Judy Chang-Witt, M.D.
NPI 1225326564 · Internal Medicine Physician · San Leandro, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Judy Chang-Witt, M.D. is a Internal Medicine Physician provider in San Leandro, CA (NPI 1225326564).
Provider details
- NPI number
- 1225326564
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 60317-20 (WI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
14 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 82 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 355 | 158 |
| Amlodipine Besylate | 240 | 108 |
| Losartan Potassium | 165 | 72 |
| Alendronate Sodium | 137 | 52 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 131 | 58 |
| Levothyroxine Sodium | 121 | 57 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2011-07-20
- Last updated
- 2022-01-11
Frequently asked questions
- What is Judy Chang-Witt's NPI number?
- Judy Chang-Witt's National Provider Identifier (NPI) is 1225326564, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Judy Chang-Witt's specialty?
- Judy Chang-Witt is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Judy Chang-Witt located?
- Judy Chang-Witt's practice location on file with NPPES is 2500 Merced St, San Leandro, CA 94577-4201.
- What is Judy Chang-Witt's phone number?
- The practice phone number listed in the NPPES registry for Judy Chang-Witt is (510) 454-7300.
- Does Judy Chang-Witt accept Medicare?
- Judy Chang-Witt is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Judy Chang-Witt's NPI active?
- Yes — Judy Chang-Witt's NPI (1225326564) is active in the NPPES registry as of the last update on 2022-01-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.