Woody Chang
NPI 1295153187 · Geriatric Medicine (Internal Medicine) Physician · Sunnyvale, CA
Enrolled with Medicare as Practitioner - Geriatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Woody Chang is a Geriatric Medicine (Internal Medicine) Physician provider in Sunnyvale, CA (NPI 1295153187).
Provider details
- NPI number
- 1295153187
- Entity type
- Individual
- Primary specialty
- Geriatric Medicine (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- Yes
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
12 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
911 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) |
|---|---|---|
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 657 | $125 |
| Subsequent Nursing Facility Care With High Level of Medical Decision Making, Per Day, If Using Time, at Least 45 Minutes99310 | 109 | $178 |
| Initial Nursing Facility Care With High Level of Medical Decision Making, Per Day, If Using Time, 50 Minutes Or More99306 | 85 | $208 |
| Nursing Facility Discharge Management, More Than 30 Minutes99316 | 60 | $150 |
Typical Medicare-allowed amounts for these services range $125–$208 (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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 40 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Furosemide | 107 | 15 |
| Apixabanbrand: Eliquis | 86 | — |
| Atorvastatin Calcium | 52 | 14 |
| Gabapentin | 46 | — |
| Tamsulosin Hcl | 45 | — |
| Escitalopram Oxalate | 40 | — |
| Amlodipine Besylate |
Practice location
Mailing address
Registry dates
- Enumerated
- 2014-03-29
- Last updated
- 2018-12-10
Frequently asked questions
- What is Woody Chang's NPI number?
- Woody Chang's National Provider Identifier (NPI) is 1295153187, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Woody Chang's specialty?
- Woody Chang is listed in the NPPES registry with a primary specialty of Geriatric Medicine (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Woody Chang located?
- Woody Chang's practice location on file with NPPES is 301 Old San Francisco Rd, Sunnyvale, CA 94086-6386.
- What is Woody Chang's phone number?
- The practice phone number listed in the NPPES registry for Woody Chang is (408) 730-6250.
- Does Woody Chang accept Medicare?
- Woody Chang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Woody Chang's NPI active?
- Yes — Woody Chang's NPI (1295153187) is active in the NPPES registry as of the last update on 2018-12-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.