Dr. Neelan Joseph Marianayagam, MD, PhD
- Medicare services, 2024
- 35
- Medicare patients, 2024
- 67
- Publications
- 67
- MIPS score, 2024
- 89
- Hospital affiliations
- 1
- Practice address
- 751 South Bascom Avenue, San Jose, CA 95128
- Practice phone
- Call (408) 885-5000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Marianayagam's professional email, personal email and mobile number
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Dr. Neelan Joseph Marianayagam is a neurosurgeon in San Jose, California
Dr. Marianayagam practices at Santa Clara Valley Medical Center in San Jose, California, part of County of Santa Clara, CA.
Dr. Marianayagam's NPI, 1932547247, was assigned on June 8, 2013. Dr. Marianayagam graduated from Tel Aviv University Sackler in 2013. Dr. Marianayagam's California license number on file is C175135.
- NPI
- 1932547247NPI Registry (opens in a new tab)
- NPI enumeration date
- June 8, 2013
- NPI status
- Active
- Practice phone
- (408) 885-5000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 39
- Medical school graduation
- 2013
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Neelan Joseph Marianayagam practices at Santa Clara Valley Medical Center in San Jose, California
Dr. Marianayagam's primary practice is Santa Clara Valley Medical Center, at 751 South Bascom Avenue, San Jose, CA 95128 in Santa Clara County. The practice phone is (408) 885-5000.
- Santa Clara Valley Medical Center751 South Bascom Avenue, San Jose, CA 95128 · Santa Clara CountyPhone(408) 885-5000
Source: Dmand AI Affiliation Data
Dr. Neelan Joseph Marianayagam is affiliated with 2 sites of care and 1 medical group
Dr. Marianayagam's primary practice is Santa Clara Valley Medical Center in San Jose, California, part of County of Santa Clara, CA. The medical group on file is County of Santa Clara Behavioral Health Services, Las Plumas Behavioral Health Clinic. Dmand AI also links Dr. Marianayagam to 1 more community health center, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Neelan Joseph Marianayagam's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Marianayagam practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Santa Clara Valley 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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Dmand AI maps EHR vendors, IT decision makers and buying committees across County of Santa Clara, CA and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Neelan Joseph Marianayagam is one of 846 neurosurgeons in California
Neurological surgery is Dr. Marianayagam's primary specialty in the NPI Registry, under taxonomy code 207T00000X. Dmand AI has Dr. Marianayagam's licenses on file in 3 states: California, Florida and New York.
Specialties and state licenses
- Neurological surgery, CaliforniaPrimary
- Florida license
- New York license
Neurosurgeons near Dr. Marianayagam
Counts of neurosurgeons 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. Neelan Joseph Marianayagam billed Medicare for 35 services in 2024
CMS data shows 35 Medicare services from Dr. Marianayagam across 1 procedure code in 2024, for 67 Medicare patients. Medicare paid $2,453 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Marianayagam compared with the California median for neurosurgeons, 2024
- Dr. Marianayagam
- California median
- Medicare services
- 35vs 21684% below
- Medicare patients
- 67vs 15456% below
Medians across 679 neurosurgeons in California with Dmand AI profiles that report each measure.
Dr. Marianayagam's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Neelan Joseph Marianayagam treated 67 Medicare patients in 2024, average age 75
CMS counts 67 Medicare patients who saw Dr. Marianayagam in 2024. The largest group is 65 to 74, with 30 patients. 75% of them have high blood pressure, and 72% have high cholesterol. 49% are also on Medicaid. Their average risk score is 1.97, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Marianayagam's median patient age at 66, with 69% women.
Dr. Marianayagam's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Marianayagam's Medicare patients by sex, 2024
- Women3349%
- Men3451%
Chronic conditions among Dr. Marianayagam's Medicare patients, 2024
- High blood pressure75%
- High cholesterol72%
- Arthritis54%
- Depression51%
- Mood disorders51%
- Diabetes48%
- Stroke or TIA37%
- Anxiety33%
Share of Medicare patients with each condition. A patient can have several.
Dr. Marianayagam's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 66
Patient panel by sex, all payers
- Women69%
- Men31%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Neelan Joseph Marianayagam scored 89 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 89 out of 100 for Dr. Marianayagam for performance year 2024, reported as part of a group.
Dr. Marianayagam's MIPS scores, performance year 2024
- 89of 100Final score
- 87.1of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 70of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Source: Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Neelan Joseph Marianayagam has 67 publications on record
Dmand AI links 67 papers to Dr. Marianayagam, published from 2005 to 2025. 2023 was the busiest year, with 20. The most frequent topics are Brain Neoplasms, Radiosurgery and Meningeal Neoplasms. Dr. Marianayagam has published most often in J Neurosurg Case Lessons. Dr. Marianayagam's most frequent co-authors are Steven Daniel Chang, MD, David J. Park, MD and David Jaehyun Park, MD, PhD.
Dr. Marianayagam's papers by year, 2006 to 2025
Topics Dr. Marianayagam writes about most
- Brain Neoplasms
- Radiosurgery
- Meningeal Neoplasms
- Meningioma
- Models, Molecular
- Postoperative Complications
- Genomics
- Protein Conformation
Dr. Marianayagam's most frequent co-authors
- Steven Daniel Chang, MD21 shared papers
- David J. Park, MD19 shared papers
- David Jaehyun Park, MD, PhD16 shared papers
Recent publications by Dr. Marianayagam
See who Dr. Marianayagam researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Marianayagam works with, so you can find a warm path to the right neurosurgeons.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Neelan Joseph Marianayagam received $805 in industry payments from 2022 to 2025
CMS Open Payments shows 4 general payments to Dr. Marianayagam from 3 drug and device companies from 2022 to 2025. Food and beverage make up the largest share, 63% of the total. Stryker Corporation paid the most, $487.
General payments to Dr. Marianayagam by program year, 2022 to 2025
General payments to Dr. Marianayagam by kind, 2022 to 2025
- Food and beverage$50563%
- Grants$30037%
Companies that paid Dr. Marianayagam the most, 2022 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Neelan Joseph Marianayagam graduated from Tel Aviv University Sackler
Dr. Marianayagam graduated from Tel Aviv University Sackler in 2013. Dr. Marianayagam is a member of AANS, Congress of Neurological Surgeons and European Association of Neurosurgical Societies.
- Medical school
Source: Dmand AI Professional Profile Data
Dr. Neelan Joseph Marianayagam accepts plans from 7 insurance carriers
Dr. Marianayagam is in network with 7 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 4. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- Blue Cross Blue Shield of Massachusetts
- HCSC
- United Healthcare
- Blue Cross and Blue Shield of Kansas City
- CMS Medicare
Plan types Dr. Marianayagam accepts, by number of carriers
- Medicare4
- PPO4
- HMO3
- POS3
- EPO2
Source: Dmand AI Insurance Network Data
Sources for Dr. Neelan Joseph Marianayagam'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 DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Clinician Public Reporting: Overall MIPS Performance (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. Neelan Joseph Marianayagam
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. Neelan Joseph Marianayagam's NPI number?
Dr. Neelan Joseph Marianayagam's NPI number is 1932547247. It was assigned on June 8, 2013, and it is active in the NPI Registry.
What kind of doctor is Dr. Neelan Joseph Marianayagam?
Dr. Neelan Joseph Marianayagam is a neurosurgeon in San Jose, California. The primary specialty in the NPI Registry is Neurological Surgery Physician (taxonomy code 207T00000X).
Where does Dr. Neelan Joseph Marianayagam practice?
Dr. Marianayagam practices at 751 South Bascom Avenue, San Jose, CA 95128. Dr. Marianayagam's primary practice is Santa Clara Valley Medical Center in San Jose, California, part of County of Santa Clara, CA. Dmand AI also links Dr. Marianayagam to 1 community health center.
What is Dr. Neelan Joseph Marianayagam's office phone number?
The practice phone on file for Dr. Marianayagam is (408) 885-5000.
What is Dr. Neelan Joseph Marianayagam's medical license number?
Dr. Marianayagam's California license number on file is C175135, one of the licenses on file in 3 states.
Which states has Dr. Neelan Joseph Marianayagam been licensed in?
Dmand AI has state licenses on file for Dr. Marianayagam in California (2021 to 2025), Florida (2025 to 2027) and New York (2015 to 2026).
Which hospitals is Dr. Neelan Joseph Marianayagam affiliated with?
Dr. Marianayagam practices at Santa Clara Valley Medical Center in San Jose, California.
What medical group is Dr. Neelan Joseph Marianayagam part of?
Dr. Marianayagam is linked to County of Santa Clara Behavioral Health Services, Las Plumas Behavioral Health Clinic.
Does Dr. Neelan Joseph Marianayagam accept Medicare?
Yes. CMS data shows Dr. Marianayagam billed Medicare for 35 services in 2024.
What is Dr. Neelan Joseph Marianayagam's MIPS score?
Dr. Marianayagam's MIPS final score for performance year 2024 is 89 out of 100, reported as part of a group.
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How many Medicare patients does Dr. Neelan Joseph Marianayagam see?
CMS counts 67 Medicare patients who saw Dr. Marianayagam in 2024, with an average age of 75.
What services does Dr. Neelan Joseph Marianayagam bill to Medicare?
In 2024, Dr. Marianayagam's most billed Medicare services were hospital inpatient care (99232).
Where did Dr. Neelan Joseph Marianayagam go to medical school?
Dr. Marianayagam graduated from Tel Aviv University Sackler in 2013.
Has Dr. Neelan Joseph Marianayagam received payments from drug or device companies?
CMS Open Payments shows $805 in general payments to Dr. Marianayagam from 3 companies from 2022 to 2025. The largest total came from Stryker Corporation.
How long has Dr. Neelan Joseph Marianayagam been practicing?
Dr. Marianayagam graduated from medical school in 2013, 13 years ago.
Does Dr. Neelan Joseph Marianayagam do research?
Dmand AI links 67 publications to Dr. Marianayagam, published from 2005 to 2025.
Who does Dr. Neelan Joseph Marianayagam publish with?
Dr. Marianayagam's most frequent co-authors are Steven Daniel Chang, MD (21 shared papers), David J. Park, MD (19 shared papers) and David Jaehyun Park, MD, PhD (16 shared papers).
What insurance does Dr. Neelan Joseph Marianayagam accept?
Dr. Marianayagam is in network with 7 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 4. Check the plan with the practice before a visit.
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