James Williams, CAA
NPI 1396271284 · Anesthesiologist Assistant · Grand Rapids, MI
Enrolled with Medicare as Practitioner - Anesthesiology Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
James Williams, CAA is a Anesthesiologist Assistant provider in Grand Rapids, MI (NPI 1396271284).
Provider details
- NPI number
- 1396271284
- Entity type
- Individual
- Primary specialty
- Anesthesiologist AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- CAA
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
- Anesthesiologist Assistant367H00000X
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
9 yrs in NPPES registry
- Profile completeness28% of score
83% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
14 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 | 14 | $65 |
Typical Medicare-allowed amounts for these services range $65–$65 (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
Additional practice locations (1)
- 110 Irving St NwWashington, DC 20010-3017Phone: (202) 877-7000
Registry dates
- Enumerated
- 2017-05-11
- Last updated
- 2022-06-02
- Certified
- 2022-06-02
Frequently asked questions
- What is James Williams's NPI number?
- James Williams's National Provider Identifier (NPI) is 1396271284, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is James Williams's specialty?
- James Williams is listed in the NPPES registry with a primary specialty of Anesthesiologist Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is James Williams located?
- James Williams's practice location on file with NPPES is 100 Michigan St Ne, Grand Rapids, MI 49503-2560.
- What is James Williams's phone number?
- The practice phone number listed in the NPPES registry for James Williams is (616) 364-4200.
- Does James Williams accept Medicare?
- James Williams is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is James Williams's NPI active?
- Yes — James Williams's NPI (1396271284) is active in the NPPES registry as of the last update on 2022-06-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.