NPI registry status
Active
2026 NPPES data Emergency Medicine Physician NPI 1326496118 M.D.
Verify on CMS → Alyssa Mierjeski, M.D.
Emergency Medicine Physician in Providence, Rhode Island.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 64,463 in Emergency 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
208
Medicare Part D claims · 166 beneficiaries · Emergency Medicine Physician avg: 352
MIPS score
75/100
CMS neutral threshold · no category scores published
What the federal data shows
Alyssa Mierjeski, M.D. carries the neutral CMS MIPS final score of 75/100, assigned where no category was scored - and filed 208 Medicare Part D claims in 2023.
- 75/100
- CMS neutral score · not measured
- 208
- Part D claims, 2023
- Likely
- board-certified (heuristic)
- ≥49th
- 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 Alyssa Mierjeski, M.D.
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 1326496118), first enumerated 06/02/2016.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 208 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
CMS quality reporting (MIPS)
CMS assigned a neutral MIPS final score of 75/100 where no performance category was scored — not a measured quality rank.
Source: CMS Quality Payment Program
- Reported
Board certification signal
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- 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 1326496118 · Emergency Medicine Physician
NPI-10 · ENUM-MID · TAX-MEGA · MIPS-NEUTRAL · RX-LIGHT · BOOK-THIN · PHOTO-ENUM
- NPI-10 1326496118
- ENUM-MID 2016
- TAX-MEGA 64K Emergency Medicine
- MIPS-NEUTRAL 75/100
- RX-LIGHT 208
- BOOK-THIN 350 in Rhode Island
- PHOTO-ENUM Michael Greene · 2016
Alyssa Mierjeski, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
208 ≥ 49th percentile 49% of 1,370,886 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 · 2023
✓
Board certification likely (heuristic, not verified)
Alyssa Mierjeski, M.D. 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 Alyssa Mierjeski, M.D.?
CMS neutral score, not measuredPrimary specialty
Emergency Medicine Physician
Medicare Part D claims
208 41% vs specialty avg
MIPS final score
75/100
Specialty distribution in Rhode Island
How Emergency Medicine Physician compares to other specialties among Rhode Island providers
MIPS score not measured
CMS assigned a neutral 75/100 threshold
CMS did not publish any Quality, Cost, Promoting Interoperability, or Improvement Activities category score for this clinician. This administrative threshold is not comparable with the national average of clinicians whose MIPS score was measured.
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 | 1326496118 |
|---|---|
| Specialty | Emergency Medicine Physician |
| Credentials | M.D. |
| Gender | Female |
| NPI Issued | 06/02/2016 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
75
Final Score
CMS neutral threshold · not measured
Reporting: Group practice
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
208
Total Claims
$3K
Total Drug Cost
166
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 210
- Total Day Supply
- 1,603
- Generic Drug Cost
- $2K
- Opioid Claims
- 38 (18.3% rate)
- Antibiotic Claims
- 83
Patient Demographics
- Average Patient Age
- 75.0 years
- Avg HCC Risk Score
- 1.54
- Gender Split
- 56% female / 44% male
- Age Distribution
- <65: 18, 65-74: 69, 75-84: 37, 85+: 42
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Alyssa Mierjeski, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Cefpodoxime Proxetil
Cefpodoxime Proxetil
24 claims
- Oxycodone-Acetamin…
Oxycodone-Acetaminophen
22 claims
- Ondansetron Odt
Ondansetron Odt
20 claims
- Cephalexin
Cephalexin
18 claims
- Prednisone
Prednisone
17 claims
- Doxycycline Hyclate
Doxycycline Hyclate
13 claims
- Oxycodone Hcl
Oxycodone Hcl
12 claims
| Drug | Claims |
|---|---|
| Cefpodoxime Proxetil | 24 |
| Oxycodone-Acetaminophen Oxycodone Hcl/Acetaminophen | 22 |
| Ondansetron Odt Ondansetron | 20 |
| Cephalexin | 18 |
| Prednisone | 17 |
| Doxycycline Hyclate | 13 |
| Oxycodone Hcl | 12 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Emergency Medicine Physician Overview
How Alyssa Mierjeski, M.D. fits within the Emergency Medicine Physician landscape nationally.
64,463
Emergency Medicine Physician Providers in US
56
States with Emergency Medicine Physician
352
Avg Claims per Provider
Alyssa Mierjeski, M.D.'s 208 claims are below the specialty average of 352.
Nationwide Emergency Medicine Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Mierjeski, both outside Rhode Island so the neighborhoods are not geographic containment.
Similar MIPS final score
Nearest same-specialty clinicians by CMS MIPS final score (75 here).
Same NPPES enumeration year (2016)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Emergency Medicine Physician Providers in Rhode Island
Other clinicians with the same primary specialty enrolled in Rhode Island, drawn from the same CMS NPPES roster as Mierjeski.
One of 350 Emergency Medicine Physician providers enrolled in Rhode Island, 5 are shown here.
Dr. Stephanie Aaron
DO
Warwick, RI
Dr. Fahad Ali
MD
Providence, RI
Dr. Katherine Allder
MD
Providence, RI
Dr. Amy Allen
MD
Providence, RI
Dr. Christopher Allison
MD
Providence, RI
Compare Emergency Medicine Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Alyssa Mierjeski, M.D.'s specialty? ▼
Alyssa Mierjeski, M.D. specializes in Emergency Medicine Physician and practices in Providence, Rhode Island. Credentials: M.D..
How much does Alyssa Mierjeski, M.D. prescribe under Medicare Part D? ▼
In 2023, Alyssa Mierjeski, M.D. wrote 208 Medicare Part D claims totaling $3K in drug costs for 166 beneficiaries.
What is Alyssa Mierjeski, M.D.'s Medicare quality score? ▼
Alyssa Mierjeski, M.D. has a CMS MIPS Final Score of 75/100. CMS published no Quality, Promoting Interoperability, Improvement Activity or Cost score for this clinician, so the final score is the neutral performance threshold CMS assigns rather than a measured result. The average MIPS Final Score across the 454,083 clinicians with at least one published category score is 83.5; clinicians whose score CMS assigned without scoring any category are excluded from that average. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Alyssa Mierjeski, M.D. located? ▼
Alyssa Mierjeski, M.D. is located at 593 EDDY ST, Providence, RI, 02903. Phone: (401) 444-4247.
What is Alyssa Mierjeski, M.D.'s NPI number? ▼
Alyssa Mierjeski, M.D.'s National Provider Identifier (NPI) is 1326496118, issued on 06/02/2016.
Does Alyssa Mierjeski, M.D. prescribe opioids? ▼
Yes, Alyssa Mierjeski, M.D. had 38 opioid claims in 2023 with an opioid prescribing rate of 18.3%.
How many Emergency Medicine Physician providers are there in the US? ▼
There are 64,463 Emergency Medicine Physician providers across 56 states in the US. The average Emergency Medicine Physician provider writes 352 Medicare Part D claims per year.
What drugs does Alyssa Mierjeski, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Alyssa Mierjeski, M.D.'s most frequently prescribed drugs include Cefpodoxime Proxetil, Oxycodone-Acetaminophen, Ondansetron Odt. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Alyssa Mierjeski, M.D. accept Medicare? ▼
Alyssa Mierjeski, M.D. appears in CMS Medicare data with 208 Part D claims and 166 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Alyssa Mierjeski, M.D.'s credentials? ▼
Alyssa Mierjeski, M.D.'s NPI is 1326496118 with credentials M.D.. 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
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.