GREG A GREENBERG MD
NPI 1013927441
Hospitalist in Redding, CA
About Greg A Greenberg Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
GREG A GREENBERG MD (NPI 1013927441) is an individual hospitalist provider in Redding, California, licensed in California (A86727) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS and is a graduate of Ohio State University College Of Medicine (2001).
NPPES Registry Identity
Specialties & Licenses 5
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 and accepts Medicare assignment
Greg A Greenberg Md 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
9Medicare enrollment records show Greg Greenberg reassigns Medicare billing to 9 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Redding, CA 96001
- Reassigned Medicare billing, California enrollment
- 2,323 clinicians in this Medicare group
Redding, CA 96001
- Reassigned Medicare billing, California enrollment
- 182 clinicians in this Medicare group
Mount Shasta, CA 96067
- Reassigned Medicare billing, California enrollment
- 61 clinicians in this Medicare group
Mount Shasta, CA 96067
- Reassigned Medicare billing, California enrollment
- 20 clinicians in this Medicare group
Yreka, CA 96097
- Reassigned Medicare billing, California enrollment
- 140 clinicians in this Medicare group
Arcata, CA 95521
- Reassigned Medicare billing, California enrollment
- 43 clinicians in this Medicare group
Vancouver, WA 98661
- Reassigned Medicare billing, Texas enrollment
- 44 clinicians in this Medicare group
Tacoma, WA 98421
- Reassigned Medicare billing, Texas enrollment
- 17 clinicians in this Medicare group
El Cajon, CA 92021
- Reassigned Medicare billing, Texas enrollment
- 18 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 96001 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Reported Quality Measures
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.
REDDING, CA 96001
REDDING, CA 96001
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 Greg Greenberg's NPI number?
The NPI number for Greg Greenberg is 1013927441. It was assigned to this individual provider in the NPPES registry on August 8, 2006.
Where is Greg Greenberg located?
Greg Greenberg practices at 1100 Butte St, Redding, CA 96001. The listed phone number is (530) 227-6361.
What is Greg Greenberg's specialty?
The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.
Is Greg Greenberg enrolled in Medicare?
Yes. Greg Greenberg 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 Greg Greenberg's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Greg Greenberg reassigns Medicare benefits to 9 organizations: Cep America - California (Redding, CA), Vituity Hospitalists PC (Redding, CA), Mount Eddy Emergency Physicians Medical Group, Inc. (Mount Shasta, CA), North State Hospitalist Medical Group, Inc (Mount Shasta, CA), Siskiyou Hospital, Inc. (Yreka, CA) and 4 more organizations, 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 Greg Greenberg'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 Greg Greenberg was last updated on May 28, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.
# Greg A Greenberg, MD · NPI 1013927441
Hospitalist physician in Redding, California. Individual provider, active in the CMS NPPES registry since August 8, 2006.
## Identity
- **NPI:** 1013927441 (Entity type: Individual)
- **Enumerated:** August 8, 2006
- **Primary specialty:** Hospitalist · taxonomy 208M00000X
- **State license:** A86727 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 1100 BUTTE ST, Redding, CA 96001-0852
- **Phone:** (530) 227-6361 · **Fax:** (530) 229-3703
## 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:** 9 organizations under Medicare reassignment (form CMS-855R): Cep America - California (NPI 1376604686, Redding, CA); Vituity Hospitalists PC (NPI 1730666108, Redding, CA); Mount Eddy Emergency Physicians Medical Group, Inc. (NPI 1316299787, Mount Shasta, CA); North State Hospitalist Medical Group, Inc (NPI 1598305682, Mount Shasta, CA); Siskiyou Hospital, Inc. (NPI 1093892275, Yreka, CA); and 4 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Ohio State University College Of Medicine, class of 2001
## Record status
- **NPPES last updated:** May 28, 2019
- **Other identifiers:** Medicaid 00A867270 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1013927441) · Data from the CMS NPPES public registry.