Dr. Gana R Nadiga , MD
Ophthalmology • Longview, TX
2010 Bill Owens Pkwy
Longview, TX 756046210
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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NPI assigned on July 7, 2005; this date does not establish years in practice.
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Published CMS data list 585 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- 92012 — Established patient problem focused exam of visual system: 167 service units.
- 92014 — Established patient complete exam of visual system: 153 service units.
- 92133 — Imaging of optic nerve: 89 service units.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPT® only copyright 2023 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2024). CPT notice
See all 9 records in the table · Guide: How to read Medicare Part B data
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Published CMS data list 1,212 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Latanoprost — 449 prescription fills, including refills.
- Brimonidine Tartrate — 147 prescription fills, including refills.
- Prednisolone Acetate — 125 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 16 records in the table · Guide: How to read Medicare Part D prescriber data
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Fewer Medicare Part B services than 75% of clinicians listed under Ophthalmology in Texas (2024, 992 clinicians with data). Median for this group: 1,763. Middle half: 750 to 3,589.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 827 in 2020 to 585 in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020–2024.
Practice Location & Contact Primary Location
2010 Bill Owens Pkwy
Longview, TX 756046210
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
NPPES lists 1 additional practice-address record in Marshall, TX. See the list
Source: CMS NPPES NPI Registry, practice location records; release date unavailable.
CMS Doctors and Clinicians lists 1 group name: Marvin Kenneth Hall Iii. See the list
Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026
University Of Rochester School Of Medicine And Dentistry
1998
What Public CMS Data Show
Ophthalmology: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
204 people with Original Medicare in 2024
It gives a sense of how many people with Medicare this clinician treated that year.
Source: CMS, Medicare Physician & Other Practitioners – by Provider, 2024.
Medicare-allowed amount
About $59,628 in 2024
The total amount Medicare approved for these services in 2024. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.
It shows the total cost of this clinician's Original Medicare services under Medicare's fee rules.
What this does not show: Medicare-allowed amount
This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024.
Paid by Medicare
About $39,005 in 2024
The part of the Medicare-allowed amount that Medicare itself paid in 2024, after patients' deductibles and coinsurance.
The gap between the allowed amount and this number is roughly what patients and their other insurance paid.
What this does not show: Paid by Medicare
This is not the clinician's income and not a measure of quality.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024.
30-day fills
1,894 standardized 30-day fills in 2024
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$96,812 in 2024
The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024.
Industry payments (Open Payments)
Fewer than 11 payment records totaling $22.55 in 2024
Drug and medical device companies must report certain payments to doctors and some other clinicians to CMS, such as meals, travel, speaking fees or research funding.
It shows reported financial ties between this clinician and companies. You can ask your clinician about them.
These records are submitted by drug and medical device companies, and a reported payment does not necessarily mean the financial relationship is improper.
General: payments not tied to research, such as meals, travel, consulting or speaking fees.
A reported payment does not necessarily mean the financial relationship is improper. Research payments can go to a hospital or university for a study the clinician leads, not to the clinician personally. Clinicians can dispute records with the company that reported them.
Source: CMS Open Payments, program year 2024.
Years since graduation
28 years (graduated 1998)
CMS Doctors and Clinicians data list 1998 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished school.
What this does not show: Years since graduation
It is not the number of years in practice, and more years does not mean better care.
Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026.
NPI first issued
2005
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Accepts Medicare assignment
CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.
With Original Medicare, you usually pay only your deductible and coinsurance, and the office sends the claim to Medicare for you.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians, CMS release of October 2, 2026; Medicare.gov, “Does your provider accept Medicare as full payment?”
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians, CMS release of October 2, 2026.
Enrolled in Medicare (PECOS)
Dr. Nadiga has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Dr. Nadiga as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Longview and Texas
Billing and prescribing volume is not a quality rating.
Medicare Part B services
Fewer Medicare Part B services than 75% of clinicians listed under Ophthalmology in Texas (2024, 992 clinicians with data). Median for this group: 1,763. Middle half: 750 to 3,589.
Too few clinicians listed under Ophthalmology in Longview have Medicare Part B data for 2024 to compare.
Medicare-allowed amount
A lower Medicare-allowed amount than 80% of clinicians listed under Ophthalmology in Texas (2024, 992 clinicians with data). Median for this group: $212,221. Middle half: $85,606 to $414,307.
Too few clinicians listed under Ophthalmology in Longview have Medicare Part B data for 2024 to compare.
Paid by Medicare
A lower Medicare payment amount than 80% of clinicians listed under Ophthalmology in Texas (2024, 992 clinicians with data). Median for this group: $152,383. Middle half: $60,170 to $300,692.
Too few clinicians listed under Ophthalmology in Longview have Medicare Part B data for 2024 to compare.
Medicare Part D prescriptions
Close to the middle for clinicians listed under Ophthalmology in Texas (2024, 1,065 clinicians with data). Median for this group: 915. Middle half: 319 to 2,161.
Too few clinicians listed under Ophthalmology in Longview have Medicare Part D data for 2024 to compare.
Part D drug cost
Close to the middle for clinicians listed under Ophthalmology in Texas (2024, 1,065 clinicians with data). Median for this group: $73,842. Middle half: $14,153 to $240,871.
Too few clinicians listed under Ophthalmology in Longview have Medicare Part D data for 2024 to compare.
9 active clinicians are listed under Ophthalmology with a practice address in Longview, TX (1,514 in Texas).
Addresses are self-reported to NPPES and may be out of date.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part B services
Medicare Part B services decreased 29% from 827 in 2020 to 585 in 2024.
- 2020: 827
- 2021: 801
- 2022: 733
- 2023: 640
- 2024: 585
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Medicare-allowed amount
Medicare-allowed amount decreased 26% from $80,582 in 2020 to $59,628 in 2024.
- 2020: $80,582
- 2021: $83,809
- 2022: $80,721
- 2023: $72,219
- 2024: $59,628
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Paid by Medicare
Paid by Medicare decreased 27% from $53,101 in 2020 to $39,005 in 2024.
- 2020: $53,101
- 2021: $57,185
- 2022: $53,965
- 2023: $49,789
- 2024: $39,005
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Medicare Part D prescriptions
Medicare Part D prescriptions increased 26% from 963 in 2020 to 1,212 in 2024.
- 2020: 963
- 2021: 985
- 2022: 1,041
- 2023: 1,102
- 2024: 1,212
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30-day fills
30-day fills increased 25% from 1,520 in 2020 to 1,894 in 2024.
- 2020: 1,520
- 2021: 1,579
- 2022: 1,577
- 2023: 1,676
- 2024: 1,894
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Part D drug cost
Part D drug cost varied from year to year: $99,993 in 2020 and $96,812 in 2024.
- 2020: $99,993
- 2021: $116,137
- 2022: $159,008
- 2023: $158,052
- 2024: $96,812
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $122.49 in 2020 to $22.55 in 2024.
- 2020: $122.49
- 2021: $75.85
- 2022: $366.92
- 2023: $443.33
- 2024: $22.55
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), CMS Open Payments (2024), CMS Doctors and Clinicians, CMS release of October 2, 2026, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2024 (payments made January 1 – December 31, 2024): fewer than 11 records totaling $22.55.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Bausch & Lomb Americas Inc. |
Food and Beverage
In-kind items and services
|
VYZULTA | General | $22.55 |
Source: CMS Open Payments, program year 2024, released June 30, 2026.
Performed Procedures & Service Volume
CPT® is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016–2023 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners – by Provider and Service data, 2017–2024; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.
| HCPCS Code | Services | Patients | Submitted Charge | Medicare Allowed |
|---|---|---|---|---|
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92012
Established patient problem focused exam of visual system
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167 | 104 | $175.00 | $79.34 |
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92014
Established patient complete exam of visual system
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153 | 137 | $225.00 | $110.86 |
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92133
Imaging of optic nerve
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89 | 84 | $125.00 | $31.90 |
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92136
Measurement of corneal curvature and depth of eye
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55 | 25 | $106.45 | $22.64 |
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66984
Removal of cataract with insertion of prosthetic lens
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31 | 21 | $2900.00 | $466.84 |
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92004
New patient complete exam of visual system
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29 | 29 | $250.00 | $134.75 |
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92083
Exam of visual field with extended testing
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25 | 22 | $150.00 | $54.39 |
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66821
Removal of recurring cataract in lens capsule using a laser
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18 | 15 | $900.00 | $274.86 |
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92134
Imaging of retina
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18 | 14 | $125.00 | $35.87 |
Source: CMS Part B by Provider and Service, 2024; services under 11 beneficiaries omitted by CMS. Privacy limits
Submitted charges are billed amounts, not a price quote for your visit.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2024.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Latanoprost | Latanoprost | 449 | 22,472 | $2,866.14 | 98 |
| Brimonidine Tartrate | Brimonidine Tartrate | 147 | 7,336 | $3,293.38 | 41 |
| Prednisolone Acetate | Prednisolone Acetate | 125 | 3,550 | $6,434.20 | 78 |
| Moxifloxacin | Moxifloxacin Hcl | 91 | 1,401 | $2,320.20 | 65 |
| Ketorolac Tromethamine | Ketorolac Tromethamine | 77 | 3,242 | $1,551.46 | 56 |
| Rocklatan | Netarsudil Mesylat/Latanoprost | 51 | 1,364 | $18,412.63 | — |
| Restasis | Cyclosporine | 45 | 1,530 | $30,849.93 | 14 |
| Brimonidine Tartrate-Timolol | Brimonidine Tartrate/Timolol | 36 | 1,781 | $3,294.24 | — |
| Lumigan | Bimatoprost | 35 | 1,994 | $15,360.74 | 12 |
| Timolol Maleate | Timolol Maleate | 33 | 2,384 | $183.50 | 12 |
| Dorzolamide Hcl | Dorzolamide Hcl | 31 | 2,040 | $407.23 | — |
| Travoprost | Travoprost | 28 | 1,096 | $2,860.88 | — |
| Dorzolamide-Timolol | Dorzolamide Hcl/Timolol Maleat | 22 | 1,157 | $285.76 | — |
| Erythromycin | Erythromycin Base | 18 | 355 | $203.80 | 13 |
| Prolensa | Bromfenac Sodium | 13 | 717 | $4,566.20 | — |
| Combigan | Brimonidine Tartrate/Timolol | 11 | 649 | $3,921.75 | — |
Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2026-10-14NUCC Taxonomy Code: 207W00000X
An ophthalmologist has the knowledge and professional skills needed to provide comprehensive eye and vision care. Ophthalmologists are medically trained to diagnose, monitor and medically or surgically treat all ocular and visual disorders. This includes problems affecting the eye and its component structures, the eyelids, the orbit and the visual pathways. In so doing, an ophthalmologist prescribes vision services, including glasses and contact lenses.
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - OPHTHALMOLOGY
I20050215000414
TX
9830141100
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Medicare Group Practice Enrollments
Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026
Marvin Kenneth Hall Iii
405 E Pinecrest Dr, Marshall, TX 756707200
Phone: 9039388581
Secondary Practice Locations
405 E Pinecrest Dr Unit A
Marshall, TX 756707200
Phone: 9039388581
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Family Medicine
Doctor of Osteopathic Medicine (D.O.)
Physician Assistant
Physician Assistant (Certified)
Family Medicine
Doctor of Medicine (M.D.)
Physician Assistant
Physician Assistant (Certified)
Nurse Practitioner - Family
Advanced Practice Registered Nurse, Family Nurse Practitioner (Certified)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 2010 BILL OWENS PKWY, LONGVIEW, TX 756046210 (Tel: 9032473400)
Additional practice office at 405 E Pinecrest Dr Unit A, Marshall, TX 756707200
NPI status registered as active in NPPES database
Registered at 405 E PINECREST DR UNIT A, MARSHALL, TX 756707200 (Tel: 9039388581)
Registered at 405 E PINECREST DR UNIT A, MARSHALL, TX 756707200 (Tel: 9039388581)
Recorded as GANA NADIGA, MD
Ophthalmology (license number reported to NPPES: TX L9824)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Ophthalmology Specialists in Longview
- Dr. Joel Muirhead, MD
- Dr. Michael Guillory, MD
- Dr. David Risner, MD
- Dr. Craig King, MD
- Dr. Alden Gregston, MD
- Dr. Sawyer Hall, DO
Mailing Address
405 E Pinecrest Dr Unit A
Marshall, TX 756707200
Phone: 9039388581