NPI registry status
Active
2026 NPPES data Optometrist NPI 1699778621 O.D.
Verify on CMS → Michelle Diaz, O.D.
Optometrist in Kittery, Maine.
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
203
Medicare Part D claims · 81 beneficiaries · Optometrist avg: 257
Generic prescribing
65%
generic claims · 35% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
99.6/100
▲ 16 pts above national avg 83.1 · Exceptional
Industry payments
$107.3
1 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
Michelle Diaz, O.D. reported a CMS MIPS final score of 99.6/100 - above the 83.1 national average - and filed 203 Medicare Part D claims in 2023.
- 99.6/100
- MIPS score · +16 vs avg
- 203
- Part D claims, 2023
- 65%
- generic prescribing
- $107.3
- 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.
Michelle Diaz, O.D.'s MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
100 Top 9% higher than 91% of 477,587 scored providers
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
Where Michelle Diaz, O.D. sits
This provider among optometrist peers
Across the 6,527 optometrist providers who report both Medicare Part D prescribing and a MIPS quality score, Michelle Diaz, O.D. writes more Part D claims than 33% of them and scores higher on MIPS quality than 90% - placing this provider in the lower-volume, high-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Part D claim volume vs MIPS quality, by specialty percentile
Each dot is one optometrist peer from a representative sample of 60; the gold marker is Michelle Diaz, O.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
What does the federal data show about Michelle Diaz, O.D.?
High performer (top quartile)Primary specialty
Optometrist
Medicare Part D claims
203 21% vs specialty avg
MIPS final score
99.6/100 16.5 pts vs avg
Specialty distribution in Maine
How Optometrist compares to other specialties among Maine providers
Medicare quality performance, MIPS
Michelle Diaz, O.D.'s 2023 MIPS final score plotted against the Optometrist national average
- MIPS Final Score
- 99.6/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Optometrist) - 99.6/100 vs national avg 83.1
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).
Michelle Diaz, O.D. appears in the CMS NPPES registry as an Optometrist provider holding O.D. credentials at 99 US ROUTE 1 BYP, Kittery, ME, 03904, with a listed phone of (207) 439-0410. NPI 1699778621 was issued on 05/23/2005.
Medicare Part D records for calendar year 2023 show 203 prescription claims written by this provider, covering 81 Medicare beneficiaries and totaling roughly $28K in drug spend, split 35% brand-name and 65% generic by claim count. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 99.6/100 for the 2023 performance year (Quality 99.1), compared with the national average of 83.1.
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 | 1699778621 |
|---|---|
| Specialty | Optometrist |
| Credentials | O.D. |
| Gender | Female |
| NPI Issued | 05/23/2005 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
99.5716
Final Score
Avg: 83.1
99.1431
Quality
Reporting: Group practice
Hospital and facility affiliations
Facilities where Michelle Diaz, O.D. 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.
Kittery Optometric Associates
Kittery, ME
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 Michelle Diaz, O.D.. Source: openpaymentsdata.cms.gov.
Total received
$107
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
Michelle Diaz, O.D. - brand share 35.0%
Optometrist average
35% brand-name claims vs 65% generic, on 203 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.
203
Total Claims
$28K
Total Drug Cost
81
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 370
- Total Day Supply
- 10,054
- Brand vs Generic
- 35% brand / 65% generic
- Brand Drug Cost
- $24K
- Generic Drug Cost
- $4K
Patient Demographics
- Average Patient Age
- 74.0 years
- Avg HCC Risk Score
- 0.83
- Gender Split
- 53% female / 47% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Michelle Diaz, O.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Latanoprost
Latanoprost
41 claims
- Timolol Maleate
Timolol Maleate
34 claims
- Tobramycin-Dexamet… 16
Tobramycin-Dexamethasone
16 claims
- Brimonidine Tartrate 12
Brimonidine Tartrate
12 claims
- Dorzolamide-Timolol 11
Dorzolamide-Timolol
11 claims
| Drug | Claims |
|---|---|
| Latanoprost | 41 |
| Timolol Maleate | 34 |
| Tobramycin-Dexamethasone Tobramycin/Dexamethasone | 16 |
| Brimonidine Tartrate | 12 |
| Dorzolamide-Timolol Dorzolamide Hcl/Timolol Maleat | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Optometrist Overview
How Michelle Diaz, O.D. fits within the Optometrist landscape nationally.
60,484
Optometrist Providers in US
56
States with Optometrist
257
Avg Claims per Provider
Michelle Diaz, O.D.'s 203 claims are below the specialty average of 257.
Nearby Optometrist Providers in Maine
Other clinicians with the same primary specialty enrolled in Maine, drawn from the same CMS NPPES roster as Diaz.
Dr. Amy Abbott
O.D.
South Portland, ME
Dr. Andre Achenbach
O.D.
Brunswick, ME
Dr. Rachel Achenbach
OD
Windham, ME
Dr. Nirupama Aggarwal
OD
Portland, ME
Dr. Paul Albert
O.D.
Ellsworth, ME
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 Maine 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 Michelle Diaz, O.D.'s specialty? ▼
Michelle Diaz, O.D. specializes in Optometrist and practices in Kittery, Maine. Credentials: O.D..
How much does Michelle Diaz, O.D. prescribe under Medicare Part D? ▼
In 2023, Michelle Diaz, O.D. wrote 203 Medicare Part D claims totaling $28K in drug costs for 81 beneficiaries.
What is Michelle Diaz, O.D.'s Medicare quality score? ▼
Michelle Diaz, O.D. has a CMS MIPS Final Score of 99.6/100 (Quality: 99.1). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Michelle Diaz, O.D. located? ▼
Michelle Diaz, O.D. is located at 99 US ROUTE 1 BYP, Kittery, ME, 03904. Phone: (207) 439-0410.
What is Michelle Diaz, O.D.'s NPI number? ▼
Michelle Diaz, O.D.'s National Provider Identifier (NPI) is 1699778621, issued on 05/23/2005.
Does Michelle Diaz, O.D. prescribe more brand-name or generic drugs? ▼
Michelle Diaz, O.D.'s prescribing is 35% brand-name and 65% generic drugs by claim count, with $24K 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 Michelle Diaz, O.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Michelle Diaz, O.D.'s most frequently prescribed drugs include Latanoprost, Timolol Maleate, Tobramycin-Dexamethasone. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Michelle Diaz, O.D. accept Medicare? ▼
Michelle Diaz, O.D. appears in CMS Medicare data with 203 Part D claims and 81 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Michelle Diaz, O.D.'s credentials? ▼
Michelle Diaz, O.D.'s NPI is 1699778621 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.
- 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
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.