William Hayduk, PA-C, ND
NPI 1821363870 · Physician Assistant · Chicago, IL
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Hayduk, PA-C, ND is a Physician Assistant provider in Chicago, IL (NPI 1821363870).
Provider details
- NPI number
- 1821363870
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA-C, ND
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
- Naturopath175F00000X
Other Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
14 yrs in NPPES registry
- Profile completeness25% of score
83% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
136 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 116 | $76 |
| Aspiration And/Or Injection of Fluid From Large Joint20610 | 20 | $72 |
Typical Medicare-allowed amounts for these services range $72–$76 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 15 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 389 | 185 |
| Oxycodone Hcl/Acetaminophenbrand: Oxycodone-Acetaminophen | 70 | 36 |
| Cyclobenzaprine Hcl | 57 | 19 |
| Tramadol Hcl | 54 | 18 |
| Morphine Sulfatebrand: Morphine Sulfate Er | 45 | 23 |
| Gabapentin | 37 | 16 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$2,359 across 45 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2012-03-08
- Last updated
- 2021-12-30
- Certified
- 2021-12-30
Frequently asked questions
- What is William Hayduk's NPI number?
- William Hayduk's National Provider Identifier (NPI) is 1821363870, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Hayduk's specialty?
- William Hayduk is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is William Hayduk located?
- William Hayduk's practice location on file with NPPES is 6457 S Pulaski Rd, Chicago, IL 60629-5148.
- What is William Hayduk's phone number?
- The practice phone number listed in the NPPES registry for William Hayduk is (773) 767-2225.
- Does William Hayduk accept Medicare?
- William Hayduk is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Hayduk's NPI active?
- Yes — William Hayduk's NPI (1821363870) is active in the NPPES registry as of the last update on 2021-12-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.