2026 NPPES data Optometrist NPI 1740804798 OD
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LILIAN THOI, OD

Optometrist in GALLUP, New Mexico. 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
181
Medicare Part D claims · 78 beneficiaries · Optometrist avg: 257
Generic prescribing
51%
generic claims · 49% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
73.1296/100
▼ 10 pts below national avg 83.1 · [object Object]

What the federal data shows

LILIAN THOI, OD reported a CMS MIPS final score of 73.1296/100 — below the 83.1 national average — and filed 181 Medicare Part D claims in 2023.

73.1296/100
MIPS score · -10 vs avg
181
Part D claims, 2023
51%
generic prescribing

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.

LILIAN THOI, OD's MIPS score vs every scored U.S. clinician

CMS Merit-based Incentive Payment System (MIPS) final score, 2023 — the federal quality measure

73 11th percentile higher than 11% of 477,587 scored providers

0–10: 8,684 scored providers (2%). Below this entry. 10–20: 3,008 scored providers (1%). Below this entry. 20–30: 3,069 scored providers (1%). Below this entry. 30–40: 2,746 scored providers (1%). Below this entry. 40–50: 2,928 scored providers (1%). Below this entry. 50–60: 5,882 scored providers (1%). Below this entry. 60–70: 13,906 scored providers (3%). Below this entry. 70–80: 118,074 scored providers (25%). This entry sits in this band. 80–90: 129,887 scored providers (27%). Above this entry. 90–100: 189,403 scored providers (40%). Above this entry. This provider 0 100 every MIPS-scored clinician, bucketed by value

Each bar is a band; taller bars hold more scored providers. 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.

Source CMS Merit-based Incentive Payment System (MIPS) · 2023

What does the federal data show about LILIAN THOI, OD?

Below national average

NPI registry status

Active

Issued 06/05/2020

NPI 1740804798

Primary specialty

Optometrist

High-volume

60,463 US NPIs in this specialty

Medicare Part D claims

181 30% vs specialty avg

2023 prescription claims

Specialty avg: 257

MIPS final score

73.1296/100 9.970399999999998% pts

Mid-tier band

vs 83.1 national avg

Specialty distribution in New Mexico

How Optometrist compares to other specialties among New Mexico providers

New Mexico providers

Optometrist share within New Mexico

1. Optometrist42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Optometrist share within New Mexico

Medicare quality performance — MIPS

LILIAN THOI, OD's 2023 MIPS final score plotted against the Optometrist national average

Below national average
MIPS Final Score
73.1296/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Optometrist) — 73.1296/100 vs national avg 83.1

0%100%National avg83%73.1%
MIPS final score (Optometrist) — 73.1296/100 vs national avg 83.1

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).

LILIAN THOI, OD is a Optometrist provider practicing in GALLUP, New Mexico, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: OD. NPI: 1740804798. 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.

LILIAN THOI, OD appears in the CMS NPPES registry as a Optometrist provider holding OD credentials at 516 E NIZHONI BLVD, GALLUP, NM, 87301, with a listed phone of (505) 722-1000. NPI 1740804798 was issued on 06/05/2020. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what THOI 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 181 prescription claims written by this provider, covering 78 Medicare beneficiaries and totaling roughly $11K in drug spend, split 49% brand-name and 51% 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. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 73.1296/100 for the 2023 performance year (Quality 69.6371, Cost 49.4306), compared with the national average of 83.1.

Optometrist is a high-volume specialty nationwide, with 60,463 enrolled providers across 56 states and an average of 257 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

516 E NIZHONI BLVD
GALLUP, NM 87301

Provider Details

NPI 1740804798
Specialty Optometrist
Credentials OD
Gender Female
NPI Issued 06/05/2020

CMS Quality Score (MIPS)

Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.

73.1296
Final Score
Avg: 83.1
69.6371
Quality
49.4306
Cost

Reporting: Group practice

Hospital and facility affiliations

Facilities where LILIAN THOI, OD 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.

DHHS,PHS,NAIHS, GALLUP INDIAN MEDICAL CENTER
TOHATCHI, NM

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

Brand vs generic prescribing mix · Above average

LILIAN THOI, OD — brand share 49.0%
Specialty average (est.)

49% brand-name claims vs 51% generic, on 181 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.

181
Total Claims
$11K
Total Drug Cost
78
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
266
Total Day Supply
6,735
Brand vs Generic
49% brand / 51% generic
Brand Drug Cost
$5K
Generic Drug Cost
$6K

Patient Demographics

Average Patient Age
71.5 years
Avg HCC Risk Score
1.37
Gender Split
51% female / 49% male

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Latanoprost
62
Erythromycin
Erythromycin Base
22
Prednisolone Acetate
19
Brimonidine Tartrate
11
Neomycin-Polymyxin-Dexameth
Neomycin/Polymyxin B/Dexametha
11

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

Optometrist Overview

How LILIAN THOI, OD fits within the Optometrist landscape nationally.

60,463
Optometrist Providers in US
56
States with Optometrist
257
Avg Claims per Provider

LILIAN THOI, OD's 181 claims are below the specialty average of 257.

Nearby Optometrist Providers in New Mexico

Other clinicians with the same primary specialty enrolled in New Mexico, drawn from the same CMS NPPES roster as THOI.

Compare Optometrist nationally: see state-by-state distribution →

Frequently Asked Questions

What is LILIAN THOI, OD's specialty?
LILIAN THOI, OD specializes in Optometrist and practices in GALLUP, New Mexico. Credentials: OD.
How much does LILIAN THOI, OD prescribe under Medicare Part D?
In 2023, LILIAN THOI, OD wrote 181 Medicare Part D claims totaling $11K in drug costs for 78 beneficiaries.
What is LILIAN THOI, OD's Medicare quality score?
LILIAN THOI, OD has a CMS MIPS Final Score of 73.1296/100 (Quality: 69.6371, Cost: 49.4306). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is LILIAN THOI, OD located?
LILIAN THOI, OD is located at 516 E NIZHONI BLVD, GALLUP, NM, 87301. Phone: (505) 722-1000.
What is LILIAN THOI, OD's NPI number?
LILIAN THOI, OD's National Provider Identifier (NPI) is 1740804798, issued on 06/05/2020.
Does LILIAN THOI, OD prescribe more brand-name or generic drugs?
LILIAN THOI, OD's prescribing is 49% brand-name and 51% generic drugs by claim count, with $5K in brand drug costs.
How many Optometrist providers are there in the US?
There are 60,463 Optometrist providers across 56 states in the US. The average Optometrist provider writes 257 Medicare Part D claims per year.
What drugs does LILIAN THOI, OD prescribe most often?
Based on 2023 Medicare Part D data, LILIAN THOI, OD's most frequently prescribed drugs include Latanoprost, Erythromycin, Prednisolone Acetate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does LILIAN THOI, OD accept Medicare?
LILIAN THOI, OD appears in CMS Medicare data with 181 Part D claims and 78 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify LILIAN THOI, OD's credentials?
LILIAN THOI, OD's NPI is 1740804798 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

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.
Quality Performance
CMS Merit-based Incentive Payment System (MIPS) — 2023 performance year.
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