NPI registry status
Active
2026 NPPES data Psychiatry Physician NPI 1679561476 MD
Verify on CMS → Paul Chellappa, MD
Psychiatry Physician in Middletown, New York.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 53,171 in Psychiatry 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
1K
Medicare Part D claims · 64 beneficiaries · Psychiatry Physician avg: 1K
Generic prescribing
92%
generic claims · 8% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$695.23
20 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Paul Chellappa, MD filed 1,367 Medicare Part D claims in 2023 as a Psychiatry Physician in Middletown, New York, prescribing 92% generic.
- 1K
- Part D claims, 2023
- 92%
- generic prescribing
- $695.23
- industry payments (Sunshine Act)
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.
Paul Chellappa, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
1,367 Top 21% higher than 79% of 1,370,886 prescribers
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)
Paul Chellappa, 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 Paul Chellappa, MD?
Quality data not reportedPrimary specialty
Psychiatry Physician
Medicare Part D claims
1,367 32% vs specialty avg
Specialty distribution in New York
How Psychiatry Physician compares to other specialties among New York providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Psychiatry Physician. Verify directly:
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).
Paul Chellappa, MD appears in the CMS NPPES registry as a Psychiatry Physician provider holding MD credentials at 45 ASHLEY AVE, Middletown, NY, 10940, with a listed phone of (845) 342-7448. NPI 1679561476 was issued on 10/06/2005.
Medicare Part D records for calendar year 2023 show 1,367 prescription claims written by this provider, covering 64 Medicare beneficiaries and totaling roughly $403K in drug spend, split 8% brand-name and 92% generic by claim count.
Psychiatry Physician is a high-volume specialty nationwide, with 53,171 enrolled providers across 56 states and an average of 1,038 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 | 1679561476 |
|---|---|
| Specialty | Psychiatry Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 10/06/2005 |
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 Paul Chellappa, MD. Source: openpaymentsdata.cms.gov.
Total received
$695
Largest payer
Teva Pharmaceuticals USA, 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 - New York NYSBPMC 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 ~100K New York medical licensees in 2023 - they are NOT specific to Paul Chellappa, MD. To verify Paul Chellappa, MD's current license status, search the NYSBPMC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
312
Total board actions, New York 2023
Across 302 cases
3.12
Actions per 1,000 licensees
New York statewide rate
probation
Most common action type
89 cases
NYSBPMC 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 New York disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Generic-heavy
Paul Chellappa, MD - brand share 8.0%
Psychiatry Physician average
8% brand-name claims vs 92% generic, on 1,367 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.
1,367
Total Claims
$403K
Total Drug Cost
64
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,662
- Total Day Supply
- 49,332
- Brand vs Generic
- 8% brand / 92% generic
- Brand Drug Cost
- $348K
- Generic Drug Cost
- $55K
Patient Demographics
- Average Patient Age
- 61.9 years
- Avg HCC Risk Score
- 1.37
- Gender Split
- 55% female / 45% male
- Age Distribution
- <65: 36, 65-74: 19, 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 Paul Chellappa, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Benztropine Mesylate
Benztropine Mesylate
126 claims
- Risperidone
Risperidone
117 claims
- Clozapine
Clozapine
70 claims
- Buspirone Hcl
Buspirone Hcl
69 claims
- Aripiprazole
Aripiprazole
63 claims
- Fluoxetine Hcl
Fluoxetine Hcl
62 claims
- Bupropion Xl
Bupropion Xl
55 claims
- Quetiapine Fumarate
Quetiapine Fumarate
55 claims
| Drug | Claims |
|---|---|
| Benztropine Mesylate | 126 |
| Risperidone | 117 |
| Clozapine | 70 |
| Buspirone Hcl | 69 |
| Aripiprazole | 63 |
| Fluoxetine Hcl | 62 |
| Bupropion Xl Bupropion Hcl | 55 |
| Quetiapine Fumarate | 55 |
| Trazodone Hcl | 50 |
| Duloxetine Hcl | 34 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Psychiatry Physician Overview
How Paul Chellappa, MD fits within the Psychiatry Physician landscape nationally.
53,171
Psychiatry Physician Providers in US
56
States with Psychiatry Physician
1,038
Avg Claims per Provider
Paul Chellappa, MD's 1,367 claims are above the specialty average of 1,038.
Nearby Psychiatry Physician Providers in New York
Other clinicians with the same primary specialty enrolled in New York, drawn from the same CMS NPPES roster as Chellappa.
Muhammad Aadil
Bronx, NY
Dr. Geetha Aakalu
M.D.
Monticello, NY
Dr. Harry Aaron
M.D.
New York, NY
Dr. Lisa Aaron
MD
Peekskill, NY
Shelley Aarons
New York, NY
Compare Psychiatry 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 New York medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Psychiatry 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 Paul Chellappa, MD's specialty? ▼
Paul Chellappa, MD specializes in Psychiatry Physician and practices in Middletown, New York. Credentials: MD.
How much does Paul Chellappa, MD prescribe under Medicare Part D? ▼
In 2023, Paul Chellappa, MD wrote 1,367 Medicare Part D claims totaling $403K in drug costs for 64 beneficiaries.
Where is Paul Chellappa, MD located? ▼
Paul Chellappa, MD is located at 45 ASHLEY AVE, Middletown, NY, 10940. Phone: (845) 342-7448.
What is Paul Chellappa, MD's NPI number? ▼
Paul Chellappa, MD's National Provider Identifier (NPI) is 1679561476, issued on 10/06/2005.
Does Paul Chellappa, MD prescribe more brand-name or generic drugs? ▼
Paul Chellappa, MD's prescribing is 8% brand-name and 92% generic drugs by claim count, with $348K in brand drug costs.
How many Psychiatry Physician providers are there in the US? ▼
There are 53,171 Psychiatry Physician providers across 56 states in the US. The average Psychiatry Physician provider writes 1,038 Medicare Part D claims per year.
What drugs does Paul Chellappa, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Paul Chellappa, MD's most frequently prescribed drugs include Benztropine Mesylate, Risperidone, Clozapine. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Paul Chellappa, MD accept Medicare? ▼
Paul Chellappa, MD appears in CMS Medicare data with 1,367 Part D claims and 64 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Paul Chellappa, MD's credentials? ▼
Paul Chellappa, MD's NPI is 1679561476 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
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.
- 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
Compiled from official public sources by the PlainDoctor editorial team.
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.