NPI registry status
Active
2026 NPPES data Nephrology Physician NPI 1194780114 MD
Verify on CMS → Andrzej Maciejewski, MD
Nephrology Physician in Anchorage, Alaska.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 10,534 in Nephrology 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
7K
Medicare Part D claims · 360 beneficiaries · Nephrology Physician avg: 1K
Generic prescribing
73%
generic claims · 24% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
65.5/100
▼ 18 pts below national avg 83.1 · Mid-tier
Industry payments
$8.7K
111 payments · CMS Open Payments (Sunshine Act)
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
Andrzej Maciejewski, MD reported a CMS MIPS final score of 65.5/100 - below the 83.1 national average - and filed 6,925 Medicare Part D claims in 2023.
- 65.5/100
- MIPS score · -18 vs avg
- 7K
- Part D claims, 2023
- 73%
- 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.
Andrzej Maciejewski, MD's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
66 7th percentile higher than 7% 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 Andrzej Maciejewski, MD sits
This provider among nephrology physician peers
Across the 2,476 nephrology physician providers who report both Medicare Part D prescribing and a MIPS quality score, Andrzej Maciejewski, MD writes more Part D claims than 97% of them and scores higher on MIPS quality than 17% - placing this provider in the high-volume, lower-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 nephrology physician peer from a representative sample of 60; the gold marker is Andrzej Maciejewski, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Andrzej Maciejewski, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting - 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 Andrzej Maciejewski, MD?
Below national averagePrimary specialty
Nephrology Physician
Medicare Part D claims
6,925 376% vs specialty avg
MIPS final score
65.5/100 17.6 pts vs avg
Specialty distribution in Alaska
How Nephrology Physician compares to other specialties among Alaska providers
Medicare quality performance, MIPS
Andrzej Maciejewski, MD's 2023 MIPS final score plotted against the Nephrology Physician national average
- MIPS Final Score
- 65.5/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Nephrology Physician) - 65.5/100 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).
Andrzej Maciejewski, MD appears in the CMS NPPES registry as a Nephrology Physician provider holding MD credentials at 3300 PROVIDENCE DR STE 309, Anchorage, AK, 99508, with a listed phone of (907) 222-1714. NPI 1194780114 was issued on 04/20/2006.
Medicare Part D records for calendar year 2023 show 6,925 prescription claims written by this provider, covering 360 Medicare beneficiaries and totaling roughly $2.6 million in drug spend, split 24% brand-name and 73% generic by claim count, with an opioid prescribing rate of 2.9%. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 65.5/100 for the 2023 performance year (Quality 74.8, Cost 10), compared with the national average of 83.1.
Nephrology Physician is a mid-sized specialty nationwide, with 10,534 enrolled providers across 55 states and an average of 1,454 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 | 1194780114 |
|---|---|
| Specialty | Nephrology Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 04/20/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
65.4504
Final Score
Avg: 83.1
74.8346
Quality
10
Cost
100
Promoting Interoperability
Reporting: Group practice
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Andrzej Maciejewski, MD. Source: openpaymentsdata.cms.gov.
Total received
$8.7K
Largest payer
Amgen Inc.
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
Brand vs generic prescribing mix · Typical
Andrzej Maciejewski, MD - brand share 24.0%
Nephrology Physician average
24% brand-name claims vs 73% generic, on 6,925 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.
6,925
Total Claims
$2.6M
Total Drug Cost
360
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 15,200
- Total Day Supply
- 434,686
- Brand vs Generic
- 24% brand / 73% generic
- Brand Drug Cost
- $2.4M
- Generic Drug Cost
- $181K
- Opioid Claims
- 204 (2.9% rate)
- Antibiotic Claims
- 116
Patient Demographics
- Average Patient Age
- 73.0 years
- Avg HCC Risk Score
- 1.43
- Gender Split
- 51% female / 49% male
- Age Distribution
- <65: 41, 65-74: 154, 75-84: 132, 85+: 33
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Andrzej Maciejewski, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Allopurinol
Allopurinol
384 claims
- Atorvastatin Calcium
Atorvastatin Calcium
349 claims
- Losartan Potassium
Losartan Potassium
221 claims
- Farxiga
Farxiga
183 claims
- Amlodipine Besylate
Amlodipine Besylate
181 claims
- Metformin Hcl 149
Metformin Hcl
149 claims
- Metoprolol Succinate 148
Metoprolol Succinate
148 claims
- Gabapentin 138
Gabapentin
138 claims
| Drug | Claims |
|---|---|
| Allopurinol | 384 |
| Atorvastatin Calcium | 349 |
| Losartan Potassium | 221 |
| Farxiga Dapagliflozin Propanediol | 183 |
| Amlodipine Besylate | 181 |
| Metformin Hcl | 149 |
| Metoprolol Succinate | 148 |
| Gabapentin | 138 |
| Jardiance Empagliflozin | 120 |
| Levothyroxine Sodium | 118 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Nephrology Physician Overview
How Andrzej Maciejewski, MD fits within the Nephrology Physician landscape nationally.
10,534
Nephrology Physician Providers in US
55
States with Nephrology Physician
1,454
Avg Claims per Provider
Andrzej Maciejewski, MD's 6,925 claims are above the specialty average of 1,454.
Nearby Nephrology Physician Providers in Alaska
Other clinicians with the same primary specialty enrolled in Alaska, drawn from the same CMS NPPES roster as Maciejewski.
Dr. Rahul Abraham
MD
Anchorage, AK
Dr. Shuang Ying Bao
M.D.
Anchorage, AK
Eduardo Cadore Guzzo
Anchorage, AK
Dr. Stefano Emili
MD
Anchorage, AK
Dr. Jeremy Gitomer
M.D.
Anchorage, AK
Compare Nephrology 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 Alaska medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Nephrology 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 Andrzej Maciejewski, MD's specialty? ▼
Andrzej Maciejewski, MD specializes in Nephrology Physician and practices in Anchorage, Alaska. Credentials: MD.
How much does Andrzej Maciejewski, MD prescribe under Medicare Part D? ▼
In 2023, Andrzej Maciejewski, MD wrote 6,925 Medicare Part D claims totaling $2.6M in drug costs for 360 beneficiaries.
What is Andrzej Maciejewski, MD's Medicare quality score? ▼
Andrzej Maciejewski, MD has a CMS MIPS Final Score of 65.5/100 (Quality: 74.8, Cost: 10). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Andrzej Maciejewski, MD located? ▼
Andrzej Maciejewski, MD is located at 3300 PROVIDENCE DR STE 309, Anchorage, AK, 99508. Phone: (907) 222-1714.
What is Andrzej Maciejewski, MD's NPI number? ▼
Andrzej Maciejewski, MD's National Provider Identifier (NPI) is 1194780114, issued on 04/20/2006.
Does Andrzej Maciejewski, MD prescribe more brand-name or generic drugs? ▼
Andrzej Maciejewski, MD's prescribing is 24% brand-name and 73% generic drugs by claim count, with $2.4M in brand drug costs.
Does Andrzej Maciejewski, MD prescribe opioids? ▼
Yes, Andrzej Maciejewski, MD had 204 opioid claims in 2023 with an opioid prescribing rate of 2.9%.
How many Nephrology Physician providers are there in the US? ▼
There are 10,534 Nephrology Physician providers across 55 states in the US. The average Nephrology Physician provider writes 1,454 Medicare Part D claims per year.
What drugs does Andrzej Maciejewski, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Andrzej Maciejewski, MD's most frequently prescribed drugs include Allopurinol, Atorvastatin Calcium, Losartan Potassium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Andrzej Maciejewski, MD accept Medicare? ▼
Andrzej Maciejewski, MD appears in CMS Medicare data with 6,925 Part D claims and 360 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Andrzej Maciejewski, MD's credentials? ▼
Andrzej Maciejewski, MD's NPI is 1194780114 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.