NPI registry status
Active
2026 NPPES data Critical Care Medicine Registered Nurse NPI 1942838578 FNP BC
Verify on CMS → May Martin, FNP BC
Critical Care Medicine Registered Nurse in Chicago, Illinois.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 6,553 in Critical Care Medicine Registered Nurse, 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
839
Medicare Part D claims · 108 beneficiaries · Critical Care Medicine Registered Nurse avg: 752
What the federal data shows
May Martin, FNP BC filed 839 Medicare Part D claims in 2023 as a Critical Care Medicine Registered Nurse in Chicago, Illinois.
- 839
- Part D claims, 2023
- ≥73rd
- 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.
CMS NPPES provider registry desk
NPI 1942838578 · Critical Care Medicine Registered Nurse
NPI-10 · ENUM-RECENT · TAX-MID · RX-LIGHT · BOOK-THIN · PHOTO-ENUM
- NPI-10 1942838578
- ENUM-RECENT 2020
- TAX-MID 7K Critical Care
- RX-LIGHT 839
- BOOK-THIN 226 in Illinois
- PHOTO-ENUM Erik Castellano · 2020
May Martin, FNP BC's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
839 ≥ 73rd percentile 73% 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
What does the federal data show about May Martin, FNP BC?
Quality data not reportedPrimary specialty
Critical Care Medicine Registered Nurse
Medicare Part D claims
839 12% vs specialty avg
Specialty distribution in Illinois
How Critical Care Medicine Registered Nurse compares to other specialties among Illinois providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Critical Care Medicine Registered Nurse. Verify directly:
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 | 1942838578 |
|---|---|
| Specialty | Critical Care Medicine Registered Nurse |
| Credentials | FNP BC |
| Gender | Female |
| NPI Issued | 03/30/2020 |
License & disciplinary context - Illinois IDFPR 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 ~42K Illinois medical licensees in 2023 - they are NOT specific to May Martin, FNP BC. To verify May Martin, FNP BC's current license status, search the IDFPR public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
106
Total board actions, Illinois 2023
Across 103 cases
2.52
Actions per 1,000 licensees
Illinois statewide rate
probation
Most common action type
38 cases
IDFPR 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 Illinois disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
839
Total Claims
$61K
Total Drug Cost
108
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 840
- Total Day Supply
- 15,780
- Generic Drug Cost
- $17K
- Opioid Claims
- 29 (3.5% rate)
- Antibiotic Claims
- 36
Patient Demographics
- Average Patient Age
- 72.2 years
- Avg HCC Risk Score
- 2.99
- Gender Split
- 52% female / 48% male
- Age Distribution
- <65: 21, 65-74: 37, 75-84: 37, 85+: 13
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What May Martin, FNP BC prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
49 claims
- Donepezil Hcl
Donepezil Hcl
35 claims
- Metoprolol Tartrate
Metoprolol Tartrate
28 claims
- Potassium Chloride
Potassium Chloride
27 claims
- Lorazepam
Lorazepam
26 claims
- Lisinopril
Lisinopril
20 claims
- Veltassa
Veltassa
20 claims
- Hydrocodone-Acetam… 19
Hydrocodone-Acetaminophen
19 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 49 |
| Donepezil Hcl | 35 |
| Metoprolol Tartrate | 28 |
| Potassium Chloride | 27 |
| Lorazepam | 26 |
| Lisinopril | 20 |
| Veltassa Patiromer Calcium Sorbitex | 20 |
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 19 |
| Nystatin | 19 |
| Risperidone | 17 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Critical Care Medicine Registered Nurse in IL →
All providers in Illinois →
Compare specialties →
Critical Care Medicine Registered Nurse Overview
How May Martin, FNP BC fits within the Critical Care Medicine Registered Nurse landscape nationally.
6,553
Critical Care Medicine Registered Nurse Providers in US
53
States with Critical Care Medicine Registered Nurse
752
Avg Claims per Provider
May Martin, FNP BC's 839 claims are above the specialty average of 752.
Nationwide Critical Care Medicine Registered Nurse peers with similar MIPS or enrollment year
Two federal-record peer sets for Martin, both outside Illinois so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2020)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Critical Care Medicine Registered Nurse Providers in Illinois
Other clinicians with the same primary specialty enrolled in Illinois, drawn from the same CMS NPPES roster as Martin.
One of 226 Critical Care Medicine Registered Nurse providers enrolled in Illinois, 5 are shown here.
Senah Abu-Samra
North Chicago, IL
Dr. Nikaya Acfalle
RN
Chicago, IL
Dr. Abigail Alexander
APRN, CRNA
Geneva, IL
Jenna Alfeldt
Waterloo, IL
Dr. Mansi Almaraz
DNP, APRN, AGACNP-BC
Chicago, IL
Compare Critical Care Medicine Registered Nurse nationally: see state-by-state distribution →
Frequently Asked Questions
What is May Martin, FNP BC's specialty? ▼
May Martin, FNP BC specializes in Critical Care Medicine Registered Nurse and practices in Chicago, Illinois. Credentials: FNP BC.
How much does May Martin, FNP BC prescribe under Medicare Part D? ▼
In 2023, May Martin, FNP BC wrote 839 Medicare Part D claims totaling $61K in drug costs for 108 beneficiaries.
Where is May Martin, FNP BC located? ▼
May Martin, FNP BC is located at 5901 N CICERO AVE STE 600, Chicago, IL, 60646. Phone: (773) 545-9200.
What is May Martin, FNP BC's NPI number? ▼
May Martin, FNP BC's National Provider Identifier (NPI) is 1942838578, issued on 03/30/2020.
Does May Martin, FNP BC prescribe opioids? ▼
Yes, May Martin, FNP BC had 29 opioid claims in 2023 with an opioid prescribing rate of 3.5%.
How many Critical Care Medicine Registered Nurse providers are there in the US? ▼
There are 6,553 Critical Care Medicine Registered Nurse providers across 53 states in the US. The average Critical Care Medicine Registered Nurse provider writes 752 Medicare Part D claims per year.
What drugs does May Martin, FNP BC prescribe most often? ▼
Based on 2023 Medicare Part D data, May Martin, FNP BC's most frequently prescribed drugs include Atorvastatin Calcium, Donepezil Hcl, Metoprolol Tartrate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does May Martin, FNP BC accept Medicare? ▼
May Martin, FNP BC appears in CMS Medicare data with 839 Part D claims and 108 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify May Martin, FNP BC's credentials? ▼
May Martin, FNP BC's NPI is 1942838578 with credentials FNP BC. 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.
- 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.