Michael Williams, PA
NPI 1790342426 · Physician Assistant · Frederickburg, VA
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Michael Williams, PA is a Physician Assistant provider in Frederickburg, VA (NPI 1790342426).
Provider details
- NPI number
- 1790342426
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA
- Sex
- Male
- Sole proprietor
- No
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 tenure25% of score
7 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
1,307 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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 927 | $102 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 211 | $73 |
| Injection of Trigger Points, 3 Or More Muscles20553 | 62 | $47 |
| Aspiration And/Or Injection of Fluid From Large Joint20610 | 44 | $59 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 33 | $91 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 27 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Oxycodone Hcl | 594 | 135 |
| Oxycodone Hcl/Acetaminophenbrand: Oxycodone-Acetaminophen | 495 | 128 |
| Gabapentin | 454 | 136 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 289 | 82 |
| Morphine Sulfatebrand: Morphine Sulfate Er | 229 | 48 |
| Tramadol Hcl | 176 | 53 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$742 across 37 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
- 2019-05-29
- Last updated
- 2022-03-06
- Certified
- 2022-03-06
Frequently asked questions
- What is Michael Williams's NPI number?
- Michael Williams's National Provider Identifier (NPI) is 1790342426, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Williams's specialty?
- Michael Williams is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Michael Williams located?
- Michael Williams's practice location on file with NPPES is 411 B Park Hill Dr, Frederickburg, VA 22401.
- What is Michael Williams's phone number?
- The practice phone number listed in the NPPES registry for Michael Williams is (540) 368-3917.
- Does Michael Williams accept Medicare?
- Michael Williams is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Michael Williams's NPI active?
- Yes — Michael Williams's NPI (1790342426) is active in the NPPES registry as of the last update on 2022-03-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.