NPI registry status
Active
2026 NPPES data Hematology (Internal Medicine) Physician NPI 1255364972 MD
Verify on CMS → Ellen Michaelson, MD
Hematology (Internal Medicine) Physician 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 1,436 in Hematology (Internal Medicine) Physician, 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
493
Medicare Part D claims · 38 beneficiaries · Hematology (Internal Medicine) Physician avg: 693
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Ellen Michaelson, MD filed 493 Medicare Part D claims in 2023 as a Hematology (Internal Medicine) Physician in Portland, Oregon.
- 493
- 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.
Ellen Michaelson, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
493 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
◑
Board-eligible specialty (heuristic, not verified)
Ellen Michaelson, MD practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Ellen Michaelson, MD?
Quality data not reportedPrimary specialty
Hematology (Internal Medicine) Physician
Medicare Part D claims
493 29% vs specialty avg
Specialty distribution in Oregon
How Hematology (Internal Medicine) Physician 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 Hematology (Internal Medicine) Physician. 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).
Ellen Michaelson, MD appears in the CMS NPPES registry as a Hematology (Internal Medicine) Physician provider holding MD credentials at 2222 NW LOVEJOY ST STE 510, Portland, OR, 97210, with a listed phone of (503) 274-0045. NPI 1255364972 was issued on 07/08/2006.
Medicare Part D records for calendar year 2023 show 493 prescription claims written by this provider, covering 38 Medicare beneficiaries and totaling roughly $21K in drug spend, with an opioid prescribing rate of 9.1%.
Hematology (Internal Medicine) Physician is a narrow specialty nationwide, with 1,436 enrolled providers across 50 states and an average of 693 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 | 1255364972 |
|---|---|
| Specialty | Hematology (Internal Medicine) Physician |
| Credentials | MD |
| Gender | Female |
| NPI Issued | 07/08/2006 |
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
493
Total Claims
$21K
Total Drug Cost
38
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,118
- Total Day Supply
- 32,908
- Generic Drug Cost
- $13K
- Opioid Claims
- 45 (9.1% rate)
Patient Demographics
- Average Patient Age
- 73.8 years
- Avg HCC Risk Score
- 0.84
- Gender Split
- 63% female / 37% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Ellen Michaelson, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
44 claims
- Lisinopril
Lisinopril
37 claims
- Methadone Hcl
Methadone Hcl
29 claims
- Metformin Hcl
Metformin Hcl
24 claims
- Dextroamphetamine-… 17
Dextroamphetamine-Amphetamine
17 claims
- Hydrocodone-Acetam… 16
Hydrocodone-Acetaminophen
16 claims
- Amlodipine Besylate 14
Amlodipine Besylate
14 claims
- Gabapentin 14
Gabapentin
14 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 44 |
| Lisinopril | 37 |
| Methadone Hcl | 29 |
| Metformin Hcl | 24 |
| Dextroamphetamine-Amphetamine Dextroamphetamine/Amphetamine | 17 |
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 16 |
| Amlodipine Besylate | 14 |
| Gabapentin | 14 |
| Losartan Potassium | 13 |
| Mirtazapine | 13 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Hematology (Internal Medicine) Physician in OR →
All providers in Oregon →
Compare specialties →
Hematology (Internal Medicine) Physician Overview
How Ellen Michaelson, MD fits within the Hematology (Internal Medicine) Physician landscape nationally.
1,436
Hematology (Internal Medicine) Physician Providers in US
50
States with Hematology (Internal Medicine) Physician
693
Avg Claims per Provider
Ellen Michaelson, MD's 493 claims are below the specialty average of 693.
Nearby Hematology (Internal Medicine) Physician Providers in Oregon
Other clinicians with the same primary specialty enrolled in Oregon, drawn from the same CMS NPPES roster as Michaelson.
Dr. Grover Bagby
MD
Portland, OR
Dr. David Calverley
MD
Portland, OR
Dr. Rachel Cook
M.D.
Portland, OR
Dr. Kim-Hien Dao
DO, PHD
Salem, OR
Dr. Xinyu Fu
M.D.
Tualatin, OR
Compare Hematology (Internal Medicine) Physician 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 Hematology (Internal Medicine) Physician 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
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Understanding Medicare Claims Data
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How insurance networks affect your costs
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Frequently Asked Questions
What is Ellen Michaelson, MD's specialty? ▼
Ellen Michaelson, MD specializes in Hematology (Internal Medicine) Physician and practices in Portland, Oregon. Credentials: MD.
How much does Ellen Michaelson, MD prescribe under Medicare Part D? ▼
In 2023, Ellen Michaelson, MD wrote 493 Medicare Part D claims totaling $21K in drug costs for 38 beneficiaries.
Where is Ellen Michaelson, MD located? ▼
Ellen Michaelson, MD is located at 2222 NW LOVEJOY ST STE 510, Portland, OR, 97210. Phone: (503) 274-0045.
What is Ellen Michaelson, MD's NPI number? ▼
Ellen Michaelson, MD's National Provider Identifier (NPI) is 1255364972, issued on 07/08/2006.
Does Ellen Michaelson, MD prescribe opioids? ▼
Yes, Ellen Michaelson, MD had 45 opioid claims in 2023 with an opioid prescribing rate of 9.1%.
How many Hematology (Internal Medicine) Physician providers are there in the US? ▼
There are 1,436 Hematology (Internal Medicine) Physician providers across 50 states in the US. The average Hematology (Internal Medicine) Physician provider writes 693 Medicare Part D claims per year.
What drugs does Ellen Michaelson, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Ellen Michaelson, MD's most frequently prescribed drugs include Atorvastatin Calcium, Lisinopril, Methadone Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Ellen Michaelson, MD accept Medicare? ▼
Ellen Michaelson, MD appears in CMS Medicare data with 493 Part D claims and 38 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Ellen Michaelson, MD's credentials? ▼
Ellen Michaelson, MD's NPI is 1255364972 with credentials MD. 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.