2026 NPPES data Addiction Psychiatry Physician NPI 1801283692 MD,RN,MBA.;
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VIJAY CHANDRAN, MD,RN,MBA.;

Addiction Psychiatry Physician in SANTA ANA, 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
133
Medicare Part D claims · 15 beneficiaries · Addiction Psychiatry Physician avg: 792
Generic prescribing
92%
generic claims · 8% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$367.94
3 payments · CMS Open Payments (Sunshine Act)
What the federal data reveals: VIJAY CHANDRAN, MD,RN,MBA.; is a Addiction Psychiatry Physician ([object Object]) practicing in SANTA ANA, California with a Medicare Part D prescribing footprint of 133 claims across 15 beneficiaries — 8% brand-name prescribing . Industry payments of $367.94 across 3 transactions are disclosed under CMS Open Payments (Sunshine Act).

What stands out: VIJAY CHANDRAN, MD,RN,MBA.; filed 133 Medicare Part D claims in 2023 across SANTA ANA, California. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board-eligible specialty (heuristic — not verified)

VIJAY CHANDRAN, MD,RN,MBA.; 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).

VIJAY CHANDRAN, MD,RN,MBA.; at a glance

Quality data not reported

NPI registry status

Active

Issued 04/20/2015

NPI 1801283692

Primary specialty

Addiction Psychiatry Physician

Niche

667 US NPIs in this specialty

Medicare Part D claims

133 83% vs specialty avg

2023 prescription claims

Specialty avg: 792

Specialty distribution in California

How Addiction Psychiatry Physician compares to other specialties among California providers

California providers

Addiction Psychiatry Physician share within California

1. Addiction Psychiatry Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Addiction Psychiatry Physician share within California

Specialty board-certification context

Estimated specialty board-certified rate — Addiction Psychiatry Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Addiction Psychiatry Physician ABMS/AOA estimate

Est. board-certified rate (Addiction Psychiatry Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Addiction Psychiatry 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).

VIJAY CHANDRAN, MD,RN,MBA.; is a Addiction Psychiatry Physician provider practicing in SANTA ANA, California, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MD,RN,MBA.;. NPI: 1801283692. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

VIJAY CHANDRAN, MD,RN,MBA.; appears in the CMS NPPES registry as a Addiction Psychiatry Physician provider holding MD,RN,MBA.; credentials at 1030 W WARNER AVE, SANTA ANA, CA, 92707, with a listed phone of (213) 422-5483. NPI 1801283692 was issued on 04/20/2015. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what CHANDRAN 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 133 prescription claims written by this provider, covering 15 Medicare beneficiaries and totaling roughly $41K in drug spend, split 8% brand-name and 92% generic by claim count. 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.

Addiction Psychiatry Physician is a narrow specialty nationwide, with 667 enrolled providers across 49 states and an average of 792 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

1030 W WARNER AVE
SANTA ANA, CA 92707

Provider Details

NPI 1801283692
Specialty Addiction Psychiatry Physician
Credentials MD,RN,MBA.;
Gender Male
NPI Issued 04/20/2015

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 VIJAY CHANDRAN, MD,RN,MBA.;. Source: openpaymentsdata.cms.gov.

Total received

$368

Largest payer

Janssen Pharmaceuticals, 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 VIJAY CHANDRAN, MD,RN,MBA.;. To verify VIJAY CHANDRAN, MD,RN,MBA.;'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

VIJAY CHANDRAN, MD,RN,MBA.; — brand share 8.0%
Specialty average (est.)

8% brand-name claims vs 92% generic, on 133 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.

133
Total Claims
$41K
Total Drug Cost
15
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
254
Total Day Supply
7,507
Brand vs Generic
8% brand / 92% generic
Brand Drug Cost
$29K
Generic Drug Cost
$12K

Patient Demographics

Average Patient Age
54.7 years
Avg HCC Risk Score
1.81

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Aripiprazole
16
Hydroxyzine Pamoate
13

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

Addiction Psychiatry Physician Overview

How VIJAY CHANDRAN, MD,RN,MBA.; fits within the Addiction Psychiatry Physician landscape nationally.

667
Addiction Psychiatry Physician Providers in US
49
States with Addiction Psychiatry Physician
792
Avg Claims per Provider

VIJAY CHANDRAN, MD,RN,MBA.;'s 133 claims are below the specialty average of 792.

Nearby Addiction Psychiatry Physician Providers in California

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

Compare Addiction Psychiatry Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is VIJAY CHANDRAN, MD,RN,MBA.;'s specialty?
VIJAY CHANDRAN, MD,RN,MBA.; specializes in Addiction Psychiatry Physician and practices in SANTA ANA, California. Credentials: MD,RN,MBA.;.
How much does VIJAY CHANDRAN, MD,RN,MBA.; prescribe under Medicare Part D?
In 2023, VIJAY CHANDRAN, MD,RN,MBA.; wrote 133 Medicare Part D claims totaling $41K in drug costs for 15 beneficiaries.
Where is VIJAY CHANDRAN, MD,RN,MBA.; located?
VIJAY CHANDRAN, MD,RN,MBA.; is located at 1030 W WARNER AVE, SANTA ANA, CA, 92707. Phone: (213) 422-5483.
What is VIJAY CHANDRAN, MD,RN,MBA.;'s NPI number?
VIJAY CHANDRAN, MD,RN,MBA.;'s National Provider Identifier (NPI) is 1801283692, issued on 04/20/2015.
Does VIJAY CHANDRAN, MD,RN,MBA.; prescribe more brand-name or generic drugs?
VIJAY CHANDRAN, MD,RN,MBA.;'s prescribing is 8% brand-name and 92% generic drugs by claim count, with $29K in brand drug costs.
How many Addiction Psychiatry Physician providers are there in the US?
There are 667 Addiction Psychiatry Physician providers across 49 states in the US. The average Addiction Psychiatry Physician provider writes 792 Medicare Part D claims per year.
What drugs does VIJAY CHANDRAN, MD,RN,MBA.; prescribe most often?
Based on 2023 Medicare Part D data, VIJAY CHANDRAN, MD,RN,MBA.;'s most frequently prescribed drugs include Aripiprazole, Hydroxyzine Pamoate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does VIJAY CHANDRAN, MD,RN,MBA.; accept Medicare?
VIJAY CHANDRAN, MD,RN,MBA.; appears in CMS Medicare data with 133 Part D claims and 15 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify VIJAY CHANDRAN, MD,RN,MBA.;'s credentials?
VIJAY CHANDRAN, MD,RN,MBA.;'s NPI is 1801283692 with credentials MD,RN,MBA.;. 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