NPI registry status
Active
2026 NPPES data Nurse Practitioner NPI 1194150862 NP
Verify on CMS → Melissa Armstrong, NP
Nurse Practitioner in Sterling, 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 87,227 in Nurse Practitioner, 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
4K
Medicare Part D claims · 273 beneficiaries · Nurse Practitioner avg: 1K
Generic prescribing
89%
generic claims · 10% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$117.21
6 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
Melissa Armstrong, NP filed 4,175 Medicare Part D claims in 2023 as a Nurse Practitioner in Sterling, Illinois, prescribing 89% generic.
- 4K
- Part D claims, 2023
- 89%
- generic prescribing
- $117.21
- industry payments (Sunshine Act)
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.
Melissa Armstrong, NP's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
4,175 Top 8% higher than 92% of 1,370,886 prescribers
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.
Source CMS Medicare Part D Prescriber Public Use File · 2023
What does the federal data show about Melissa Armstrong, NP?
Quality data not reportedPrimary specialty
Nurse Practitioner
Medicare Part D claims
4,175 285% vs specialty avg
Specialty distribution in Illinois
How Nurse Practitioner 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 Nurse Practitioner. 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).
Melissa Armstrong, NP appears in the CMS NPPES registry as a Nurse Practitioner provider holding NP credentials at 101 E MILLER RD, Sterling, IL, 61081, with a listed phone of (815) 625-4790. NPI 1194150862 was issued on 09/12/2013.
Medicare Part D records for calendar year 2023 show 4,175 prescription claims written by this provider, covering 273 Medicare beneficiaries and totaling roughly $291K in drug spend, split 10% brand-name and 89% generic by claim count, with an opioid prescribing rate of 4.6%.
Nurse Practitioner is a high-volume specialty nationwide, with 87,227 enrolled providers across 56 states and an average of 1,084 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 | 1194150862 |
|---|---|
| Specialty | Nurse Practitioner |
| Credentials | NP |
| Gender | Female |
| NPI Issued | 09/12/2013 |
Hospital and facility affiliations
Facilities where Melissa Armstrong, NP 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.
Cgh Medical Center
★☆☆☆☆ 1/5
Sterling, IL
Acute Care Hospitals
CMS CCN: 140043
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
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 Melissa Armstrong, NP. Source: openpaymentsdata.cms.gov.
Total received
$117
Largest payer
AstraZeneca Pharmaceuticals LP
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.
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 Melissa Armstrong, NP. To verify Melissa Armstrong, NP'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.
Brand vs generic prescribing mix · Typical
Melissa Armstrong, NP - brand share 10.0%
Nurse Practitioner average
10% brand-name claims vs 89% generic, on 4,175 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.
4,175
Total Claims
$291K
Total Drug Cost
273
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 9,047
- Total Day Supply
- 261,539
- Brand vs Generic
- 10% brand / 89% generic
- Brand Drug Cost
- $227K
- Generic Drug Cost
- $63K
- Opioid Claims
- 193 (4.6% rate)
- Antibiotic Claims
- 140
Patient Demographics
- Average Patient Age
- 73.8 years
- Avg HCC Risk Score
- 0.97
- Gender Split
- 56% female / 44% male
- Age Distribution
- <65: 25, 65-74: 136, 75-84: 68, 85+: 44
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Melissa Armstrong, NP prescribes most
Top Medicare Part D drugs by claim count, 2023
- Lisinopril
Lisinopril
199 claims
- Atorvastatin Calcium
Atorvastatin Calcium
197 claims
- Levothyroxine Sodium
Levothyroxine Sodium
155 claims
- Hydrochlorothiazide
Hydrochlorothiazide
127 claims
- Lorazepam
Lorazepam
124 claims
- Losartan Potassium
Losartan Potassium
120 claims
- Metoprolol Tartrate
Metoprolol Tartrate
109 claims
- Rosuvastatin Calcium
Rosuvastatin Calcium
108 claims
| Drug | Claims |
|---|---|
| Lisinopril | 199 |
| Atorvastatin Calcium | 197 |
| Levothyroxine Sodium | 155 |
| Hydrochlorothiazide | 127 |
| Lorazepam | 124 |
| Losartan Potassium | 120 |
| Metoprolol Tartrate | 109 |
| Rosuvastatin Calcium | 108 |
| Furosemide | 103 |
| Amlodipine Besylate | 100 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Nurse Practitioner Overview
How Melissa Armstrong, NP fits within the Nurse Practitioner landscape nationally.
87,227
Nurse Practitioner Providers in US
56
States with Nurse Practitioner
1,084
Avg Claims per Provider
Melissa Armstrong, NP's 4,175 claims are above the specialty average of 1,084.
Nearby Nurse Practitioner Providers in Illinois
Other clinicians with the same primary specialty enrolled in Illinois, drawn from the same CMS NPPES roster as Armstrong.
Dr. Janice Abadilla
FNP-BC
Peoria, IL
Dr. Roseviminda Abano
CNP
Gurnee, IL
Philomena Abebe
Park Ridge, IL
Dr. Milagros Abellera
APN
Chicago, IL
Dr. Edwina Abloh
APN-CNP
Skokie, IL
Compare Nurse Practitioner 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 Illinois medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Nurse Practitioner 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.
Healthcare Guides
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Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
What prescribing data reveals about a provider
In-Network vs Out-of-Network
How insurance networks affect your costs
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Virtual care options and coverage in 2026
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Frequently Asked Questions
What is Melissa Armstrong, NP's specialty? ▼
Melissa Armstrong, NP specializes in Nurse Practitioner and practices in Sterling, Illinois. Credentials: NP.
How much does Melissa Armstrong, NP prescribe under Medicare Part D? ▼
In 2023, Melissa Armstrong, NP wrote 4,175 Medicare Part D claims totaling $291K in drug costs for 273 beneficiaries.
Where is Melissa Armstrong, NP located? ▼
Melissa Armstrong, NP is located at 101 E MILLER RD, Sterling, IL, 61081. Phone: (815) 625-4790.
What is Melissa Armstrong, NP's NPI number? ▼
Melissa Armstrong, NP's National Provider Identifier (NPI) is 1194150862, issued on 09/12/2013.
Does Melissa Armstrong, NP prescribe more brand-name or generic drugs? ▼
Melissa Armstrong, NP's prescribing is 10% brand-name and 89% generic drugs by claim count, with $227K in brand drug costs.
Does Melissa Armstrong, NP prescribe opioids? ▼
Yes, Melissa Armstrong, NP had 193 opioid claims in 2023 with an opioid prescribing rate of 4.6%.
How many Nurse Practitioner providers are there in the US? ▼
There are 87,227 Nurse Practitioner providers across 56 states in the US. The average Nurse Practitioner provider writes 1,084 Medicare Part D claims per year.
What drugs does Melissa Armstrong, NP prescribe most often? ▼
Based on 2023 Medicare Part D data, Melissa Armstrong, NP's most frequently prescribed drugs include Lisinopril, Atorvastatin Calcium, Levothyroxine Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Melissa Armstrong, NP accept Medicare? ▼
Melissa Armstrong, NP appears in CMS Medicare data with 4,175 Part D claims and 273 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Melissa Armstrong, NP's credentials? ▼
Melissa Armstrong, NP's NPI is 1194150862 with credentials NP. 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
Compiled from official public sources by the PlainDoctor editorial team.