SHIRISH A MAHAJAN MD
NPI 1609808856
Internal Medicine - Hematology & Oncology in Redding, CA
About Shirish A Mahajan Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
SHIRISH A MAHAJAN MD (NPI 1609808856) is an individual hematology & oncology provider in Redding, California, licensed in New York (001999) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS, is affiliated with Gerald Champion Regional Medical Center, and is a graduate of Other (1993).
NPPES Registry Identity
Specialties & Licenses 2
Other Identifiers 8
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Shirish A Mahajan Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
4Medicare enrollment records show Shirish Mahajan reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Eureka, CA 95501
- Reassigned Medicare billing, California enrollment
- 1,699 clinicians in this Medicare group
Crescent City, CA 95531
- Reassigned Medicare billing, California enrollment
- 36 clinicians in this Medicare group
Carmichael, CA 95608
- Reassigned Medicare billing, California enrollment
- 38 clinicians in this Medicare group
Alamogordo, NM 88310
- Reassigned Medicare billing, New Mexico enrollment
- 417 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.
Hospital Affiliations CMS Care Compare 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Gerald Champion Regional Medical Center
Acute Care Hospitals · Alamogordo, NMCurry General Hospital
Critical Access Hospitals · Gold Beach, ORPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 96002 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 12
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Shirish Mahajan's NPI number?
The NPI number for Shirish Mahajan is 1609808856. It was assigned to this individual provider in the NPPES registry on July 7, 2006.
Where is Shirish Mahajan located?
Shirish Mahajan practices at 310 Hartnell Ave, Redding, CA 96002. The listed phone number is (530) 244-2223.
What is Shirish Mahajan's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.
Is Shirish Mahajan enrolled in Medicare?
Yes. Shirish Mahajan is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Shirish Mahajan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Shirish Mahajan reassigns Medicare benefits to 4 organizations: Providence Medical Foundation (Eureka, CA), Sutter Coast Hospital (Crescent City, CA), Sierra Hematology And Oncology Medical Centers (Carmichael, CA) and Otero County Hospital Association (Alamogordo, NM). 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 Shirish Mahajan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Shirish Mahajan affiliated with any hospitals?
According to CMS data, Shirish Mahajan is affiliated with Gerald Champion Regional Medical Center and Curry General Hospital.
When was this NPI record last updated?
The NPPES record for Shirish Mahajan was last updated on November 14, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 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.
# Shirish A Mahajan, MD · NPI 1609808856
Hematology & Oncology physician in Redding, California. Individual provider, active in the CMS NPPES registry since July 7, 2006.
## Identity
- **NPI:** 1609808856 (Entity type: Individual)
- **Enumerated:** July 7, 2006
- **Primary specialty:** Internal Medicine - Hematology & Oncology · taxonomy 207RH0003X
- **State license:** 001999 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** 310 HARTNELL AVE, Redding, CA 96002-1800
- **Phone:** (530) 244-2223 · **Fax:** (530) 244-4799
## 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:** 4 organizations under Medicare reassignment (form CMS-855R): Providence Medical Foundation (NPI 1477790517, Eureka, CA); Sutter Coast Hospital (NPI 1457367062, Crescent City, CA); Sierra Hematology And Oncology Medical Centers (NPI 1992796759, Carmichael, CA); Otero County Hospital Association (NPI 1861450579, Alamogordo, NM) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1993
## Record status
- **NPPES last updated:** November 14, 2008
- **Other identifiers:** Medicare PIN DD7057 (NY); Medicare PIN AT274 (CA); Medicaid GR0054240 (CA); and 5 more
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Source: [NPI Profile](https://npiprofile.com/npi/1609808856) · Data from the CMS NPPES public registry.