2026 NPPES data Rheumatology Physician NPI 1639632581 MD
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ELIZABETH ANDERSON, MD

Rheumatology Physician in PORTLAND, Oregon. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
116
Medicare Part D claims · 50 beneficiaries · Rheumatology Physician avg: 2K
MIPS score
97.83/100
▲ 15 pts above national avg 83.1 · [object Object]

What the federal data shows

ELIZABETH ANDERSON, MD reported a CMS MIPS final score of 97.83/100 — above the 83.1 national average — and filed 116 Medicare Part D claims in 2023.

97.83/100
MIPS score · +15 vs avg
116
Part D claims, 2023
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.

ELIZABETH ANDERSON, MD's MIPS score vs every scored U.S. clinician

CMS Merit-based Incentive Payment System (MIPS) final score, 2023 — the federal quality measure

98 Top 15% higher than 85% of 477,587 scored providers

0–10: 8,684 scored providers (2%). Below this entry. 10–20: 3,008 scored providers (1%). Below this entry. 20–30: 3,069 scored providers (1%). Below this entry. 30–40: 2,746 scored providers (1%). Below this entry. 40–50: 2,928 scored providers (1%). Below this entry. 50–60: 5,882 scored providers (1%). Below this entry. 60–70: 13,906 scored providers (3%). Below this entry. 70–80: 118,074 scored providers (25%). Below this entry. 80–90: 129,887 scored providers (27%). Below this entry. 90–100: 189,403 scored providers (40%). This entry sits in this band. This provider 0 100 every MIPS-scored clinician, bucketed by value

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

Board certification likely (heuristic — not verified)

ELIZABETH ANDERSON, 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 ELIZABETH ANDERSON, MD?

High performer (top quartile)

NPI registry status

Active

Issued 04/08/2019

NPI 1639632581

Primary specialty

Rheumatology Physician

Mid-sized

6,181 US NPIs in this specialty

Medicare Part D claims

116 94% vs specialty avg

2023 prescription claims

Specialty avg: 2,054

MIPS final score

97.83/100 14.730000000000004% pts

Exceptional band

vs 83.1 national avg

Specialty distribution in Oregon

How Rheumatology Physician compares to other specialties among Oregon providers

Oregon providers

Rheumatology Physician share within Oregon

1. Rheumatology Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Rheumatology Physician share within Oregon

Medicare quality performance — MIPS

ELIZABETH ANDERSON, MD's 2023 MIPS final score plotted against the Rheumatology Physician national average

High performer (top quartile)
MIPS Final Score
97.83/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Rheumatology Physician) — 97.83/100 vs national avg 83.1

0%100%National avg83%97.8%
MIPS final score (Rheumatology Physician) — 97.83/100 vs national avg 83.1

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).

ELIZABETH ANDERSON, MD appears in the CMS NPPES registry as a Rheumatology Physician provider holding MD credentials at 3181 SW SAM JACKSON PARK RD, PORTLAND, OR, 97239, with a listed phone of (503) 494-8211. NPI 1639632581 was issued on 04/08/2019. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what ANDERSON most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 116 prescription claims written by this provider, covering 50 Medicare beneficiaries and totaling roughly $162K in drug spend. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 97.83/100 for the 2023 performance year (Quality 80.9759), compared with the national average of 83.1.

Rheumatology Physician is a mid-sized specialty nationwide, with 6,181 enrolled providers across 52 states and an average of 2,054 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

3181 SW SAM JACKSON PARK RD
PORTLAND, OR 97239

Provider Details

NPI 1639632581
Specialty Rheumatology Physician
Credentials MD
Gender Female
NPI Issued 04/08/2019

CMS Quality Score (MIPS)

Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.

97.83
Final Score
Avg: 83.1
80.9759
Quality
100
Promoting Interoperability

Reporting: Alternative Payment Model

Hospital and facility affiliations

Facilities where ELIZABETH ANDERSON, 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.

UNIVERSITY PROFESSIONAL SERVICES
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).

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

116
Total Claims
$162K
Total Drug Cost
50
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
218
Total Day Supply
6,384
Generic Drug Cost
$3K

Patient Demographics

Average Patient Age
67.0 years
Avg HCC Risk Score
1.85
Gender Split
64% female / 36% male
Age Distribution
<65: 15, 65-74: 17, 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.

Drug Claims
Methotrexate
Methotrexate Sodium
24
Prednisone
16

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Rheumatology Physician Overview

How ELIZABETH ANDERSON, MD fits within the Rheumatology Physician landscape nationally.

6,181
Rheumatology Physician Providers in US
52
States with Rheumatology Physician
2,054
Avg Claims per Provider

ELIZABETH ANDERSON, MD's 116 claims are below the specialty average of 2,054.

Nearby Rheumatology Physician Providers in Oregon

Other clinicians with the same primary specialty enrolled in Oregon, drawn from the same CMS NPPES roster as ANDERSON.

Compare Rheumatology Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is ELIZABETH ANDERSON, MD's specialty?
ELIZABETH ANDERSON, MD specializes in Rheumatology Physician and practices in PORTLAND, Oregon. Credentials: MD.
How much does ELIZABETH ANDERSON, MD prescribe under Medicare Part D?
In 2023, ELIZABETH ANDERSON, MD wrote 116 Medicare Part D claims totaling $162K in drug costs for 50 beneficiaries.
What is ELIZABETH ANDERSON, MD's Medicare quality score?
ELIZABETH ANDERSON, MD has a CMS MIPS Final Score of 97.83/100 (Quality: 80.9759). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is ELIZABETH ANDERSON, MD located?
ELIZABETH ANDERSON, MD is located at 3181 SW SAM JACKSON PARK RD, PORTLAND, OR, 97239. Phone: (503) 494-8211.
What is ELIZABETH ANDERSON, MD's NPI number?
ELIZABETH ANDERSON, MD's National Provider Identifier (NPI) is 1639632581, issued on 04/08/2019.
How many Rheumatology Physician providers are there in the US?
There are 6,181 Rheumatology Physician providers across 52 states in the US. The average Rheumatology Physician provider writes 2,054 Medicare Part D claims per year.
What drugs does ELIZABETH ANDERSON, MD prescribe most often?
Based on 2023 Medicare Part D data, ELIZABETH ANDERSON, MD's most frequently prescribed drugs include Methotrexate, Prednisone. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does ELIZABETH ANDERSON, MD accept Medicare?
ELIZABETH ANDERSON, MD appears in CMS Medicare data with 116 Part D claims and 50 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify ELIZABETH ANDERSON, MD's credentials?
ELIZABETH ANDERSON, MD's NPI is 1639632581 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

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