NPI registry status
Active
2026 NPPES data Psychiatric/Mental Health Nurse Practitioner NPI 1558153197 APN-CNP
Verify on CMS → Slade Zajac, APN-CNP
Psychiatric/Mental Health Nurse Practitioner in Arlington Heights, 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 40,776 in Psychiatric/Mental Health 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.
What the federal data shows
Slade Zajac, APN-CNP is a Psychiatric/Mental Health Nurse Practitioner in Arlington Heights, Illinois, listed in the federal CMS National Provider Identifier registry.
- #41
- Psychiatric/Mental Health Nurse Practitioner rank among Illinois specialties
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 Slade Zajac, APN-CNP
Bare NPI registry listing — limited federal enrichment beyond basic enumeration. Verify all credentials with official sources.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1558153197), first enumerated 05/20/2025.
Source: CMS NPPES
- Not in federal data
Medicare Part D participation
No 2023 Medicare Part D prescribing volume appears in the CMS public file for this NPI (may reflect specialty, new enrollment, or non-prescribing role).
Source: CMS Part D Prescriber PUF
- State context
State board disciplinary context
Illinois statewide board action statistics are published annually — these figures describe aggregate state activity, not Slade Zajac, APN-CNP's individual license status. Verify directly with the state medical board.
Source: IDFPR annual report 2023
- 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 1558153197 · Psychiatric/Mental Health Nurse Practitioner
NPI-10 · ENUM-NEW · TAX-MID · RX-NONE · BOOK-LIGHT · PHOTO-ENUM
- NPI-10 1558153197
- ENUM-NEW 2025
- TAX-MID 41K Psychiatric/Mental Health
- RX-NONE No Part D
- BOOK-LIGHT 1,124 in Illinois
- PHOTO-ENUM Oluwatoyin Akinyele · 2025
What does the federal data show about Slade Zajac, APN-CNP?
Quality data not reportedPrimary specialty
Psychiatric/Mental Health Nurse Practitioner
Specialty distribution in Illinois
How Psychiatric/Mental Health 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 Psychiatric/Mental Health 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).
Practice Address
Provider Details
| NPI | 1558153197 |
|---|---|
| Specialty | Psychiatric/Mental Health Nurse Practitioner |
| Credentials | APN-CNP |
| Gender | Male |
| NPI Issued | 05/20/2025 |
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 Slade Zajac, APN-CNP. To verify Slade Zajac, APN-CNP'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.
More Psychiatric/Mental Health Nurse Practitioner in IL →
All providers in Illinois →
Compare specialties →
Psychiatric/Mental Health Nurse Practitioner Overview
How Slade Zajac, APN-CNP fits within the Psychiatric/Mental Health Nurse Practitioner landscape nationally.
40,776
Psychiatric/Mental Health Nurse Practitioner Providers in US
54
States with Psychiatric/Mental Health Nurse Practitioner
927
Avg Claims per Provider
Nationwide Psychiatric/Mental Health Nurse Practitioner peers with similar MIPS or enrollment year
Two federal-record peer sets for Zajac, both outside Illinois so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2025)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Psychiatric/Mental Health Nurse Practitioner Providers in Illinois
Other clinicians with the same primary specialty enrolled in Illinois, drawn from the same CMS NPPES roster as Zajac.
One of 1,124 Psychiatric/Mental Health Nurse Practitioner providers enrolled in Illinois, 5 are shown here.
Dr. Afolasade Abayomi Jarrett
PMHNP-BC
Crest Hill, IL
Dr. Lindsay Abbott
PMHNP-BC
Chicago, IL
Muinat Abdulmajeed
Plainfield, IL
Dr. Olasumbo Abegunde
NP
Poplar Grove, IL
Rubabetu Abimbola Akinola
Aurora, IL
Compare Psychiatric/Mental Health Nurse Practitioner nationally: see state-by-state distribution →
Frequently Asked Questions
What is Slade Zajac, APN-CNP's specialty? ▼
Slade Zajac, APN-CNP specializes in Psychiatric/Mental Health Nurse Practitioner and practices in Arlington Heights, Illinois. Credentials: APN-CNP.
Where is Slade Zajac, APN-CNP located? ▼
Slade Zajac, APN-CNP is located at 800 W CENTRAL RD, Arlington Heights, IL, 60005. Phone: (847) 618-1000.
What is Slade Zajac, APN-CNP's NPI number? ▼
Slade Zajac, APN-CNP's National Provider Identifier (NPI) is 1558153197, issued on 05/20/2025.
How many Psychiatric/Mental Health Nurse Practitioner providers are there in the US? ▼
There are 40,776 Psychiatric/Mental Health Nurse Practitioner providers across 54 states in the US. The average Psychiatric/Mental Health Nurse Practitioner provider writes 927 Medicare Part D claims per year.
Does Slade Zajac, APN-CNP accept Medicare? ▼
Slade Zajac, APN-CNP appears in CMS Medicare data. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Slade Zajac, APN-CNP's credentials? ▼
Slade Zajac, APN-CNP's NPI is 1558153197 with credentials APN-CNP. 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.
- 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.