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 1,483 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
454
Medicare Part D claims · 32 beneficiaries · Hematology (Internal Medicine) Physician avg: 684
Generic prescribing
93%
generic claims · 7% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Ellen Michaelson, MD filed 454 Medicare Part D claims in 2024 as a Hematology (Internal Medicine) Physician in Portland, Oregon, prescribing 93% generic.
- 454
- Part D claims, 2024
- 93%
- generic prescribing
- ≥61st
- pct by Part D claim volume (lower-bound band)
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.
Federal trust snapshot
What official records show about Ellen Michaelson, MD
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1255364972), first enumerated 07/08/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 454 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Practices in an ABMS-board-eligible specialty; board certification not confirmed in federal records.
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1255364972 · Hematology (Internal Medicine) Physician
NPI-10 · ENUM-LEGACY · TAX-NARROW · RX-LIGHT · BOOK-THIN · PHOTO-ENUM
- NPI-10 1255364972
- ENUM-LEGACY 2006
- TAX-NARROW 1,483
- RX-LIGHT 454
- BOOK-THIN 19 in Oregon
- PHOTO-ENUM Gary Goodman, MD · 2006
Ellen Michaelson, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
454 ≥ 61st percentile 61% of 1,416,883 prescribers are in lower value bands
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.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2024
◑
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
454 34% 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).
Practice Address
Provider Details
| NPI | 1255364972 |
|---|---|
| Specialty | Hematology (Internal Medicine) Physician |
| Credentials | MD |
| Gender | Female |
| NPI Issued | 07/08/2006 |
Brand vs generic prescribing mix · Generic-heavy
Ellen Michaelson, MD - brand share 7.0%
Hematology (Internal Medicine) Physician average
7% brand-name claims vs 93% generic, on 454 2024 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 2024.
454
Total Claims
$23K
Total Drug Cost
32
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,048.967
- Total Day Supply
- 30,970
- Brand vs Generic
- 7% brand / 93% generic
- Brand Drug Cost
- $12K
- Generic Drug Cost
- $10K
- Opioid Claims
- 54 (11.9% rate)
Patient Demographics
- Average Patient Age
- 74.8 years
- Avg HCC Risk Score
- 0.82
- Gender Split
- 63% female / 38% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Ellen Michaelson, MD prescribes most
Top Medicare Part D drugs by claim count, 2024
- Atorvastatin Calcium
Atorvastatin Calcium
40 claims
- Lisinopril
Lisinopril
31 claims
- Methadone Hcl
Methadone Hcl
30 claims
- Hydrocodone-Acetam…
Hydrocodone-Acetaminophen
23 claims
- Dextroamphetamine-…
Dextroamphetamine-Amphetamine
20 claims
- Metformin Hcl
Metformin Hcl
20 claims
- Losartan Potassium
Losartan Potassium
16 claims
- Venlafaxine Hcl Er 15
Venlafaxine Hcl Er
15 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 40 |
| Lisinopril | 31 |
| Methadone Hcl | 30 |
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 23 |
| Dextroamphetamine-Amphetamine Dextroamphetamine/Amphetamine | 20 |
| Metformin Hcl | 20 |
| Losartan Potassium | 16 |
| Venlafaxine Hcl Er Venlafaxine Hcl | 15 |
| Omeprazole | 14 |
| Albuterol Sulfate Hfa Albuterol Sulfate | 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.
1,483
Hematology (Internal Medicine) Physician Providers in US
50
States with Hematology (Internal Medicine) Physician
684
Avg Claims per Provider
Ellen Michaelson, MD's 454 claims are below the specialty average of 684.
Nationwide Hematology (Internal Medicine) Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Michaelson, both outside Oregon so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
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.
One of 19 Hematology (Internal Medicine) Physician providers enrolled in Oregon, 5 are shown here.
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 →
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 2024, Ellen Michaelson, MD wrote 454 Medicare Part D claims totaling $23K in drug costs for 32 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 more brand-name or generic drugs? ▼
Ellen Michaelson, MD's prescribing is 7% brand-name and 93% generic drugs by claim count, with $12K in brand drug costs.
Does Ellen Michaelson, MD prescribe opioids? ▼
Yes, Ellen Michaelson, MD had 54 opioid claims in 2024 with an opioid prescribing rate of 11.9%.
How many Hematology (Internal Medicine) Physician providers are there in the US? ▼
There are 1,483 Hematology (Internal Medicine) Physician providers across 50 states in the US. The average Hematology (Internal Medicine) Physician provider writes 684 Medicare Part D claims per year.
What drugs does Ellen Michaelson, MD prescribe most often? ▼
Based on 2024 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 454 Part D claims and 32 Medicare beneficiaries in 2024. 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 (2024). 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 August 2026 (NPPES) / 2024 (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
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 August 2026.