William Johnson, M.D.
NPI 1942433628 · Diagnostic Radiology Physician · Houston, TX
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Johnson, M.D. is a Diagnostic Radiology Physician provider in Houston, TX (NPI 1942433628).
Provider details
- NPI number
- 1942433628
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 35123301 (OH)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
16 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
1,228 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) |
|---|---|---|
| X-Ray of Chest, 1 View71045 | 275 | $8 |
| Ct Scan of Abdomen and Pelvis With Contrast74177 | 207 | $84 |
| Ct Scan of Blood Vessels of Chest With Contrast71275 | 115 | $83 |
| Ct Scan of Abdomen and Pelvis Without Contrast74176 | 113 | $81 |
| Ct Scan of Upper Spine Without Contrast72125 | 93 | $45 |
| Ct Scan of Chest With Contrast71260 | 77 | $52 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2009-08-28
- Last updated
- 2015-07-23
Frequently asked questions
- What is William Johnson's NPI number?
- William Johnson's National Provider Identifier (NPI) is 1942433628, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Johnson's specialty?
- William Johnson is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is William Johnson located?
- William Johnson's practice location on file with NPPES is 7026 Old Katy Rd, Houston, TX 77024-2133.
- What is William Johnson's phone number?
- The practice phone number listed in the NPPES registry for William Johnson is (713) 358-0562.
- Does William Johnson accept Medicare?
- William Johnson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Johnson's NPI active?
- Yes — William Johnson's NPI (1942433628) is active in the NPPES registry as of the last update on 2015-07-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.