Willard Chung, MD
NPI 1285898635 · Family Medicine Physician · Santa Maria, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Willard Chung, MD is a Family Medicine Physician provider in Santa Maria, CA (NPI 1285898635).
Provider details
- NPI number
- 1285898635
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A104456 (CA)
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
17 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
1,299 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 Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 599 | $121 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 274 | $118 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 217 | $81 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 148 | $177 |
| Critical Care, First 30-74 Minutes99291 | 34 | $212 |
| Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes99231 | 14 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 13 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 33 | 33 |
| Furosemide | 25 | 17 |
| Prednisone | 20 | 20 |
| Doxycycline Hyclate | 18 | 18 |
| Cephalexin | 18 | 18 |
| Levofloxacin | 15 | 13 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 14 | 14 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-07-15
- Last updated
- 2022-12-20
- Certified
- 2022-12-20
Frequently asked questions
- What is Willard Chung's NPI number?
- Willard Chung's National Provider Identifier (NPI) is 1285898635, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Willard Chung's specialty?
- Willard Chung is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Willard Chung located?
- Willard Chung's practice location on file with NPPES is 235 S Palisade Dr, Santa Maria, CA 93454.
- What is Willard Chung's phone number?
- The practice phone number listed in the NPPES registry for Willard Chung is (805) 739-3561.
- Does Willard Chung accept Medicare?
- Willard Chung is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Willard Chung's NPI active?
- Yes — Willard Chung's NPI (1285898635) is active in the NPPES registry as of the last update on 2022-12-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.