NPI registry status
Active
2026 NPPES data Optometrist NPI 1609997477 O.D.
Verify on CMS → Donald Hardt, O.D.
Optometrist in Saipan, Northern Mariana Islands.
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
29
Medicare Part D claims · 14 beneficiaries · Optometrist avg: 257
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Donald Hardt, O.D. filed 29 Medicare Part D claims in 2023 as an Optometrist in Saipan, Northern Mariana Islands.
- 29
- Part D claims, 2023
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.
Donald Hardt, O.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
29 0th percentile higher than 0% 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 Donald Hardt, O.D.?
Quality data not reportedPrimary specialty
Optometrist
Medicare Part D claims
29 89% vs specialty avg
Specialty distribution in Northern Mariana Islands
How Optometrist compares to other specialties among Northern Mariana Islands 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).
Donald Hardt, O.D. appears in the CMS NPPES registry as an Optometrist provider holding O.D. credentials at AMPARO BUILDING, BEACH ROAD, Saipan, MP, 96950, with a listed phone of (670) 235-2030. NPI 1609997477 was issued on 04/02/2007.
Medicare Part D records for calendar year 2023 show 29 prescription claims written by this provider, covering 14 Medicare beneficiaries and totaling roughly $710 in drug spend.
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 | 1609997477 |
|---|---|
| Specialty | Optometrist |
| Credentials | O.D. |
| Gender | Male |
| NPI Issued | 04/02/2007 |
Hospital and facility affiliations
Facilities where Donald Hardt, 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.
Hardt Eye Clinic Inc
Saipan, MP
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
29
Total Claims
$710
Total Drug Cost
14
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 29
- Total Day Supply
- 412
- Generic Drug Cost
- $605
Patient Demographics
- Average Patient Age
- 76.3 years
- Avg HCC Risk Score
- 0.91
- Age Distribution
- <65: 0, 65-74: N/A, 75-84: N/A, 85+: 0
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
| Drug | Claims |
|---|---|
| Neomycin-Polymyxin-Dexameth Neomycin/Polymyxin B/Dexametha | 13 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Optometrist Overview
How Donald Hardt, O.D. fits within the Optometrist landscape nationally.
60,484
Optometrist Providers in US
56
States with Optometrist
257
Avg Claims per Provider
Donald Hardt, O.D.'s 29 claims are below the specialty average of 257.
Nearby Optometrist Providers in Northern Mariana Islands
Other clinicians with the same primary specialty enrolled in Northern Mariana Islands, drawn from the same CMS NPPES roster as Hardt.
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 Northern Mariana Islands 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.
Healthcare Guides
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How to Find a Doctor
Step-by-step guide to choosing a provider
Verify Credentials
Check NPI, board certification & license status
Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
What prescribing data reveals about a provider
In-Network vs Out-of-Network
How insurance networks affect your costs
Telehealth Guide
Virtual care options and coverage in 2026
Explore Northern Mariana Islands
Frequently Asked Questions
What is Donald Hardt, O.D.'s specialty? ▼
Donald Hardt, O.D. specializes in Optometrist and practices in Saipan, Northern Mariana Islands. Credentials: O.D..
How much does Donald Hardt, O.D. prescribe under Medicare Part D? ▼
In 2023, Donald Hardt, O.D. wrote 29 Medicare Part D claims totaling $710 in drug costs for 14 beneficiaries.
Where is Donald Hardt, O.D. located? ▼
Donald Hardt, O.D. is located at AMPARO BUILDING, BEACH ROAD, Saipan, MP, 96950. Phone: (670) 235-2030.
What is Donald Hardt, O.D.'s NPI number? ▼
Donald Hardt, O.D.'s National Provider Identifier (NPI) is 1609997477, issued on 04/02/2007.
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 Donald Hardt, O.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Donald Hardt, O.D.'s most frequently prescribed drugs include Neomycin-Polymyxin-Dexameth. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Donald Hardt, O.D. accept Medicare? ▼
Donald Hardt, O.D. appears in CMS Medicare data with 29 Part D claims and 14 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Donald Hardt, O.D.'s credentials? ▼
Donald Hardt, O.D.'s NPI is 1609997477 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.