William Chizmar, AA
NPI 1700999513 · Anesthesiologist Assistant · Grand Rapids, MI
Enrolled with Medicare as Practitioner - Anesthesiology Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Chizmar, AA is a Anesthesiologist Assistant provider in Grand Rapids, MI (NPI 1700999513).
Provider details
- NPI number
- 1700999513
- Entity type
- Individual
- Primary specialty
- Anesthesiologist AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- AA
- Sex
- Male
- Sole proprietor
- No
- License
- 39 (MI)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
46 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Anesthesia for Other Procedure on Large Bowel Using an Endoscope00811 | 35 | $64 |
| Anesthesia for Exam of Colon Using an Endoscope00812 | 11 | $48 |
Typical Medicare-allowed amounts for these services range $48–$64 (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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-16
- Last updated
- 2014-07-03
Frequently asked questions
- What is William Chizmar's NPI number?
- William Chizmar's National Provider Identifier (NPI) is 1700999513, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Chizmar's specialty?
- William Chizmar is listed in the NPPES registry with a primary specialty of Anesthesiologist Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is William Chizmar located?
- William Chizmar's practice location on file with NPPES is 3333 Evergreen Dr Ne, Grand Rapids, MI 49525-9756.
- What is William Chizmar's phone number?
- The practice phone number listed in the NPPES registry for William Chizmar is (616) 364-4200.
- Does William Chizmar accept Medicare?
- William Chizmar is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Chizmar's NPI active?
- Yes — William Chizmar's NPI (1700999513) is active in the NPPES registry as of the last update on 2014-07-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.