NPI registry status
Active
2026 NPPES data Internal Medicine Physician NPI 1669815791 MD
Verify on CMS → Heather Fox, MD
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 172,737 in 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
164
Medicare Part D claims · 37 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
66%
generic claims · 34% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
86/100
▲ 3 pts above national avg 83.1 · Above neutral
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
Heather Fox, MD reported a CMS MIPS final score of 86/100 - above the 83.1 national average - and filed 164 Medicare Part D claims in 2023.
- 86/100
- MIPS score · +3 vs avg
- 164
- Part D claims, 2023
- 66%
- generic prescribing
- Likely
- board-certified (heuristic)
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.
Heather Fox, MD's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
86 Top 48% higher than 52% of 477,587 scored providers
Each bar is a band; taller bars hold more scored providers. 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 Merit-based Incentive Payment System (MIPS) · 2023
Where Heather Fox, MD sits
This provider among internal medicine physician peers
Across the 36,260 internal medicine physician providers who report both Medicare Part D prescribing and a MIPS quality score, Heather Fox, MD writes more Part D claims than 20% of them and scores higher on MIPS quality than 50% - placing this provider in the lower-volume, high-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Part D claim volume vs MIPS quality, by specialty percentile
Each dot is one internal medicine physician peer from a representative sample of 60; the gold marker is Heather Fox, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Heather Fox, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 1 hospital affiliation - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Heather Fox, MD?
High performer (top quartile)Primary specialty
Internal Medicine Physician
Medicare Part D claims
164 94% vs specialty avg
MIPS final score
86/100 2.9 pts vs avg
Specialty distribution in Oregon
How Internal Medicine Physician compares to other specialties among Oregon providers
Medicare quality performance, MIPS
Heather Fox, MD's 2023 MIPS final score plotted against the Internal Medicine Physician national average
- MIPS Final Score
- 86/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Internal Medicine Physician) - 86/100 vs national avg 83.1
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).
Heather Fox, MD appears in the CMS NPPES registry as an Internal Medicine Physician provider holding MD credentials at 1015 NW 22ND AVE, Portland, OR, 97210, with a listed phone of (503) 413-7711. NPI 1669815791 was issued on 04/08/2013.
Medicare Part D records for calendar year 2023 show 164 prescription claims written by this provider, covering 37 Medicare beneficiaries and totaling roughly $12K in drug spend, split 34% brand-name and 66% generic by claim count. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 86/100 for the 2023 performance year (Quality 77.8, Cost 74.2), compared with the national average of 83.1.
Internal Medicine Physician is a high-volume specialty nationwide, with 172,737 enrolled providers across 56 states and an average of 2,716 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 | 1669815791 |
|---|---|
| Specialty | Internal Medicine Physician |
| Credentials | MD |
| Gender | Female |
| NPI Issued | 04/08/2013 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
86.0353
Final Score
Avg: 83.1
77.8032
Quality
74.1514
Cost
99
Promoting Interoperability
Reporting: Group practice
Hospital and facility affiliations
Facilities where Heather Fox, MD 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.
Legacy Clinics LLC
Portland, 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).
Brand vs generic prescribing mix · Above average
Heather Fox, MD - brand share 34.0%
Internal Medicine Physician average
34% brand-name claims vs 66% generic, on 164 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.
164
Total Claims
$12K
Total Drug Cost
37
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 169
- Total Day Supply
- 3,710
- Brand vs Generic
- 34% brand / 66% generic
- Brand Drug Cost
- $11K
- Generic Drug Cost
- $1K
Patient Demographics
- Average Patient Age
- 74.6 years
- Avg HCC Risk Score
- 2.30
- Gender Split
- 51% female / 49% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Heather Fox, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Levothyroxine Sodium
Levothyroxine Sodium
23 claims
- Eliquis
Eliquis
21 claims
- Furosemide
Furosemide
13 claims
- Clopidogrel
Clopidogrel
11 claims
| Drug | Claims |
|---|---|
| Levothyroxine Sodium | 23 |
| Eliquis Apixaban | 21 |
| Furosemide | 13 |
| Clopidogrel Clopidogrel Bisulfate | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Internal Medicine Physician Overview
How Heather Fox, MD fits within the Internal Medicine Physician landscape nationally.
172,737
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,716
Avg Claims per Provider
Heather Fox, MD's 164 claims are below the specialty average of 2,716.
Nearby Internal Medicine Physician Providers in Oregon
Other clinicians with the same primary specialty enrolled in Oregon, drawn from the same CMS NPPES roster as Fox.
Dr. Charmaine Clarisse Abalos
M.D.
Medford, OR
Dr. Soraya Abbassian
M.D.
Portland, OR
Dr. Nicholas Abbott
M.D.
Tualatin, OR
Dr. Mohamed Abdel Khalek
M.D
Roseburg, OR
Dr. Amged Abdelaziz
MD
Portland, OR
Compare 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 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.
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Frequently Asked Questions
What is Heather Fox, MD's specialty? ▼
Heather Fox, MD specializes in Internal Medicine Physician and practices in Portland, Oregon. Credentials: MD.
How much does Heather Fox, MD prescribe under Medicare Part D? ▼
In 2023, Heather Fox, MD wrote 164 Medicare Part D claims totaling $12K in drug costs for 37 beneficiaries.
What is Heather Fox, MD's Medicare quality score? ▼
Heather Fox, MD has a CMS MIPS Final Score of 86/100 (Quality: 77.8, Cost: 74.2). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Heather Fox, MD located? ▼
Heather Fox, MD is located at 1015 NW 22ND AVE, Portland, OR, 97210. Phone: (503) 413-7711.
What is Heather Fox, MD's NPI number? ▼
Heather Fox, MD's National Provider Identifier (NPI) is 1669815791, issued on 04/08/2013.
Does Heather Fox, MD prescribe more brand-name or generic drugs? ▼
Heather Fox, MD's prescribing is 34% brand-name and 66% generic drugs by claim count, with $11K in brand drug costs.
How many Internal Medicine Physician providers are there in the US? ▼
There are 172,737 Internal Medicine Physician providers across 56 states in the US. The average Internal Medicine Physician provider writes 2,716 Medicare Part D claims per year.
What drugs does Heather Fox, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Heather Fox, MD's most frequently prescribed drugs include Levothyroxine Sodium, Eliquis, Furosemide. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Heather Fox, MD accept Medicare? ▼
Heather Fox, MD appears in CMS Medicare data with 164 Part D claims and 37 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Heather Fox, MD's credentials? ▼
Heather Fox, MD's NPI is 1669815791 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.
- Quality Performance
- CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
- 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.