2026 NPPES data Behavioral Neurology & Neuropsychiatry Physician NPI 1003834789 MD
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NIHAL DE SILVA, MD

Behavioral Neurology & Neuropsychiatry Physician in SAN DIEGO, California. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
1K
Medicare Part D claims · 84 beneficiaries · Behavioral Neurology & Neuropsychiatry Physician avg: 804

What the federal data shows

NIHAL DE SILVA, MD filed 1,286 Medicare Part D claims in 2023 as a Behavioral Neurology & Neuropsychiatry Physician in SAN DIEGO, California.

1K
Part D claims, 2023

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.

NIHAL DE SILVA, MD's Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023 — across all CMS prescribers nationally

1,286 Top 22% higher than 78% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). Below this entry. 400–600: 90,619 prescribers (7%). Below this entry. 600–800: 56,224 prescribers (4%). Below this entry. 800–1,000: 40,919 prescribers (3%). Below this entry. 1,000–1,200: 31,827 prescribers (2%). Below this entry. 1,200–1,400: 26,224 prescribers (2%). This entry sits in this band. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2,000–2,200: 213,991 prescribers (16%). Above this entry. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

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.

Source CMS Medicare Part D Prescriber Public Use File · 2023

Board-eligible specialty (heuristic — not verified)

NIHAL DE SILVA, MD practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).

What does the federal data show about NIHAL DE SILVA, MD?

Quality data not reported

NPI registry status

Active

Issued 07/18/2006

NPI 1003834789

Primary specialty

Behavioral Neurology & Neuropsychiatry Physician

Rare

268 US NPIs in this specialty

Medicare Part D claims

1,286 60% vs specialty avg

2023 prescription claims

Specialty avg: 804

Specialty distribution in California

How Behavioral Neurology & Neuropsychiatry Physician compares to other specialties among California providers

California providers

Behavioral Neurology & Neuropsychiatry Physician share within California

1. Behavioral Neurology & Neuropsychiatry Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Behavioral Neurology & Neuropsychiatry Physician share within California

Specialty board-certification context

Estimated specialty board-certified rate — Behavioral Neurology & Neuropsychiatry Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Behavioral Neurology & Neuropsychiatry Physician ABMS/AOA estimate

Est. board-certified rate (Behavioral Neurology & Neuropsychiatry Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Behavioral Neurology & Neuropsychiatry Physician) — ABMS / AOA estimate

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).

NIHAL DE SILVA, MD appears in the CMS NPPES registry as a Behavioral Neurology & Neuropsychiatry Physician provider holding MD credentials at 3525 DEL MAR HEIGHTS ROAD, SAN DIEGO, CA, 92130, with a listed phone of (973) 563-6220. NPI 1003834789 was issued on 07/18/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what DE SILVA most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 1,286 prescription claims written by this provider, covering 84 Medicare beneficiaries and totaling roughly $28K in drug spend. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

Behavioral Neurology & Neuropsychiatry Physician is a narrow specialty nationwide, with 268 enrolled providers across 43 states and an average of 804 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

3525 DEL MAR HEIGHTS ROAD
SAN DIEGO, CA 92130

Provider Details

NPI 1003834789
Specialty Behavioral Neurology & Neuropsychiatry Physician
Credentials MD
Gender Male
NPI Issued 07/18/2006

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 NIHAL DE SILVA, MD. To verify NIHAL DE SILVA, MD'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.

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

1,286
Total Claims
$28K
Total Drug Cost
84
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
1,493
Total Day Supply
43,657
Generic Drug Cost
$27K

Patient Demographics

Average Patient Age
65.2 years
Avg HCC Risk Score
1.47
Gender Split
64% female / 36% male
Age Distribution
<65: 31, 65-74: 37, 75-84: N/A, 85+: N/A

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

What NIHAL DE SILVA, MD prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Trazodone Hcl
163
Risperidone
110
Alprazolam
102
Paroxetine Hcl
102
Clonazepam
100
Olanzapine
98
Lorazepam
83
Fluoxetine Hcl
58
Quetiapine Fumarate
52
Duloxetine Hcl
47

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Behavioral Neurology & Neuropsychiatry Physician Overview

How NIHAL DE SILVA, MD fits within the Behavioral Neurology & Neuropsychiatry Physician landscape nationally.

268
Behavioral Neurology & Neuropsychiatry Physician Providers in US
43
States with Behavioral Neurology & Neuropsychiatry Physician
804
Avg Claims per Provider

NIHAL DE SILVA, MD's 1,286 claims are above the specialty average of 804.

Nearby Behavioral Neurology & Neuropsychiatry Physician Providers in California

Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as DE SILVA.

Compare Behavioral Neurology & Neuropsychiatry Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is NIHAL DE SILVA, MD's specialty?
NIHAL DE SILVA, MD specializes in Behavioral Neurology & Neuropsychiatry Physician and practices in SAN DIEGO, California. Credentials: MD.
How much does NIHAL DE SILVA, MD prescribe under Medicare Part D?
In 2023, NIHAL DE SILVA, MD wrote 1,286 Medicare Part D claims totaling $28K in drug costs for 84 beneficiaries.
Where is NIHAL DE SILVA, MD located?
NIHAL DE SILVA, MD is located at 3525 DEL MAR HEIGHTS ROAD, SAN DIEGO, CA, 92130. Phone: (973) 563-6220.
What is NIHAL DE SILVA, MD's NPI number?
NIHAL DE SILVA, MD's National Provider Identifier (NPI) is 1003834789, issued on 07/18/2006.
How many Behavioral Neurology & Neuropsychiatry Physician providers are there in the US?
There are 268 Behavioral Neurology & Neuropsychiatry Physician providers across 43 states in the US. The average Behavioral Neurology & Neuropsychiatry Physician provider writes 804 Medicare Part D claims per year.
What drugs does NIHAL DE SILVA, MD prescribe most often?
Based on 2023 Medicare Part D data, NIHAL DE SILVA, MD's most frequently prescribed drugs include Trazodone Hcl, Risperidone, Alprazolam. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does NIHAL DE SILVA, MD accept Medicare?
NIHAL DE SILVA, MD appears in CMS Medicare data with 1,286 Part D claims and 84 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify NIHAL DE SILVA, MD's credentials?
NIHAL DE SILVA, MD's NPI is 1003834789 with credentials MD. 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

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.
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