NPI registry status
Active
2026 NPPES data General Practice Dentistry NPI 1972517985 D.D.S.
Verify on CMS → Gregory Alexander, D.D.S.
General Practice Dentistry in Portland, Oregon.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 121,642 in General Practice Dentistry, 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
104
Medicare Part D claims · 71 beneficiaries · General Practice Dentistry avg: 82
Industry payments
$445
1 payments · CMS Open Payments (Sunshine Act)
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Gregory Alexander, D.D.S. filed 104 Medicare Part D claims in 2023 as a General Practice Dentistry in Portland, Oregon.
- 104
- Part D claims, 2023
- $445
- 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.
Gregory Alexander, D.D.S.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
104 35th percentile higher than 35% 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 Gregory Alexander, D.D.S.?
Quality data not reportedPrimary specialty
General Practice Dentistry
Medicare Part D claims
104 27% vs specialty avg
Specialty distribution in Oregon
How General Practice Dentistry compares to other specialties among Oregon 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 General Practice Dentistry. 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).
Gregory Alexander, D.D.S. appears in the CMS NPPES registry as a General Practice Dentistry provider holding D.D.S. credentials at 7130 SW GARDEN HOME RD, Portland, OR, 97223, with a listed phone of (503) 245-3143. NPI 1972517985 was issued on 07/27/2006.
Medicare Part D records for calendar year 2023 show 104 prescription claims written by this provider, covering 71 Medicare beneficiaries and totaling roughly $590 in drug spend.
General Practice Dentistry is a high-volume specialty nationwide, with 121,642 enrolled providers across 56 states and an average of 82 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 | 1972517985 |
|---|---|
| Specialty | General Practice Dentistry |
| Credentials | D.D.S. |
| Gender | Male |
| NPI Issued | 07/27/2006 |
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 Gregory Alexander, D.D.S.. Source: openpaymentsdata.cms.gov.
Total received
$445
Largest payer
A-dec, Inc.
Most common payment type
Gift
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.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
104
Total Claims
$590
Total Drug Cost
71
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 104
- Total Day Supply
- 568
- Generic Drug Cost
- $475
- Antibiotic Claims
- 81
Patient Demographics
- Average Patient Age
- 77.6 years
- Avg HCC Risk Score
- 1.04
- Gender Split
- 62% female / 38% 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 |
|---|---|
| Amoxicillin | 61 |
| Azithromycin | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
General Practice Dentistry Overview
How Gregory Alexander, D.D.S. fits within the General Practice Dentistry landscape nationally.
121,642
General Practice Dentistry Providers in US
56
States with General Practice Dentistry
82
Avg Claims per Provider
Gregory Alexander, D.D.S.'s 104 claims are above the specialty average of 82.
Nearby General Practice Dentistry Providers in Oregon
Other clinicians with the same primary specialty enrolled in Oregon, drawn from the same CMS NPPES roster as Alexander.
Dr. Benjamin Aanderud
DMD
Sherwood, OR
Dr. Steven Abbott
DMD
Veneta, OR
Dr. Ruth Abraham
DDS
Keizer, OR
Jesse Achatz
Wilsonville, OR
Dr. Dennis Adair
D.M.D.
Gladstone, OR
Compare General Practice Dentistry 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 Oregon medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby General Practice Dentistry 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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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 Oregon
Frequently Asked Questions
What is Gregory Alexander, D.D.S.'s specialty? ▼
Gregory Alexander, D.D.S. specializes in General Practice Dentistry and practices in Portland, Oregon. Credentials: D.D.S..
How much does Gregory Alexander, D.D.S. prescribe under Medicare Part D? ▼
In 2023, Gregory Alexander, D.D.S. wrote 104 Medicare Part D claims totaling $590 in drug costs for 71 beneficiaries.
Where is Gregory Alexander, D.D.S. located? ▼
Gregory Alexander, D.D.S. is located at 7130 SW GARDEN HOME RD, Portland, OR, 97223. Phone: (503) 245-3143.
What is Gregory Alexander, D.D.S.'s NPI number? ▼
Gregory Alexander, D.D.S.'s National Provider Identifier (NPI) is 1972517985, issued on 07/27/2006.
How many General Practice Dentistry providers are there in the US? ▼
There are 121,642 General Practice Dentistry providers across 56 states in the US. The average General Practice Dentistry provider writes 82 Medicare Part D claims per year.
What drugs does Gregory Alexander, D.D.S. prescribe most often? ▼
Based on 2023 Medicare Part D data, Gregory Alexander, D.D.S.'s most frequently prescribed drugs include Amoxicillin, Azithromycin. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Gregory Alexander, D.D.S. accept Medicare? ▼
Gregory Alexander, D.D.S. appears in CMS Medicare data with 104 Part D claims and 71 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Gregory Alexander, D.D.S.'s credentials? ▼
Gregory Alexander, D.D.S.'s NPI is 1972517985 with credentials D.D.S.. 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.