NPI registry status
Active
2026 NPPES data Corneal and Contact Management Optometrist NPI 1235859612 OD
Verify on CMS → Zacharia Askar, OD
Corneal and Contact Management Optometrist 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 1,539 in Corneal and Contact Management Optometrist, 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
89
Medicare Part D claims · 23 beneficiaries · Corneal and Contact Management Optometrist avg: 254
Generic prescribing
70%
generic claims · 30% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$2.0K
19 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Zacharia Askar, OD filed 89 Medicare Part D claims in 2024 as a Corneal and Contact Management Optometrist in Chicago, Illinois, prescribing 70% generic.
- 89
- Part D claims, 2024
- 70%
- generic prescribing
- $2.0K
- industry payments (Sunshine Act)
- ≥0th
- 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 Zacharia Askar, OD
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 1235859612), first enumerated 08/29/2022.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 89 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Industry payment transparency
$2.0K in reported industry payments (19 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- State context
State board disciplinary context
Illinois statewide board action statistics are published annually — these figures describe aggregate state activity, not Zacharia Askar, OD'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 1235859612 · Corneal and Contact Management Optometrist
NPI-10 · ENUM-RECENT · TAX-NARROW · RX-TRACE · BOOK-THIN · PHOTO-ENUM
- NPI-10 1235859612
- ENUM-RECENT 2022
- TAX-NARROW 1,539
- RX-TRACE 89
- BOOK-THIN 60 in Illinois
- PHOTO-ENUM Dane Tosland · 2022
Zacharia Askar, OD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
89 ≥ 0th percentile 0% 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 Zacharia Askar, OD?
Quality data not reportedPrimary specialty
Corneal and Contact Management Optometrist
Medicare Part D claims
89 65% vs specialty avg
Specialty distribution in Illinois
How Corneal and Contact Management Optometrist 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 Corneal and Contact Management Optometrist. 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 | 1235859612 |
|---|---|
| Specialty | Corneal and Contact Management Optometrist |
| Credentials | OD |
| Gender | Male |
| NPI Issued | 08/29/2022 |
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 Zacharia Askar, OD. Source: openpaymentsdata.cms.gov.
Total received
$2.0K
Largest payer
Bausch & Lomb Americas 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 - 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 Zacharia Askar, OD. To verify Zacharia Askar, OD'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
Zacharia Askar, OD - brand share 30.0%
Corneal and Contact Management Optometrist average
30% brand-name claims vs 70% generic, on 89 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.
89
Total Claims
$3K
Total Drug Cost
23
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 120.033
- Total Day Supply
- 2,957
- Brand vs Generic
- 30% brand / 70% generic
- Brand Drug Cost
- $2K
- Generic Drug Cost
- $615
Patient Demographics
- Average Patient Age
- 71.4 years
- Avg HCC Risk Score
- 0.92
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
| Drug | Claims |
|---|---|
| Latanoprost | 46 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Corneal and Contact Management Optometrist in IL →
All providers in Illinois →
Compare specialties →
Corneal and Contact Management Optometrist Overview
How Zacharia Askar, OD fits within the Corneal and Contact Management Optometrist landscape nationally.
1,539
Corneal and Contact Management Optometrist Providers in US
52
States with Corneal and Contact Management Optometrist
254
Avg Claims per Provider
Zacharia Askar, OD's 89 claims are below the specialty average of 254.
Nationwide Corneal and Contact Management Optometrist peers with similar MIPS or enrollment year
Two federal-record peer sets for Askar, 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 Corneal and Contact Management Optometrist Providers in Illinois
Other clinicians with the same primary specialty enrolled in Illinois, drawn from the same CMS NPPES roster as Askar.
One of 60 Corneal and Contact Management Optometrist providers enrolled in Illinois, 5 are shown here.
Dr. Magdalena Adas
O.D.
Skokie, IL
Dr. Tiffany Andrzejewski
OD
Highland Park, IL
Ada Avary
Bloomingdale, IL
Dr. Javeria Azhar
O.D.
Downers Grove, IL
Dr. Douglas Azzaro
O.D.
Woodridge, IL
Compare Corneal and Contact Management Optometrist nationally: see state-by-state distribution →
Frequently Asked Questions
What is Zacharia Askar, OD's specialty? ▼
Zacharia Askar, OD specializes in Corneal and Contact Management Optometrist and practices in Chicago, Illinois. Credentials: OD.
How much does Zacharia Askar, OD prescribe under Medicare Part D? ▼
In 2024, Zacharia Askar, OD wrote 89 Medicare Part D claims totaling $3K in drug costs for 23 beneficiaries.
Where is Zacharia Askar, OD located? ▼
Zacharia Askar, OD is located at 4920 N CENTRAL AVE STE 1B, Chicago, IL, 60630. Phone: (773) 777-6615.
What is Zacharia Askar, OD's NPI number? ▼
Zacharia Askar, OD's National Provider Identifier (NPI) is 1235859612, issued on 08/29/2022.
Does Zacharia Askar, OD prescribe more brand-name or generic drugs? ▼
Zacharia Askar, OD's prescribing is 30% brand-name and 70% generic drugs by claim count, with $2K in brand drug costs.
How many Corneal and Contact Management Optometrist providers are there in the US? ▼
There are 1,539 Corneal and Contact Management Optometrist providers across 52 states in the US. The average Corneal and Contact Management Optometrist provider writes 254 Medicare Part D claims per year.
What drugs does Zacharia Askar, OD prescribe most often? ▼
Based on 2024 Medicare Part D data, Zacharia Askar, OD's most frequently prescribed drugs include Latanoprost. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Zacharia Askar, OD accept Medicare? ▼
Zacharia Askar, OD appears in CMS Medicare data with 89 Part D claims and 23 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Zacharia Askar, OD's credentials? ▼
Zacharia Askar, OD's NPI is 1235859612 with credentials OD. 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.