NPI registry status
Active
2026 NPPES data Neurological Surgery Physician NPI 1508847187 M.D.
Verify on CMS → Ramanand Dandillaya, M.D.
Neurological Surgery Physician in Santa Maria, California.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 8,116 in Neurological Surgery Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
3K
Medicare Part D claims · 281 beneficiaries · Neurological Surgery Physician avg: 181
Generic prescribing
95%
generic claims · 3% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
75/100
CMS neutral threshold · no category scores published
Industry payments
$51.08
2 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Ramanand Dandillaya, M.D. carries the neutral CMS MIPS final score of 75/100, assigned where no category was scored - and filed 2,752 Medicare Part D claims in 2023.
- 75/100
- CMS neutral score · not measured
- 3K
- Part D claims, 2023
- 95%
- generic prescribing
- Likely
- board-certified (heuristic)
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
Ramanand Dandillaya, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
2,752 ≥ 88th percentile 88% of 1,370,886 prescribers are in lower value bands
Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2023
✓
Board certification likely (heuristic, not verified)
Ramanand Dandillaya, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Ramanand Dandillaya, M.D.?
CMS neutral score, not measuredPrimary specialty
Neurological Surgery Physician
Medicare Part D claims
2,752 15× vs specialty avg
MIPS final score
75/100
Specialty distribution in California
How Neurological Surgery Physician compares to other specialties among California providers
MIPS score not measured
CMS assigned a neutral 75/100 threshold
CMS did not publish any Quality, Cost, Promoting Interoperability, or Improvement Activities category score for this clinician. This administrative threshold is not comparable with the national average of clinicians whose MIPS score was measured.
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
Ramanand Dandillaya, M.D. appears in the CMS NPPES registry as a Neurological Surgery Physician provider holding M.D. credentials at 210 S PALISADE DR, Santa Maria, CA, 93454, with a listed phone of (805) 928-5851. NPI 1508847187 was issued on 11/09/2005.
Medicare Part D records for calendar year 2023 show 2,752 prescription claims written by this provider, covering 281 Medicare beneficiaries and totaling roughly $410K in drug spend, split 3% brand-name and 95% generic by claim count. On the CMS Merit-based Incentive Payment System, this provider carries a Final Score of 75/100 for the 2023 performance year, but CMS published no Quality, Promoting Interoperability, Improvement Activity or Cost score: this is the neutral performance threshold CMS assigns where nothing was scored, so it is not comparable with clinicians whose score was measured.
Neurological Surgery Physician is a mid-sized specialty nationwide, with 8,116 enrolled providers across 53 states and an average of 181 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline.
Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist, always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.
Practice Address
Provider Details
| NPI | 1508847187 |
|---|---|
| Specialty | Neurological Surgery Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 11/09/2005 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
75
Final Score
CMS neutral threshold · not measured
Reporting: Individual
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Ramanand Dandillaya, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$51
Largest payer
Mallinckrodt Hospital Products Inc.
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
License & disciplinary context - California MBC 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~150K California medical licensees in 2023 - they are NOT specific to Ramanand Dandillaya, M.D.. To verify Ramanand Dandillaya, M.D.'s current license status, search the MBC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
576
Total board actions, California 2023
Across 556 cases
3.84
Actions per 1,000 licensees
California statewide rate
probation
Most common action type
186 cases
MBC publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the California disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Generic-heavy
Ramanand Dandillaya, M.D. - brand share 3.0%
Neurological Surgery Physician average
3% brand-name claims vs 95% generic, on 2,752 2023 Medicare Part D claims.
The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
2,752
Total Claims
$410K
Total Drug Cost
281
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 3,743
- Total Day Supply
- 111,146
- Brand vs Generic
- 3% brand / 95% generic
- Brand Drug Cost
- $234K
- Generic Drug Cost
- $174K
Patient Demographics
- Average Patient Age
- 71.9 years
- Avg HCC Risk Score
- 1.51
- Gender Split
- 60% female / 40% male
- Age Distribution
- <65: 63, 65-74: 90, 75-84: 81, 85+: 47
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Ramanand Dandillaya, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Memantine Hcl
Memantine Hcl
612 claims
- Levetiracetam
Levetiracetam
255 claims
- Lamotrigine 191
Lamotrigine
191 claims
- Donepezil Hcl 180
Donepezil Hcl
180 claims
- Topiramate 154
Topiramate
154 claims
- Lacosamide 145
Lacosamide
145 claims
- Gabapentin 143
Gabapentin
143 claims
- Carbidopa-Levodopa 125
Carbidopa-Levodopa
125 claims
| Drug | Claims |
|---|---|
| Memantine Hcl | 612 |
| Levetiracetam | 255 |
| Lamotrigine | 191 |
| Donepezil Hcl | 180 |
| Topiramate | 154 |
| Lacosamide | 145 |
| Gabapentin | 143 |
| Carbidopa-Levodopa Carbidopa/Levodopa | 125 |
| Primidone | 98 |
| Carbamazepine | 57 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Neurological Surgery Physician Overview
How Ramanand Dandillaya, M.D. fits within the Neurological Surgery Physician landscape nationally.
8,116
Neurological Surgery Physician Providers in US
53
States with Neurological Surgery Physician
181
Avg Claims per Provider
Ramanand Dandillaya, M.D.'s 2,752 claims are above the specialty average of 181.
Nearby Neurological Surgery Physician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Dandillaya.
One of 880 Neurological Surgery Physician providers enrolled in California, 5 are shown here.
Dr. Samy Abdou
MD
San Diego, CA
Dr. Kumar Abhinav
BSC MBBS, FRCS(SN)
Stanford, CA
Dr. Moustapha Abou-Samra
MD
Ventura, CA
Dr. Bret Abshire
M.D.
Murrieta, CA
Dr. Deyaaldeen Abu Reesh
MD
Palo Alto, CA
Compare Neurological Surgery Physician nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the California medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Neurological Surgery Physician peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
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Frequently Asked Questions
What is Ramanand Dandillaya, M.D.'s specialty? ▼
Ramanand Dandillaya, M.D. specializes in Neurological Surgery Physician and practices in Santa Maria, California. Credentials: M.D..
How much does Ramanand Dandillaya, M.D. prescribe under Medicare Part D? ▼
In 2023, Ramanand Dandillaya, M.D. wrote 2,752 Medicare Part D claims totaling $410K in drug costs for 281 beneficiaries.
What is Ramanand Dandillaya, M.D.'s Medicare quality score? ▼
Ramanand Dandillaya, M.D. has a CMS MIPS Final Score of 75/100. CMS published no Quality, Promoting Interoperability, Improvement Activity or Cost score for this clinician, so the final score is the neutral performance threshold CMS assigns rather than a measured result. The average MIPS Final Score across the 454,083 clinicians with at least one published category score is 83.5; clinicians whose score CMS assigned without scoring any category are excluded from that average. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Ramanand Dandillaya, M.D. located? ▼
Ramanand Dandillaya, M.D. is located at 210 S PALISADE DR, Santa Maria, CA, 93454. Phone: (805) 928-5851.
What is Ramanand Dandillaya, M.D.'s NPI number? ▼
Ramanand Dandillaya, M.D.'s National Provider Identifier (NPI) is 1508847187, issued on 11/09/2005.
Does Ramanand Dandillaya, M.D. prescribe more brand-name or generic drugs? ▼
Ramanand Dandillaya, M.D.'s prescribing is 3% brand-name and 95% generic drugs by claim count, with $234K in brand drug costs.
How many Neurological Surgery Physician providers are there in the US? ▼
There are 8,116 Neurological Surgery Physician providers across 53 states in the US. The average Neurological Surgery Physician provider writes 181 Medicare Part D claims per year.
What drugs does Ramanand Dandillaya, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Ramanand Dandillaya, M.D.'s most frequently prescribed drugs include Memantine Hcl, Levetiracetam, Lamotrigine. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Ramanand Dandillaya, M.D. accept Medicare? ▼
Ramanand Dandillaya, M.D. appears in CMS Medicare data with 2,752 Part D claims and 281 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Ramanand Dandillaya, M.D.'s credentials? ▼
Ramanand Dandillaya, M.D.'s NPI is 1508847187 with credentials M.D.. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Prescribing Data
- CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Quality Performance
- CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.