Dr. Shirish A. Mahajan, MD
- Medicare services, 2021
- 27,515
- Part D claims, 2024
- 69
- Publications
- 2
- Hospital affiliations
- 5
- Industry payments
- $15,546
- Practice address
- 12998 Hesperia Rd, Victorville, CA 92395
- Practice phone
- Call (818) 507-4732
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Oncology Physicians Network of California
Victorville, California
Find Dr. Mahajan's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Shirish A. Mahajan is a hematologist and oncologist in Victorville, California
Dr. Mahajan practices at Oncology Physicians Network of California in Victorville, California.
Dr. Mahajan's NPI, 1609808856, was assigned on July 7, 2006. Dr. Mahajan graduated from Jawaharlal Institute of Postgraduate Medical Education and Research in 1994. Dr. Mahajan's New York license number on file is 001999.
- NPI
- 1609808856NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4183783715
- NPI enumeration date
- July 7, 2006
- NPI status
- Active
- Practice phone
- (818) 507-4732
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 59
- Medical school graduation
- 1994
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Shirish A. Mahajan practices at Oncology Physicians Network of California in Victorville, California
Dr. Mahajan's primary practice is Oncology Physicians Network of California, at 12998 Hesperia Rd, Victorville, CA 92395 in San Bernardino County. The practice phone is (818) 507-4732.
- Oncology Physicians Network of California12998 Hesperia Rd, Victorville, CA 92395 · San Bernardino CountyPhone(818) 507-4732
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Shirish A. Mahajan is affiliated with 7 sites of care and 4 medical groups
Dr. Mahajan's primary practice is Oncology Physicians Network of California in Victorville, California. Dr. Mahajan is also affiliated with CHRISTUS Health. The medical group on file is St. Jude Heritage Medical Group. Dmand AI also links Dr. Mahajan to 4 more hospitals, 3 medical groups and 1 group practice or clinic, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Shirish A. Mahajan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Mahajan practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Oncology Physicians Network of California | Available with a free account |
| +6 more sites and 3 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Shirish A. Mahajan is one of 1,502 hematologists and oncologists in California
Hematology and oncology is Dr. Mahajan's primary specialty in the NPI Registry, under taxonomy code 207RH0003X. Dr. Mahajan is board certified in medical oncology by the American Board of Internal Medicine. Dmand AI has Dr. Mahajan's licenses on file in 4 states: New York, California, Hawaii and New Mexico.
Specialties and state licenses
- Hematology and oncology, New YorkPrimary
- California license
- Hawaii license
- New Mexico license
Hematologists and oncologists near Dr. Mahajan
Counts of hematologists and oncologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Shirish A. Mahajan billed Medicare for 27,515 services in 2021
CMS data shows 27,515 Medicare services from Dr. Mahajan across 25 procedure codes in 2021. Medicare paid $837,049 for them. Every service was in an office.
Dr. Mahajan's Medicare services by type, 2020 to 2021
- 2020
- 2021
- Drugs given in the office
- 2020: 5,2912021: 24,549364%
- Tests and treatments
- 2020: 1,5842021: 1,30218%
- Office and hospital visits
- 2020: 8082021: 60525%
- Lab and pathology
- 2020: 8082021: 52735%
- Surgery
- 2020: 7582021: 30160%
- Other services
- 2020: 18,7552021: 23199%
Dr. Mahajan compared with the California median for hematologists and oncologists, 2021
- Dr. Mahajan
- California median
- Medicare services
- 27,515vs 93229.5 times
- Part D claims
- 19vs 39495% below
Medians across 1,367 hematologists and oncologists in California with Dmand AI profiles that report each measure.
Dr. Mahajan's most billed Medicare procedure codes, 2021
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Mahajan?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Mahajan and other hematologists and oncologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Shirish A. Mahajan's patients have a median age of 72
Across all payers, Dmand AI patient panel data puts Dr. Mahajan's median patient age at 72, with 57% women.
Dr. Mahajan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 72
Patient panel by sex, all payers
- Women57%
- Men43%
Source: Dmand AI Patient Panel Data
Dr. Shirish A. Mahajan wrote 69 Medicare Part D claims in 2024
In 2024, Dr. Mahajan wrote 69 Medicare Part D claims for 28 patients. 86% of them were for generic drugs. CMS names the drug for 19 of them, across 1 drug with 11 or more claims each, at $189 in total drug cost. In 2022, CMS named 71 claims across 3 drugs.
Dr. Mahajan's Part D claims by kind of drug, 2024
- Generic59 claims86%
- Brand-name and other10 claims14%
Dr. Mahajan's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2022 to 2024
- 2022
- 2024
- Claims for drugs CMS names
- 2022: 712024: 1973%
Drugs named by CMS: 1 in 2024, 3 in 2022.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
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Dr. Shirish A. Mahajan has 2 publications on record
Dmand AI links 2 papers to Dr. Mahajan in 2023. Dr. Mahajan's most frequent co-authors are Danny Da-Yeh Cheng, MD, Luis Armando Godoy, MD and Robert Justin Knebel.
Dr. Mahajan's most frequent co-authors
- Danny Da-Yeh Cheng, MD1 shared paper
- Luis Armando Godoy, MD1 shared paper
- Robert Justin Knebel1 shared paper
Recent publications by Dr. Mahajan
Arch Pathol Lab Med
See who Dr. Mahajan researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Mahajan works with, so you can find a warm path to the right hematologists and oncologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Shirish A. Mahajan received $15,546 in industry payments from 2016 to 2024
CMS Open Payments shows 785 general payments to Dr. Mahajan from 57 drug and device companies from 2016 to 2024. Food and beverage make up the largest share, 89% of the total. Amgen Inc. paid the most, $1,592.
General payments to Dr. Mahajan by program year, 2016 to 2024
General payments to Dr. Mahajan by kind, 2016 to 2024
- Food and beverage$13,78389%
- Education$1,76311%
Companies that paid Dr. Mahajan the most, 2016 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Shirish A. Mahajan graduated from Jawaharlal Institute of Postgraduate Medical Education and Research
Dr. Mahajan graduated from Jawaharlal Institute of Postgraduate Medical Education and Research in 1994.
- Medical school
- Board certified in medical oncology
Source: Dmand AI Professional Profile Data
Dr. Shirish A. Mahajan accepts plans from 15 insurance carriers
Dr. Mahajan is in network with 15 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 9. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Elevance
- HCSC
- Aspirus Health Plan
- Blue Cross Blue Shield of Massachusetts
- Molina
- +7 more carriersWith a free account
Plan types Dr. Mahajan accepts, by number of carriers
- PPO9
- HMO8
- Medicare8
- EPO4
- POS4
Source: Dmand AI Insurance Network Data
Sources for Dr. Shirish A. Mahajan's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Shirish A. Mahajan
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Shirish A. Mahajan's NPI number?
Dr. Shirish A. Mahajan's NPI number is 1609808856. It was assigned on July 7, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Shirish A. Mahajan?
Dr. Shirish A. Mahajan is a hematologist and oncologist in Victorville, California. The primary specialty in the NPI Registry is Hematology & Oncology Physician (taxonomy code 207RH0003X).
Where does Dr. Shirish A. Mahajan practice?
Dr. Mahajan practices at 12998 Hesperia Rd, Victorville, CA 92395. Dr. Mahajan's primary practice is Oncology Physicians Network of California in Victorville, California. Dmand AI also links Dr. Mahajan to 4 hospitals, 3 medical groups and 1 group practice or clinic.
What is Dr. Shirish A. Mahajan's office phone number?
The practice phone on file for Dr. Mahajan is (818) 507-4732.
What is Dr. Shirish A. Mahajan's medical license number?
Dr. Mahajan's New York license number on file is 001999, one of the licenses on file in 4 states.
Which states has Dr. Shirish A. Mahajan been licensed in?
Dmand AI has state licenses on file for Dr. Mahajan in New York (2003 to 2010), California (2008 to 2026), Hawaii (2024 to 2026) and New Mexico (2024 to 2025).
Which hospitals is Dr. Shirish A. Mahajan affiliated with?
Dr. Mahajan is affiliated with CHRISTUS Health. Dmand AI links Dr. Mahajan to 4 more hospitals.
What medical group is Dr. Shirish A. Mahajan part of?
Dr. Mahajan is linked to St. Jude Heritage Medical Group. Dmand AI links Dr. Mahajan to 3 more medical groups.
Does Dr. Shirish A. Mahajan accept Medicare?
Yes. CMS data shows Dr. Mahajan billed Medicare for 27,515 services in 2021.
Is Dr. Shirish A. Mahajan board certified?
Yes. Dr. Mahajan is board certified in medical oncology by the American Board of Internal Medicine.
Show 8 more questionsShow fewer questions
What services does Dr. Shirish A. Mahajan bill to Medicare?
In 2021, Dr. Mahajan's most billed Medicare services were injected or infused drug (J9271), injected or infused drug (J1642) and injected or infused drug (J2405).
Where did Dr. Shirish A. Mahajan go to medical school?
Dr. Mahajan graduated from Jawaharlal Institute of Postgraduate Medical Education and Research in 1994.
What drugs does Dr. Shirish A. Mahajan prescribe most?
In 2024 Medicare Part D data, Dr. Mahajan's most prescribed drugs by claims were Anastrozole.
Has Dr. Shirish A. Mahajan received payments from drug or device companies?
CMS Open Payments shows $15,546 in general payments to Dr. Mahajan from 57 companies from 2016 to 2024. The largest total came from Amgen Inc.
How long has Dr. Shirish A. Mahajan been practicing?
Dr. Mahajan graduated from medical school in 1994, 32 years ago.
Does Dr. Shirish A. Mahajan do research?
Dmand AI links 2 publications to Dr. Mahajan.
Who does Dr. Shirish A. Mahajan publish with?
Dr. Mahajan's most frequent co-authors are Danny Da-Yeh Cheng, MD (1 shared paper), Luis Armando Godoy, MD (1 shared paper) and Robert Justin Knebel (1 shared paper).
What insurance does Dr. Shirish A. Mahajan accept?
Dr. Mahajan is in network with 15 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 9. Check the plan with the practice before a visit.
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