NPI registry status
Active
2026 NPPES data Clinical Nurse Specialist NPI 1427281336 NP
Verify on CMS → John Stryker, NP
Clinical Nurse Specialist 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 1,715 in Clinical Nurse Specialist, 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
970
Medicare Part D claims · 106 beneficiaries · Clinical Nurse Specialist avg: 953
Generic prescribing
76%
generic claims · 22% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$129.99
2 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
John Stryker, NP filed 970 Medicare Part D claims in 2023 as a Clinical Nurse Specialist in Chicago, Illinois, prescribing 76% generic.
- 970
- Part D claims, 2023
- 76%
- generic prescribing
- $129.99
- 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.
John Stryker, NP's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
970 Top 25% higher than 75% 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 John Stryker, NP?
Quality data not reportedPrimary specialty
Clinical Nurse Specialist
Medicare Part D claims
970 2% vs specialty avg
Specialty distribution in Illinois
How Clinical Nurse Specialist 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 Clinical Nurse Specialist. 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).
John Stryker, NP appears in the CMS NPPES registry as a Clinical Nurse Specialist provider holding NP credentials at 5537 N BROADWAY ST, Chicago, IL, 60640, with a listed phone of (737) 989-9400. NPI 1427281336 was issued on 08/25/2009.
Medicare Part D records for calendar year 2023 show 970 prescription claims written by this provider, covering 106 Medicare beneficiaries and totaling roughly $439K in drug spend, split 22% brand-name and 76% generic by claim count, with an opioid prescribing rate of 1.8%.
Clinical Nurse Specialist is a narrow specialty nationwide, with 1,715 enrolled providers across 49 states and an average of 953 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 | 1427281336 |
|---|---|
| Specialty | Clinical Nurse Specialist |
| Credentials | NP |
| Gender | Male |
| NPI Issued | 08/25/2009 |
Hospital and facility affiliations
Facilities where John Stryker, 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.
Tpa Network Incorporated
Chicago, IL
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 John Stryker, NP. Source: openpaymentsdata.cms.gov.
Total received
$130
Largest payer
Gilead Sciences, 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.
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 John Stryker, NP. To verify John Stryker, 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
John Stryker, NP - brand share 22.0%
Clinical Nurse Specialist average
22% brand-name claims vs 76% generic, on 970 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.
970
Total Claims
$439K
Total Drug Cost
106
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 2,195
- Total Day Supply
- 64,191
- Brand vs Generic
- 22% brand / 76% generic
- Brand Drug Cost
- $412K
- Generic Drug Cost
- $26K
- Opioid Claims
- 17 (1.8% rate)
- Antibiotic Claims
- 14
Patient Demographics
- Average Patient Age
- 68.4 years
- Avg HCC Risk Score
- 1.12
- Gender Split
- 60% female / 40% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What John Stryker, NP prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
64 claims
- Amlodipine Besylate
Amlodipine Besylate
50 claims
- Metformin Hcl
Metformin Hcl
38 claims
- Losartan Potassium
Losartan Potassium
31 claims
- Biktarvy 23
Biktarvy
23 claims
- Metoprolol Succinate 22
Metoprolol Succinate
22 claims
- Famotidine 21
Famotidine
21 claims
- Gabapentin 21
Gabapentin
21 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 64 |
| Amlodipine Besylate | 50 |
| Metformin Hcl | 38 |
| Losartan Potassium | 31 |
| Biktarvy Bictegrav/Emtricit/Tenofov Ala | 23 |
| Metoprolol Succinate | 22 |
| Famotidine | 21 |
| Gabapentin | 21 |
| Omeprazole | 21 |
| Warfarin Sodium | 21 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Clinical Nurse Specialist Overview
How John Stryker, NP fits within the Clinical Nurse Specialist landscape nationally.
1,715
Clinical Nurse Specialist Providers in US
49
States with Clinical Nurse Specialist
953
Avg Claims per Provider
John Stryker, NP's 970 claims are above the specialty average of 953.
Nearby Clinical Nurse Specialist Providers in Illinois
Other clinicians with the same primary specialty enrolled in Illinois, drawn from the same CMS NPPES roster as Stryker.
Dr. Jeffrey Albaugh
PHD, APRN, CUCNS
Glenview, IL
Dr. Chris Ayers
CNS
Galesburg, IL
Dr. Virginia Baker
MSN APN
Chicago, IL
Dr. Maria Barnes
C.N.S.
Chicago, IL
Dr. Cynthia Barrett
A.P.N. CCNS
Jerseyville, IL
Compare Clinical Nurse Specialist 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 Clinical Nurse Specialist 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
Learn more about finding, verifying, and understanding healthcare providers.
How to Find a Doctor
Step-by-step guide to choosing a provider
Verify Credentials
Check NPI, board certification & license status
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
Telehealth Guide
Virtual care options and coverage in 2026
Explore Illinois
Frequently Asked Questions
What is John Stryker, NP's specialty? ▼
John Stryker, NP specializes in Clinical Nurse Specialist and practices in Chicago, Illinois. Credentials: NP.
How much does John Stryker, NP prescribe under Medicare Part D? ▼
In 2023, John Stryker, NP wrote 970 Medicare Part D claims totaling $439K in drug costs for 106 beneficiaries.
Where is John Stryker, NP located? ▼
John Stryker, NP is located at 5537 N BROADWAY ST, Chicago, IL, 60640. Phone: (737) 989-9400.
What is John Stryker, NP's NPI number? ▼
John Stryker, NP's National Provider Identifier (NPI) is 1427281336, issued on 08/25/2009.
Does John Stryker, NP prescribe more brand-name or generic drugs? ▼
John Stryker, NP's prescribing is 22% brand-name and 76% generic drugs by claim count, with $412K in brand drug costs.
Does John Stryker, NP prescribe opioids? ▼
Yes, John Stryker, NP had 17 opioid claims in 2023 with an opioid prescribing rate of 1.8%.
How many Clinical Nurse Specialist providers are there in the US? ▼
There are 1,715 Clinical Nurse Specialist providers across 49 states in the US. The average Clinical Nurse Specialist provider writes 953 Medicare Part D claims per year.
What drugs does John Stryker, NP prescribe most often? ▼
Based on 2023 Medicare Part D data, John Stryker, NP's most frequently prescribed drugs include Atorvastatin Calcium, Amlodipine Besylate, Metformin Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does John Stryker, NP accept Medicare? ▼
John Stryker, NP appears in CMS Medicare data with 970 Part D claims and 106 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify John Stryker, NP's credentials? ▼
John Stryker, NP's NPI is 1427281336 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.
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.