2026 NPPES data Ophthalmology Physician NPI 1043292337 MD
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THOMAS CHOWATTUKUNNEL, MD

Ophthalmology Physician in MARION, Indiana. 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
2K
Medicare Part D claims · 463 beneficiaries · Ophthalmology Physician avg: 1K
Generic prescribing
59%
generic claims · 41% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$24.02
1 payments · CMS Open Payments (Sunshine Act)
What the federal data reveals: THOMAS CHOWATTUKUNNEL, MD is a Ophthalmology Physician ([object Object]) practicing in MARION, Indiana with a Medicare Part D prescribing footprint of 2K claims across 463 beneficiaries — 41% brand-name prescribing . Industry payments of $24.02 across 1 transactions are disclosed under CMS Open Payments (Sunshine Act).

What stands out: THOMAS CHOWATTUKUNNEL, MD filed 1,518 Medicare Part D claims in 2023 across MARION, Indiana. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board certification likely (heuristic — not verified)

THOMAS CHOWATTUKUNNEL, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 2 hospital affiliations — signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

THOMAS CHOWATTUKUNNEL, MD at a glance

Quality data not reported

NPI registry status

Active

Issued 11/14/2005

NPI 1043292337

Primary specialty

Ophthalmology Physician

Mid-sized

22,090 US NPIs in this specialty

Medicare Part D claims

1,518 7% vs specialty avg

2023 prescription claims

Specialty avg: 1,420

Specialty distribution in Indiana

How Ophthalmology Physician compares to other specialties among Indiana providers

Indiana providers

Ophthalmology Physician share within Indiana

1. Ophthalmology Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Ophthalmology Physician share within Indiana

Specialty board-certification context

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

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

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

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

THOMAS CHOWATTUKUNNEL, MD is a Ophthalmology Physician provider practicing in MARION, Indiana, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MD. NPI: 1043292337. 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.

THOMAS CHOWATTUKUNNEL, MD appears in the CMS NPPES registry as a Ophthalmology Physician provider holding MD credentials at 711 W GARDNER DR, MARION, IN, 46952, with a listed phone of (765) 662-6257. NPI 1043292337 was issued on 11/14/2005. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what CHOWATTUKUNNEL 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 1,518 prescription claims written by this provider, covering 463 Medicare beneficiaries and totaling roughly $182K in drug spend, split 41% brand-name and 59% 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.

Ophthalmology Physician is a mid-sized specialty nationwide, with 22,090 enrolled providers across 56 states and an average of 1,420 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

711 W GARDNER DR
MARION, IN 46952

Provider Details

NPI 1043292337
Specialty Ophthalmology Physician
Credentials MD
Gender Male
NPI Issued 11/14/2005

Hospital and facility affiliations

Facilities where THOMAS CHOWATTUKUNNEL, MD 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.

EYE PHYSICIANS INC
KOKOMO, IN
PULASKI MEMORIAL HOSPITAL
WINAMAC, IN
Critical Access Hospitals
CMS CCN: 151305

Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).

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 THOMAS CHOWATTUKUNNEL, MD. Source: openpaymentsdata.cms.gov.

Total received

$24

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.

Brand vs generic prescribing mix · Above average

THOMAS CHOWATTUKUNNEL, MD — brand share 41.0%
Specialty average (est.)

41% brand-name claims vs 59% generic, on 1,518 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.

1,518
Total Claims
$182K
Total Drug Cost
463
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
2,457
Total Day Supply
68,466
Brand vs Generic
41% brand / 59% generic
Brand Drug Cost
$146K
Generic Drug Cost
$36K
Antibiotic Claims
17

Patient Demographics

Average Patient Age
75.3 years
Avg HCC Risk Score
1.23
Gender Split
57% female / 43% male
Age Distribution
<65: 16, 65-74: 203, 75-84: 195, 85+: 49

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Prednisolone Acetate
336
Latanoprost
243
Polymyxin B Sul-Trimethoprim
Polymyxin B Sulf/Trimethoprim
217
Dorzolamide-Timolol
Dorzolamide Hcl/Timolol Maleat
93
Ketorolac Tromethamine
91
Lumigan
Bimatoprost
83
Moxifloxacin
Moxifloxacin Hcl
80
Timolol Maleate
51
Brimonidine Tartrate
42
Alphagan P
Brimonidine Tartrate
30

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

Ophthalmology Physician Overview

How THOMAS CHOWATTUKUNNEL, MD fits within the Ophthalmology Physician landscape nationally.

22,090
Ophthalmology Physician Providers in US
56
States with Ophthalmology Physician
1,420
Avg Claims per Provider

THOMAS CHOWATTUKUNNEL, MD's 1,518 claims are above the specialty average of 1,420.

Nearby Ophthalmology Physician Providers in Indiana

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

Compare Ophthalmology Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is THOMAS CHOWATTUKUNNEL, MD's specialty?
THOMAS CHOWATTUKUNNEL, MD specializes in Ophthalmology Physician and practices in MARION, Indiana. Credentials: MD.
How much does THOMAS CHOWATTUKUNNEL, MD prescribe under Medicare Part D?
In 2023, THOMAS CHOWATTUKUNNEL, MD wrote 1,518 Medicare Part D claims totaling $182K in drug costs for 463 beneficiaries.
Where is THOMAS CHOWATTUKUNNEL, MD located?
THOMAS CHOWATTUKUNNEL, MD is located at 711 W GARDNER DR, MARION, IN, 46952. Phone: (765) 662-6257.
What is THOMAS CHOWATTUKUNNEL, MD's NPI number?
THOMAS CHOWATTUKUNNEL, MD's National Provider Identifier (NPI) is 1043292337, issued on 11/14/2005.
Does THOMAS CHOWATTUKUNNEL, MD prescribe more brand-name or generic drugs?
THOMAS CHOWATTUKUNNEL, MD's prescribing is 41% brand-name and 59% generic drugs by claim count, with $146K in brand drug costs.
How many Ophthalmology Physician providers are there in the US?
There are 22,090 Ophthalmology Physician providers across 56 states in the US. The average Ophthalmology Physician provider writes 1,420 Medicare Part D claims per year.
What drugs does THOMAS CHOWATTUKUNNEL, MD prescribe most often?
Based on 2023 Medicare Part D data, THOMAS CHOWATTUKUNNEL, MD's most frequently prescribed drugs include Prednisolone Acetate, Latanoprost, Polymyxin B Sul-Trimethoprim. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does THOMAS CHOWATTUKUNNEL, MD accept Medicare?
THOMAS CHOWATTUKUNNEL, MD appears in CMS Medicare data with 1,518 Part D claims and 463 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify THOMAS CHOWATTUKUNNEL, MD's credentials?
THOMAS CHOWATTUKUNNEL, MD's NPI is 1043292337 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

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