A Greenstein Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
6Medicare enrollment records show Jay Greenstein reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Bakersfield, CA 93311
- Reassigned Medicare billing, California enrollment
- 200 clinicians in this Medicare group
Bakersfield, CA 93308
- Reassigned Medicare billing, California enrollment
- 48 clinicians in this Medicare group
Bakersfield, CA 93308
- Reassigned Medicare billing, California enrollment
- 2,323 clinicians in this Medicare group
Delano, CA 93215
- Reassigned Medicare billing, California enrollment
- 301 clinicians in this Medicare group
San Francisco, CA 94111
- Reassigned Medicare billing, California enrollment
- 407 clinicians in this Medicare group
Santa Rosa, CA 95405
- Reassigned Medicare billing, California enrollment
- 42 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
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
BAKERSFIELD, CA 93311
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 Jay Greenstein's NPI number?
The NPI number for Jay Greenstein is 1982615696. It was assigned to this individual provider in the NPPES registry on August 10, 2006.
Where is Jay Greenstein located?
Jay Greenstein practices at 11309 Covent Gardens Dr, Bakersfield, CA 93311. The listed phone number is (661) 330-9294.
What is Jay Greenstein's specialty?
The primary specialty registered for this NPI is General Practice with taxonomy code 208D00000X.
Is Jay Greenstein enrolled in Medicare?
Yes. Jay Greenstein is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Jay Greenstein's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Jay Greenstein reassigns Medicare benefits to 6 organizations: Pinnacle Emergency Physicians Of Bakersfield, A Professional Corp (Bakersfield, CA), Sunshine Physician Services, PC (Bakersfield, CA), Cep America-California (Bakersfield, CA), Team Physicians Of California Medical Group Inc (Delano, CA), Signify Health Medical Associates Of California, PC (San Francisco, CA) and 1 more organization, listed in the Medicare section above. 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 Jay Greenstein'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 Jay Greenstein was last updated on February 27, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# Jay A Greenstein, MD · NPI 1982615696
General Practice physician in Bakersfield, California. Individual provider, active in the CMS NPPES registry since August 10, 2006.
## Identity
- **NPI:** 1982615696 (Entity type: Individual)
- **Enumerated:** August 10, 2006
- **Primary specialty:** General Practice · taxonomy 208D00000X
- **State license:** A25998 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 11309 COVENT GARDENS DR, Bakersfield, CA 93311-9239
- **Phone:** (661) 330-9294 · **Fax:** (661) 665-8923
## 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:** 6 organizations under Medicare reassignment (form CMS-855R): Pinnacle Emergency Physicians Of Bakersfield, A Professional Corp (NPI 1639415862, Bakersfield, CA); Sunshine Physician Services, PC (NPI 1649725466, Bakersfield, CA); Cep America-California (NPI 1134998867, Bakersfield, CA); Team Physicians Of California Medical Group Inc (NPI 1447288345, Delano, CA); Signify Health Medical Associates Of California, PC (NPI 1124685169, San Francisco, CA); and 1 more · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** February 27, 2024
- **Other identifiers:** Medicaid 00A259980 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1982615696) · Data from the CMS NPPES public registry.