NPI registry status
Active
2026 NPPES data Internal Medicine Physician NPI 1144726597 MD
Verify on CMS → Margret Zager, MD
Internal Medicine Physician in Tacoma, Washington.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 172,858 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
2K
Medicare Part D claims · 202 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
92%
generic claims · 7% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
93.1/100
▲ 10 pts above national avg 83.1 · Exceptional
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
Margret Zager, MD reported a CMS MIPS final score of 93.1/100 - above the 83.1 national average - and filed 1,910 Medicare Part D claims in 2023.
- 93.1/100
- MIPS score · +10 vs avg
- 2K
- Part D claims, 2023
- 92%
- 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.
Margret Zager, MD's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
93 Top 29% higher than 71% 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 Margret Zager, 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, Margret Zager, MD writes more Part D claims than 65% of them and scores higher on MIPS quality than 71% - placing this provider in the high-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 Margret Zager, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Margret Zager, 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 Margret Zager, MD?
High performer (top quartile)Primary specialty
Internal Medicine Physician
Medicare Part D claims
1,910 30% vs specialty avg
MIPS final score
93.1/100 10 pts vs avg
Specialty distribution in Washington
How Internal Medicine Physician compares to other specialties among Washington providers
Medicare quality performance, MIPS
Margret Zager, MD's 2023 MIPS final score plotted against the Internal Medicine Physician national average
- MIPS Final Score
- 93.1/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Internal Medicine Physician) - 93.1/100 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).
Margret Zager, MD appears in the CMS NPPES registry as a Internal Medicine Physician provider holding MD credentials at 1608 S J ST FL 3, Tacoma, WA, 98405, with a listed phone of (253) 274-7503. NPI 1144726597 was issued on 04/04/2018.
Medicare Part D records for calendar year 2023 show 1,910 prescription claims written by this provider, covering 202 Medicare beneficiaries and totaling roughly $144K in drug spend, split 7% brand-name and 92% generic by claim count, with an opioid prescribing rate of 2.4%. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 93.1/100 for the 2023 performance year (Quality 74), compared with the national average of 83.1.
Internal Medicine Physician is a high-volume specialty nationwide, with 172,858 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 | 1144726597 |
|---|---|
| Specialty | Internal Medicine Physician |
| Credentials | MD |
| Gender | Female |
| NPI Issued | 04/04/2018 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
93.0932
Final Score
Avg: 83.1
73.9573
Quality
100
Promoting Interoperability
Reporting: Alternative Payment Model
Hospital and facility affiliations
Facilities where Margret Zager, 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.
Franciscan Medical Group
Tacoma, WA
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
License & disciplinary context - Washington WMC 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~34K Washington medical licensees in 2023 - they are NOT specific to Margret Zager, MD. To verify Margret Zager, MD's current license status, search the WMC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
88
Total board actions, Washington 2023
Across 85 cases
2.59
Actions per 1,000 licensees
Washington statewide rate
probation
Most common action type
31 cases
WMC publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the Washington disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Generic-heavy
Margret Zager, MD - brand share 7.0%
Internal Medicine Physician average
7% brand-name claims vs 92% generic, on 1,910 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.
1,910
Total Claims
$144K
Total Drug Cost
202
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 3,998
- Total Day Supply
- 115,369
- Brand vs Generic
- 7% brand / 92% generic
- Brand Drug Cost
- $100K
- Generic Drug Cost
- $44K
- Opioid Claims
- 46 (2.4% rate)
- Antibiotic Claims
- 18
Patient Demographics
- Average Patient Age
- 67.7 years
- Avg HCC Risk Score
- 1.29
- Gender Split
- 71% female / 29% male
- Age Distribution
- <65: 44, 65-74: 102, 75-84: 41, 85+: 15
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Margret Zager, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
125 claims
- Amlodipine Besylate
Amlodipine Besylate
84 claims
- Levothyroxine Sodium
Levothyroxine Sodium
78 claims
- Lisinopril
Lisinopril
78 claims
- Losartan Potassium
Losartan Potassium
53 claims
- Methocarbamol 47
Methocarbamol
47 claims
- Omeprazole 44
Omeprazole
44 claims
- Citalopram Hbr 43
Citalopram Hbr
43 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 125 |
| Amlodipine Besylate | 84 |
| Levothyroxine Sodium | 78 |
| Lisinopril | 78 |
| Losartan Potassium | 53 |
| Methocarbamol | 47 |
| Omeprazole | 44 |
| Citalopram Hbr Citalopram Hydrobromide | 43 |
| Trazodone Hcl | 42 |
| Gabapentin | 40 |
* 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 Margret Zager, MD fits within the Internal Medicine Physician landscape nationally.
172,858
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,716
Avg Claims per Provider
Margret Zager, MD's 1,910 claims are below the specialty average of 2,716.
Nearby Internal Medicine Physician Providers in Washington
Other clinicians with the same primary specialty enrolled in Washington, drawn from the same CMS NPPES roster as Zager.
Dr. Sheida Aalami
M.D.
Seattle, WA
Dr. Barry Aaronson
MD
Seattle, WA
Gloria Abacan
Prosser, WA
Rebecca Abay
Seattle, WA
Syed Abbas
Tacoma, WA
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 Washington 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 Margret Zager, MD's specialty? ▼
Margret Zager, MD specializes in Internal Medicine Physician and practices in Tacoma, Washington. Credentials: MD.
How much does Margret Zager, MD prescribe under Medicare Part D? ▼
In 2023, Margret Zager, MD wrote 1,910 Medicare Part D claims totaling $144K in drug costs for 202 beneficiaries.
What is Margret Zager, MD's Medicare quality score? ▼
Margret Zager, MD has a CMS MIPS Final Score of 93.1/100 (Quality: 74). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Margret Zager, MD located? ▼
Margret Zager, MD is located at 1608 S J ST FL 3, Tacoma, WA, 98405. Phone: (253) 274-7503.
What is Margret Zager, MD's NPI number? ▼
Margret Zager, MD's National Provider Identifier (NPI) is 1144726597, issued on 04/04/2018.
Does Margret Zager, MD prescribe more brand-name or generic drugs? ▼
Margret Zager, MD's prescribing is 7% brand-name and 92% generic drugs by claim count, with $100K in brand drug costs.
Does Margret Zager, MD prescribe opioids? ▼
Yes, Margret Zager, MD had 46 opioid claims in 2023 with an opioid prescribing rate of 2.4%.
How many Internal Medicine Physician providers are there in the US? ▼
There are 172,858 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 Margret Zager, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Margret Zager, MD'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 Margret Zager, MD accept Medicare? ▼
Margret Zager, MD appears in CMS Medicare data with 1,910 Part D claims and 202 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Margret Zager, MD's credentials? ▼
Margret Zager, MD's NPI is 1144726597 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.