NPI registry status
Active
2026 NPPES data Optometrist NPI 1477649895 O.D.
Verify on CMS → Sang An, O.D.
Optometrist in Carrollton, Texas.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 60,484 in 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
448
Medicare Part D claims · 168 beneficiaries · Optometrist avg: 257
Generic prescribing
35%
generic claims · 65% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$51.1
3 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Sang An, O.D. filed 448 Medicare Part D claims in 2023 as a Optometrist in Carrollton, Texas, prescribing 35% generic.
- 448
- Part D claims, 2023
- 35%
- generic prescribing
- $51.1
- industry payments (Sunshine Act)
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.
Sang An, O.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
448 Top 38% higher than 62% of 1,370,886 prescribers
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.
Source CMS Medicare Part D Prescriber Public Use File · 2023
What does the federal data show about Sang An, O.D.?
Quality data not reportedPrimary specialty
Optometrist
Medicare Part D claims
448 74% vs specialty avg
Specialty distribution in Texas
How Optometrist compares to other specialties among Texas 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 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).
Sang An, O.D. appears in the CMS NPPES registry as an Optometrist provider holding O.D. credentials at 2625 OLD DENTON RD, Carrollton, TX, 75007, with a listed phone of (972) 242-1652. NPI 1477649895 was issued on 10/04/2006.
Medicare Part D records for calendar year 2023 show 448 prescription claims written by this provider, covering 168 Medicare beneficiaries and totaling roughly $164K in drug spend, split 65% brand-name and 35% generic by claim count.
Optometrist is a high-volume specialty nationwide, with 60,484 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
Provider Details
| NPI | 1477649895 |
|---|---|
| Specialty | Optometrist |
| Credentials | O.D. |
| Gender | Male |
| NPI Issued | 10/04/2006 |
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 Sang An, O.D.. Source: openpaymentsdata.cms.gov.
Total received
$51
Largest payer
Alcon Vision LLC
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 - Texas TMB 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 ~77K Texas medical licensees in 2023 - they are NOT specific to Sang An, O.D.. To verify Sang An, O.D.'s current license status, search the TMB public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
344
Total board actions, Texas 2023
Across 334 cases
4.47
Actions per 1,000 licensees
Texas statewide rate
probation
Most common action type
94 cases
TMB 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 Texas disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Brand-heavy
Sang An, O.D. - brand share 65.0%
Optometrist average
65% brand-name claims vs 35% generic, on 448 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.
448
Total Claims
$164K
Total Drug Cost
168
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 604
- Total Day Supply
- 17,059
- Brand vs Generic
- 65% brand / 35% generic
- Brand Drug Cost
- $154K
- Generic Drug Cost
- $10K
Patient Demographics
- Average Patient Age
- 74.1 years
- Avg HCC Risk Score
- 1.20
- Gender Split
- 61% female / 39% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Sang An, O.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Restasis
Restasis
118 claims
- Latanoprost
Latanoprost
96 claims
- Xiidra 38
Xiidra
38 claims
- Cyclosporine 26
Cyclosporine
26 claims
- Dorzolamide-Timolol 22
Dorzolamide-Timolol
22 claims
- Tobramycin-Dexamet… 19
Tobramycin-Dexamethasone
19 claims
- Fluorometholone 17
Fluorometholone
17 claims
- Neomycin-Polymyxin… 14
Neomycin-Polymyxin-Dexameth
14 claims
| Drug | Claims |
|---|---|
| Restasis Cyclosporine | 118 |
| Latanoprost | 96 |
| Xiidra Lifitegrast | 38 |
| Cyclosporine | 26 |
| Dorzolamide-Timolol Dorzolamide Hcl/Timolol Maleat | 22 |
| Tobramycin-Dexamethasone Tobramycin/Dexamethasone | 19 |
| Fluorometholone | 17 |
| Neomycin-Polymyxin-Dexameth Neomycin/Polymyxin B/Dexametha | 14 |
| Loteprednol Etabonate | 13 |
| Flarex Fluorometholone Acetate | 12 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Optometrist Overview
How Sang An, O.D. fits within the Optometrist landscape nationally.
60,484
Optometrist Providers in US
56
States with Optometrist
257
Avg Claims per Provider
Sang An, O.D.'s 448 claims are above the specialty average of 257.
Nearby Optometrist Providers in Texas
Other clinicians with the same primary specialty enrolled in Texas, drawn from the same CMS NPPES roster as An.
Dr. Matthew Aaker
O.D.
Universal City, TX
Dr. Brad Aaron
O.D.
New Boston, TX
Dr. Michelle Aaron
O.D.
San Antonio, TX
Dr. Gary Abbott
OD
Randolph Afb, TX
Dr. Fortuna Abebe
OD
Houston, TX
Compare Optometrist nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the Texas medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Optometrist peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
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Frequently Asked Questions
What is Sang An, O.D.'s specialty? ▼
Sang An, O.D. specializes in Optometrist and practices in Carrollton, Texas. Credentials: O.D..
How much does Sang An, O.D. prescribe under Medicare Part D? ▼
In 2023, Sang An, O.D. wrote 448 Medicare Part D claims totaling $164K in drug costs for 168 beneficiaries.
Where is Sang An, O.D. located? ▼
Sang An, O.D. is located at 2625 OLD DENTON RD, Carrollton, TX, 75007. Phone: (972) 242-1652.
What is Sang An, O.D.'s NPI number? ▼
Sang An, O.D.'s National Provider Identifier (NPI) is 1477649895, issued on 10/04/2006.
Does Sang An, O.D. prescribe more brand-name or generic drugs? ▼
Sang An, O.D.'s prescribing is 65% brand-name and 35% generic drugs by claim count, with $154K in brand drug costs.
How many Optometrist providers are there in the US? ▼
There are 60,484 Optometrist providers across 56 states in the US. The average Optometrist provider writes 257 Medicare Part D claims per year.
What drugs does Sang An, O.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Sang An, O.D.'s most frequently prescribed drugs include Restasis, Latanoprost, Xiidra. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Sang An, O.D. accept Medicare? ▼
Sang An, O.D. appears in CMS Medicare data with 448 Part D claims and 168 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Sang An, O.D.'s credentials? ▼
Sang An, O.D.'s NPI is 1477649895 with credentials O.D.. 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 (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
Compiled from official public sources by the PlainDoctor editorial team.
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 May 2026.