Shirish A. Mahajan, MD
Hematology & Oncology Physician · Redding, CA
Shirish A. Mahajan, MD is a hematology & oncology physician with a practice address in Redding, California, and NPI 1609808856, issued on Jul 7, 2006. Check the license (California A105218, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Shirish A. Mahajan
- Credential
- MD
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License numbers
- A105218 CA
001999 NY
Self-reported in NPPES; status is on the state search - Practice location
- 310 Hartnell Ave, Redding, CA 96002
- Phone
- (530) 244-2223
- Enumerated
- Jul 7, 2006
- Record last updated
- Nov 14, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (530) 244-4799
- Medicaid IDs
- GR0054240 CA
1629237011 CA - Medicare enrollment
- Enrolled (PECOS I20081111000412); may accept Medicare assignment
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 1,583 in California → Look up another NPI →
Also registered at 310 Hartnell Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Joanne Arnold, ANP, RNAdult Health Nurse Practitioner1487957338
- Carolyn Collins, MDMedical Oncology Physician1356380554
- Michael Figueroa, M.DMedical Oncology Physician1558316042
- Christopher Hancock, FNPFamily Nurse Practitioner1104109750
- Judith NeilioFamily Nurse Practitioner1518065770
- Brandon Penn, D.O.Internal Medicine Physician1295919504
Verify Shirish A. Mahajan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A105218Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
92% fewer Medicare Part D claims than the average hematology & oncology physician in 2024
69 Medicare Part D claims for 28 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D.
Most prescribed
- Anastrozole19 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $21.28
1 payment: food and beverage; the largest payer was Gilead Sciences, Inc. The 8,560 providers of this specialty with any payment received $7,481.41 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
2 hospitals and group practices
- Sutter Coast HospitalCrescent City, CA · Acute Care Hospitals2 of 5 stars
- Providence Medical FoundationEureka, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Shirish A. Mahajan among 1,583 hematology & oncology physician records in California
Shirish A. Mahajan, MD is one of 1,583 hematology & oncology physician records with a practice address in California. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 8% of them.
- NPI issued2006 · 8% of these records are older, 54% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated1993 · median 2003 among the 1,124 with a school on file
- Record last updated2008 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0003X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology & Oncology Physician providers in California
There are 1,583 hematology & oncology physician records in California.
All 1,583 in California → Every provider in Redding → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Dyanesh Bapu Ravindran, M.DRedding, CA 960021659387132
- Promila Dhanuka, M.D.Redding, CA 960011225094469
- Jed Freeman, M.D.Redding, CA 960011275669038
- Vijay Rao, MDRedding, CA 960011982725180
- Madhu Jodhani, M.D.Yuba City, CA 959911568419588
- Ted Heckman, MDParadise, CA 959691730143116
- Sudeep Ghuman, MDOroville, CA 959661376795468
- Martin Majer, M.D.Oroville, CA 959661376749234
Common questions
What is Shirish A. Mahajan, MD's NPI number?
Shirish A. Mahajan, MD's National Provider Identifier (NPI) is 1609808856, issued on Jul 7, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Shirish A. Mahajan, MD located?
The NPPES record lists a practice address at 310 Hartnell Ave, Redding, CA, 96002. Phone: (530) 244-2223. Providers update this record themselves, so call before visiting.
How can I verify Shirish A. Mahajan, MD's license?
NPPES lists California license number A105218, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Shirish A. Mahajan, MD prescribe under Medicare Part D?
In 2024, Shirish A. Mahajan, MD had 69 Medicare Part D claims for 28 beneficiaries; the average among hematology & oncology physician prescribers was 877. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.