NPI registry status
Active
2026 NPPES data Physician Assistant NPI 1013281120
Verify on CMS → Gregory Miller
Physician Assistant in Corvallis, 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 150,974 in Physician Assistant, 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
3K
Medicare Part D claims · 204 beneficiaries · Physician Assistant avg: 790
Generic prescribing
83%
generic claims · 15% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$100
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
Gregory Miller filed 2,681 Medicare Part D claims in 2023 as a Physician Assistant in Corvallis, Oregon, prescribing 83% generic.
- 3K
- Part D claims, 2023
- 83%
- generic prescribing
- $100
- 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 Miller's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
2,681 Top 13% higher than 87% 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 Miller?
Quality data not reportedPrimary specialty
Physician Assistant
Medicare Part D claims
2,681 239% vs specialty avg
Specialty distribution in Oregon
How Physician Assistant 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 Physician Assistant. 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 Miller appears in the CMS NPPES registry as a Physician Assistant provider at 3640 NW SAMARITAN DR STE 100, Corvallis, OR, 97330, with a listed phone of (541) 768-5205. NPI 1013281120 was issued on 03/07/2012.
Medicare Part D records for calendar year 2023 show 2,681 prescription claims written by this provider, covering 204 Medicare beneficiaries and totaling roughly $266K in drug spend, split 15% brand-name and 83% generic by claim count, with an opioid prescribing rate of 3.4%.
Physician Assistant is a high-volume specialty nationwide, with 150,974 enrolled providers across 56 states and an average of 790 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 | 1013281120 |
|---|---|
| Specialty | Physician Assistant |
| Gender | Male |
| NPI Issued | 03/07/2012 |
Hospital and facility affiliations
Facilities where Gregory Miller 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.
According to CMS billing records, Gregory Miller is affiliated with 4 Medicare-billing facilities.
Albany General Hospital
Albany, OR
Good Samaritan Hospital Corvallis
Corvallis, OR
Mid-Valley Healthcare Inc
Lebanon, OR
Samaritan Pacific Health Services Inc
Newport, OR
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 Gregory Miller. Source: openpaymentsdata.cms.gov.
Total received
$100
Largest payer
ZOLL Services LLC (A/K/A ZOLL LifeCor Corp)
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 · Typical
Gregory Miller - brand share 15.0%
Physician Assistant average
15% brand-name claims vs 83% generic, on 2,681 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.
2,681
Total Claims
$266K
Total Drug Cost
204
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 4,520
- Total Day Supply
- 131,067
- Brand vs Generic
- 15% brand / 83% generic
- Brand Drug Cost
- $215K
- Generic Drug Cost
- $50K
- Opioid Claims
- 90 (3.4% rate)
- Antibiotic Claims
- 17
Patient Demographics
- Average Patient Age
- 63.2 years
- Avg HCC Risk Score
- 0.99
- Gender Split
- 51% female / 49% male
- Age Distribution
- <65: 78, 65-74: 93, 75-84: N/A, 85+: N/A
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Gregory Miller prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
149 claims
- Amlodipine Besylate
Amlodipine Besylate
102 claims
- Levothyroxine Sodium
Levothyroxine Sodium
99 claims
- Lisinopril
Lisinopril
89 claims
- Losartan Potassium
Losartan Potassium
81 claims
- Albuterol Sulfate …
Albuterol Sulfate Hfa
70 claims
- Gabapentin
Gabapentin
70 claims
- Metoprolol Succinate
Metoprolol Succinate
66 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 149 |
| Amlodipine Besylate | 102 |
| Levothyroxine Sodium | 99 |
| Lisinopril | 89 |
| Losartan Potassium | 81 |
| Albuterol Sulfate Hfa Albuterol Sulfate | 70 |
| Gabapentin | 70 |
| Metoprolol Succinate | 66 |
| Tamsulosin Hcl | 65 |
| Metformin Hcl Er Metformin Hcl | 62 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Physician Assistant Overview
How Gregory Miller fits within the Physician Assistant landscape nationally.
150,974
Physician Assistant Providers in US
56
States with Physician Assistant
790
Avg Claims per Provider
Gregory Miller's 2,681 claims are above the specialty average of 790.
Nearby Physician Assistant Providers in Oregon
Other clinicians with the same primary specialty enrolled in Oregon, drawn from the same CMS NPPES roster as Miller.
Dr. Alyssa Abbey
PA-C
Bend, OR
Dr. Matthew Abbott
PA-C
Portland, OR
Sanyi Yoseph Abdissa
Hermiston, OR
Dr. Emad Aboujaoude
PA
Portland, OR
Dr. Christopher Accola
PHARMD
Springfield, OR
Compare Physician Assistant 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 Physician Assistant 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
Learn more about finding, verifying, and understanding healthcare providers.
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 Oregon
Frequently Asked Questions
What is Gregory Miller's specialty? ▼
Gregory Miller specializes in Physician Assistant and practices in Corvallis, Oregon.
How much does Gregory Miller prescribe under Medicare Part D? ▼
In 2023, Gregory Miller wrote 2,681 Medicare Part D claims totaling $266K in drug costs for 204 beneficiaries.
Where is Gregory Miller located? ▼
Gregory Miller is located at 3640 NW SAMARITAN DR STE 100, Corvallis, OR, 97330. Phone: (541) 768-5205.
What is Gregory Miller's NPI number? ▼
Gregory Miller's National Provider Identifier (NPI) is 1013281120, issued on 03/07/2012.
Does Gregory Miller prescribe more brand-name or generic drugs? ▼
Gregory Miller's prescribing is 15% brand-name and 83% generic drugs by claim count, with $215K in brand drug costs.
Does Gregory Miller prescribe opioids? ▼
Yes, Gregory Miller had 90 opioid claims in 2023 with an opioid prescribing rate of 3.4%.
How many Physician Assistant providers are there in the US? ▼
There are 150,974 Physician Assistant providers across 56 states in the US. The average Physician Assistant provider writes 790 Medicare Part D claims per year.
What drugs does Gregory Miller prescribe most often? ▼
Based on 2023 Medicare Part D data, Gregory Miller's most frequently prescribed drugs include Atorvastatin Calcium, Amlodipine Besylate, Levothyroxine Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Gregory Miller accept Medicare? ▼
Gregory Miller appears in CMS Medicare data with 2,681 Part D claims and 204 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Gregory Miller's credentials? ▼
Gregory Miller's NPI is 1013281120. 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.