Dr. Niraj Chandrakant Mahajan, MD
- Medicare services, 2016
- 46
- Part D claims, 2024
- 630
- Hospital affiliations
- 2
- Industry payments
- $29
- Medical group
- 1
- Practice address
- 10800 Magnolia Avenue, Riverside, CA 92505
- Practice phone
- Call (951) 353-2000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Mahajan's professional email, personal email and mobile number
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Dr. Niraj Chandrakant Mahajan is an internist in Riverside, California
Dr. Mahajan practices at Riverside Medical Center in Riverside, California, part of Kaiser Permanente.
Dr. Mahajan's NPI, 1285825331, was assigned on August 5, 2007. Dr. Mahajan graduated from Bharti Vidyapeeth Medical College in 1999. Dr. Mahajan's Illinois license number on file is 36114440.
- NPI
- 1285825331NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0446391213
- NPI enumeration date
- August 5, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (951) 353-2000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 53
- Medical school graduation
- 1999
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Niraj Chandrakant Mahajan practices at Riverside Medical Center in Riverside, California
Dr. Mahajan's primary practice is Riverside Medical Center, at 10800 Magnolia Avenue, Riverside, CA 92505 in Riverside County. The practice phone is (951) 353-2000.
- Riverside Medical Center10800 Magnolia Avenue, Riverside, CA 92505 · Riverside CountyPhone(951) 353-2000
Source: Dmand AI Affiliation Data
Dr. Niraj Chandrakant Mahajan is affiliated with 2 sites of care and 1 medical group
Dr. Mahajan's primary practice is Riverside Medical Center in Riverside, California, part of Kaiser Permanente. Dr. Mahajan is also affiliated with Rush University Medical Center. The medical group on file is Southern California Permanente Medical Group.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Niraj Chandrakant Mahajan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Mahajan practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Riverside Medical Center | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Niraj Chandrakant Mahajan is one of 16,751 internists in California
Internal medicine is Dr. Mahajan's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Mahajan is board certified in internal medicine by the American Board of Internal Medicine. Dmand AI has Dr. Mahajan's licenses on file in 3 states: Illinois, California and Florida.
Specialties and state licenses
- Internal medicine, IllinoisPrimary
- California license
- Florida license
Internists near Dr. Mahajan
Counts of internists 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. Niraj Chandrakant Mahajan billed Medicare for 46 services in 2016
CMS data shows 46 Medicare services from Dr. Mahajan across 1 procedure code in 2016. Medicare paid $7,957 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Mahajan compared with the California median for internists, 2016
- Dr. Mahajan
- California median
- Medicare services
- 46vs 36187% below
- Part D claims
- 575vs 42137% above
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Mahajan's most billed Medicare procedure codes, 2016
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 internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Niraj Chandrakant Mahajan's patients have a median age of 70
Across all payers, Dmand AI patient panel data puts Dr. Mahajan's median patient age at 70, with 50% 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 70
Patient panel by sex, all payers
- Women50%
- Men50%
Source: Dmand AI Patient Panel Data
Dr. Niraj Chandrakant Mahajan wrote 630 Medicare Part D claims in 2024
In 2024, Dr. Mahajan wrote 630 Medicare Part D claims for 138 patients. 61% of them were for generic drugs. CMS names the drug for 575 of them, across 10 drugs with 11 or more claims each, at $96,027 in total drug cost. In 2023, CMS named 661 claims across 10 drugs.
Dr. Mahajan's Part D claims by kind of drug, 2024
- Generic386 claims61%
- Brand-name244 claims39%
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.
Drug classes CMS tracks in Dr. Mahajan's Part D claims, 2024
- Antibiotics8%48 of 630 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 6612024: 57513%
Drugs named by CMS: 10 in 2024, 10 in 2023.
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
How Dr. Niraj Chandrakant Mahajan takes part in Medicare
Dr. Mahajan accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Niraj Chandrakant Mahajan received $29 in industry payments in 2023
CMS Open Payments shows 2 general payments to Dr. Mahajan from 2 drug and device companies in 2023. Food and beverage make up the largest share, 100% of the total. Pulmonx Corporation paid the most, $15.
Companies that paid Dr. Mahajan the most, 2023 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Niraj Chandrakant Mahajan graduated from Bharti Vidyapeeth Medical College
Dr. Mahajan graduated from Bharti Vidyapeeth Medical College in 1999.
- Medical school
- Board certified in internal medicine
- Board certified in pulmonary disease
Source: Dmand AI Professional Profile Data
Dr. Niraj Chandrakant Mahajan accepts plans from 3 insurance carriers
Dr. Mahajan is in network with 3 carriers, including Aetna, Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 2. Check the plan with the practice before a visit.
- Aetna
- Kaiser Permanente
- CMS Medicare
Plan types Dr. Mahajan accepts, by number of carriers
- EPO2
- HMO2
- Medicare2
- POS2
- PPO1
Source: Dmand AI Insurance Network Data
Sources for Dr. Niraj Chandrakant 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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy 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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| 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. Niraj Chandrakant 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. Niraj Chandrakant Mahajan's NPI number?
Dr. Niraj Chandrakant Mahajan's NPI number is 1285825331. It was assigned on August 5, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Niraj Chandrakant Mahajan?
Dr. Niraj Chandrakant Mahajan is an internist in Riverside, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Niraj Chandrakant Mahajan practice?
Dr. Mahajan practices at 10800 Magnolia Avenue, Riverside, CA 92505. Dr. Mahajan's primary practice is Riverside Medical Center in Riverside, California, part of Kaiser Permanente.
What is Dr. Niraj Chandrakant Mahajan's office phone number?
The practice phone on file for Dr. Mahajan is (951) 353-2000.
What is Dr. Niraj Chandrakant Mahajan's medical license number?
Dr. Mahajan's Illinois license number on file is 36114440, one of the licenses on file in 3 states.
Which states has Dr. Niraj Chandrakant Mahajan been licensed in?
Dmand AI has state licenses on file for Dr. Mahajan in Illinois (2003 to 2011), California (2009 to 2027) and Florida (2010 to 2015).
Which hospitals is Dr. Niraj Chandrakant Mahajan affiliated with?
Dr. Mahajan practices at Riverside Medical Center in Riverside, California. Dr. Mahajan is also affiliated with Rush University Medical Center.
What medical group is Dr. Niraj Chandrakant Mahajan part of?
Dr. Mahajan is linked to Southern California Permanente Medical Group.
Does Dr. Niraj Chandrakant Mahajan accept Medicare?
Yes. CMS data shows Dr. Mahajan billed Medicare for 46 services in 2016, and Dr. Mahajan accepts Medicare assignment.
Is Dr. Niraj Chandrakant Mahajan board certified?
Yes. Dr. Mahajan is board certified in internal medicine by the American Board of Internal Medicine.
Show 6 more questionsShow fewer questions
What services does Dr. Niraj Chandrakant Mahajan bill to Medicare?
In 2016, Dr. Mahajan's most billed Medicare services were critical care (99291).
Where did Dr. Niraj Chandrakant Mahajan go to medical school?
Dr. Mahajan graduated from Bharti Vidyapeeth Medical College in 1999.
What drugs does Dr. Niraj Chandrakant Mahajan prescribe most?
In 2024 Medicare Part D data, Dr. Mahajan's most prescribed drugs by claims were Spiriva Respimat, Wixela Inhub and Albuterol Sulfate Hfa.
Has Dr. Niraj Chandrakant Mahajan received payments from drug or device companies?
CMS Open Payments shows $29 in general payments to Dr. Mahajan from 2 companies from 2023 to 2023. The largest total came from Pulmonx Corporation.
How long has Dr. Niraj Chandrakant Mahajan been practicing?
Dr. Mahajan graduated from medical school in 1999, 27 years ago.
What insurance does Dr. Niraj Chandrakant Mahajan accept?
Dr. Mahajan is in network with 3 carriers, including Aetna, Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 2. Check the plan with the practice before a visit.
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