NPI registry status
Active
2026 NPPES data Ophthalmology Physician NPI 1447992896
Verify on CMS → Nayanika Challa
Ophthalmology Physician in Chicago, 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 22,388 in Ophthalmology 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
402
Medicare Part D claims · 157 beneficiaries · Ophthalmology Physician avg: 1K
Generic prescribing
67%
generic claims · 33% 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
Nayanika Challa filed 402 Medicare Part D claims in 2024 as an Ophthalmology Physician in Chicago, Illinois, prescribing 67% generic.
- 402
- Part D claims, 2024
- 67%
- generic prescribing
- ≥61st
- 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 Nayanika Challa
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 1447992896), first enumerated 04/07/2022.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 402 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Practices in an ABMS-board-eligible specialty; board certification not confirmed in federal records.
- State context
State board disciplinary context
Illinois statewide board action statistics are published annually — these figures describe aggregate state activity, not Nayanika Challa'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 1447992896 · Ophthalmology Physician
NPI-10 · ENUM-RECENT · TAX-MID · RX-LIGHT · BOOK-LIGHT · PHOTO-ENUM
- NPI-10 1447992896
- ENUM-RECENT 2022
- TAX-MID 22K Ophthalmology Physician
- RX-LIGHT 402
- BOOK-LIGHT 891 in Illinois
- PHOTO-ENUM Christopher Le · 2022
Nayanika Challa's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
402 ≥ 61st percentile 61% 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
◑
Board-eligible specialty (heuristic, not verified)
Nayanika Challa 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 Nayanika Challa?
Quality data not reportedPrimary specialty
Ophthalmology Physician
Medicare Part D claims
402 73% vs specialty avg
Specialty distribution in Illinois
How Ophthalmology Physician 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 Ophthalmology 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).
Practice Address
Provider Details
| NPI | 1447992896 |
|---|---|
| Specialty | Ophthalmology Physician |
| Gender | Female |
| NPI Issued | 04/07/2022 |
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 Nayanika Challa. To verify Nayanika Challa'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 · Above average
Nayanika Challa - brand share 33.0%
Ophthalmology Physician average
33% brand-name claims vs 67% generic, on 402 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.
402
Total Claims
$29K
Total Drug Cost
157
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 709.267
- Total Day Supply
- 20,166
- Brand vs Generic
- 33% brand / 67% generic
- Brand Drug Cost
- $19K
- Generic Drug Cost
- $10K
Patient Demographics
- Average Patient Age
- 72.2 years
- Avg HCC Risk Score
- 1.28
- Gender Split
- 59% female / 41% male
- Age Distribution
- <65: 19, 65-74: 77, 75-84: 46, 85+: 15
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Nayanika Challa prescribes most
Top Medicare Part D drugs by claim count, 2024
- Latanoprost
Latanoprost
92 claims
- Dorzolamide-Timolol
Dorzolamide-Timolol
52 claims
- Brimonidine Tartrate
Brimonidine Tartrate
45 claims
- Prednisolone Acetate 36
Prednisolone Acetate
36 claims
- Timolol Maleate 20
Timolol Maleate
20 claims
- Travoprost 20
Travoprost
20 claims
- Dorzolamide Hcl 18
Dorzolamide Hcl
18 claims
- Rocklatan 13
Rocklatan
13 claims
| Drug | Claims |
|---|---|
| Latanoprost | 92 |
| Dorzolamide-Timolol Dorzolamide Hcl/Timolol Maleat | 52 |
| Brimonidine Tartrate | 45 |
| Prednisolone Acetate | 36 |
| Timolol Maleate | 20 |
| Travoprost | 20 |
| Dorzolamide Hcl | 18 |
| Rocklatan Netarsudil Mesylat/Latanoprost | 13 |
| Erythromycin Erythromycin Base | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Ophthalmology Physician Overview
How Nayanika Challa fits within the Ophthalmology Physician landscape nationally.
22,388
Ophthalmology Physician Providers in US
56
States with Ophthalmology Physician
1,490
Avg Claims per Provider
Nayanika Challa's 402 claims are below the specialty average of 1,490.
Nationwide Ophthalmology Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Challa, both outside Illinois so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2022)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Ophthalmology Physician Providers in Illinois
Other clinicians with the same primary specialty enrolled in Illinois, drawn from the same CMS NPPES roster as Challa.
One of 891 Ophthalmology Physician providers enrolled in Illinois, 5 are shown here.
Dr. Walid Abdallah
MD
Rockford, IL
Dr. Robert Abishek
MD
Chicago, IL
Dr. Ashley Abraham
M.D.
Springfield, IL
Dr. Evelyn Ackermann
MD
Elgin, IL
Dr. Kathleen Ackman Blake
MD
Hinsdale, IL
Compare Ophthalmology Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Nayanika Challa's specialty? ▼
Nayanika Challa specializes in Ophthalmology Physician and practices in Chicago, Illinois.
How much does Nayanika Challa prescribe under Medicare Part D? ▼
In 2024, Nayanika Challa wrote 402 Medicare Part D claims totaling $29K in drug costs for 157 beneficiaries.
Where is Nayanika Challa located? ▼
Nayanika Challa is located at 820 SOUTH WOOD STREET, Chicago, IL, 60612. Phone: (312) 996-2933.
What is Nayanika Challa's NPI number? ▼
Nayanika Challa's National Provider Identifier (NPI) is 1447992896, issued on 04/07/2022.
Does Nayanika Challa prescribe more brand-name or generic drugs? ▼
Nayanika Challa's prescribing is 33% brand-name and 67% generic drugs by claim count, with $19K in brand drug costs.
How many Ophthalmology Physician providers are there in the US? ▼
There are 22,388 Ophthalmology Physician providers across 56 states in the US. The average Ophthalmology Physician provider writes 1,490 Medicare Part D claims per year.
What drugs does Nayanika Challa prescribe most often? ▼
Based on 2024 Medicare Part D data, Nayanika Challa's most frequently prescribed drugs include Latanoprost, Dorzolamide-Timolol, Brimonidine Tartrate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Nayanika Challa accept Medicare? ▼
Nayanika Challa appears in CMS Medicare data with 402 Part D claims and 157 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Nayanika Challa's credentials? ▼
Nayanika Challa's NPI is 1447992896. 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.