NPI registry status
Active
2026 NPPES data Specialist NPI 1417950783 M.D.
Verify on CMS → Elsy Devassy, M.D.
Specialist in Lockport, Illinois.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 69,567 in Specialist, 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 · 101 beneficiaries · Specialist avg: 2K
Generic prescribing
96%
generic claims · 4% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Elsy Devassy, M.D. filed 1,119 Medicare Part D claims in 2024 as a Specialist in Lockport, Illinois, prescribing 96% generic.
- 1K
- Part D claims, 2024
- 96%
- generic prescribing
- ≥77th
- pct by Part D claim volume (lower-bound band)
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.
Federal trust snapshot
What official records show about Elsy Devassy, M.D.
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1417950783), first enumerated 05/31/2005.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 1,119 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Hospital affiliations
1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- State context
State board disciplinary context
Illinois statewide board action statistics are published annually — these figures describe aggregate state activity, not Elsy Devassy, M.D.'s individual license status. Verify directly with the state medical board.
Source: IDFPR annual report 2023
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1417950783 · Specialist
NPI-10 · ENUM-LEGACY · TAX-MEGA · RX-MID · BOOK-LIGHT · PHOTO-ENUM
- NPI-10 1417950783
- ENUM-LEGACY 2005
- TAX-MEGA 70K Specialist
- RX-MID 1,119
- BOOK-LIGHT 1,419 in Illinois
- PHOTO-ENUM Gary Ginsberg, MD · 2005
Elsy Devassy, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
1,119 ≥ 77th percentile 77% of 1,416,883 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 · 2024
What does the federal data show about Elsy Devassy, M.D.?
Quality data not reportedPrimary specialty
Specialist
Medicare Part D claims
1,119 27% vs specialty avg
Specialty distribution in Illinois
How Specialist compares to other specialties among Illinois 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 Specialist. 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).
Practice Address
Provider Details
| NPI | 1417950783 |
|---|---|
| Specialty | Specialist |
| Credentials | M.D. |
| Gender | Female |
| NPI Issued | 05/31/2005 |
Hospital and facility affiliations
Facilities where Elsy Devassy, M.D. bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.
E A Devassy MD And Associates SC
Lockport, IL
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
License & disciplinary context - Illinois IDFPR 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 ~42K Illinois medical licensees in 2023 - they are NOT specific to Elsy Devassy, M.D.. To verify Elsy Devassy, M.D.'s current license status, search the IDFPR public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
106
Total board actions, Illinois 2023
Across 103 cases
2.52
Actions per 1,000 licensees
Illinois statewide rate
probation
Most common action type
38 cases
IDFPR 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 Illinois disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Generic-heavy
Elsy Devassy, M.D. - brand share 4.0%
Specialist average
4% brand-name claims vs 96% generic, on 1,119 2024 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 2024.
1,119
Total Claims
$220K
Total Drug Cost
101
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 2,001.033
- Total Day Supply
- 59,675
- Brand vs Generic
- 4% brand / 96% generic
- Brand Drug Cost
- $201K
- Generic Drug Cost
- $19K
Patient Demographics
- Average Patient Age
- 71.7 years
- Avg HCC Risk Score
- 1.31
- Gender Split
- 74% female / 26% male
- Age Distribution
- <65: 15, 65-74: 47, 75-84: N/A, 85+: N/A
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Elsy Devassy, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2024
- Alprazolam
Alprazolam
103 claims
- Escitalopram Oxalate
Escitalopram Oxalate
87 claims
- Aripiprazole
Aripiprazole
66 claims
- Fluoxetine Hcl
Fluoxetine Hcl
65 claims
- Lorazepam
Lorazepam
64 claims
- Clonazepam
Clonazepam
63 claims
- Bupropion Xl
Bupropion Xl
59 claims
- Trazodone Hcl
Trazodone Hcl
53 claims
| Drug | Claims |
|---|---|
| Alprazolam | 103 |
| Escitalopram Oxalate | 87 |
| Aripiprazole | 66 |
| Fluoxetine Hcl | 65 |
| Lorazepam | 64 |
| Clonazepam | 63 |
| Bupropion Xl Bupropion Hcl | 59 |
| Trazodone Hcl | 53 |
| Mirtazapine | 47 |
| Sertraline Hcl | 42 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Specialist Overview
How Elsy Devassy, M.D. fits within the Specialist landscape nationally.
69,567
Specialist Providers in US
55
States with Specialist
1,524
Avg Claims per Provider
Elsy Devassy, M.D.'s 1,119 claims are below the specialty average of 1,524.
Nationwide Specialist peers with similar MIPS or enrollment year
Two federal-record peer sets for Devassy, both outside Illinois so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2005)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Specialist Providers in Illinois
Other clinicians with the same primary specialty enrolled in Illinois, drawn from the same CMS NPPES roster as Devassy.
One of 1,419 Specialist providers enrolled in Illinois, 5 are shown here.
Dr. Sandra . Drewes
MD
Winfield, IL
Laketa Aaron
Bellwood, IL
Carrie Abbott-Walk
M.ED, DT
Dekalb, IL
Dr. Suhair Abdel-Jalil
MD
Evanston, IL
Dr. Babak Abdollahshamshirsaz
M.D.
Chicago, IL
Compare Specialist nationally: see state-by-state distribution →
Frequently Asked Questions
What is Elsy Devassy, M.D.'s specialty? ▼
Elsy Devassy, M.D. specializes in Specialist and practices in Lockport, Illinois. Credentials: M.D..
How much does Elsy Devassy, M.D. prescribe under Medicare Part D? ▼
In 2024, Elsy Devassy, M.D. wrote 1,119 Medicare Part D claims totaling $220K in drug costs for 101 beneficiaries.
Where is Elsy Devassy, M.D. located? ▼
Elsy Devassy, M.D. is located at 16612 W 159TH ST, Lockport, IL, 60441. Phone: (815) 588-3900.
What is Elsy Devassy, M.D.'s NPI number? ▼
Elsy Devassy, M.D.'s National Provider Identifier (NPI) is 1417950783, issued on 05/31/2005.
Does Elsy Devassy, M.D. prescribe more brand-name or generic drugs? ▼
Elsy Devassy, M.D.'s prescribing is 4% brand-name and 96% generic drugs by claim count, with $201K in brand drug costs.
How many Specialist providers are there in the US? ▼
There are 69,567 Specialist providers across 55 states in the US. The average Specialist provider writes 1,524 Medicare Part D claims per year.
What drugs does Elsy Devassy, M.D. prescribe most often? ▼
Based on 2024 Medicare Part D data, Elsy Devassy, M.D.'s most frequently prescribed drugs include Alprazolam, Escitalopram Oxalate, Aripiprazole. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Elsy Devassy, M.D. accept Medicare? ▼
Elsy Devassy, M.D. appears in CMS Medicare data with 1,119 Part D claims and 101 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Elsy Devassy, M.D.'s credentials? ▼
Elsy Devassy, M.D.'s NPI is 1417950783 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 (2024). 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 August 2026 (NPPES) / 2024 (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 August 2026.