William Phung
NPI 1023793023 · Physical Therapist · Sunnyvale, CA
Enrolled with Medicare as Practitioner - Physical Therapist in Private Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Phung is a Physical Therapist provider in Sunnyvale, CA (NPI 1023793023).
Provider details
- NPI number
- 1023793023
- Entity type
- Individual
- Primary specialty
- Physical TherapistRespiratory, Developmental, Rehabilitative and Restorative Service Providers
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Respiratory, Developmental, Rehabilitative and Restorative Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
3 yrs in NPPES registry
- Profile completeness28% of score
83% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
623 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) |
|---|---|---|
| Therapy Procedure Using Exercise to Develop Strength, Endurance, Range of Motion, and Flexibility, Each 15 Minutes97110 | 355 | $30 |
| Therapy Procedure Using Manual Technique, Each 15 Minutes97140 | 177 | $24 |
| Evaluation for Physical Therapy, Typically 20 Minutes97161 | 55 | $119 |
| Therapy Procedure Using Functional Activities97530 | 36 | $42 |
Typical Medicare-allowed amounts for these services range $24–$119 (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
- 2023-06-16
- Last updated
- 2023-06-16
- Certified
- 2023-06-15
Frequently asked questions
- What is William Phung's NPI number?
- William Phung's National Provider Identifier (NPI) is 1023793023, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Phung's specialty?
- William Phung is listed in the NPPES registry with a primary specialty of Physical Therapist (Respiratory, Developmental, Rehabilitative and Restorative Service Providers).
- Where is William Phung located?
- William Phung's practice location on file with NPPES is 1085 W El Camino Real, Sunnyvale, CA 94087-1030.
- What is William Phung's phone number?
- The practice phone number listed in the NPPES registry for William Phung is (408) 523-3060.
- Does William Phung accept Medicare?
- William Phung is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Phung's NPI active?
- Yes — William Phung's NPI (1023793023) is active in the NPPES registry as of the last update on 2023-06-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.