Thomas Chang, MD
NPI 1205908035 · Hospitalist Physician · Manteca, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Thomas Chang, MD is a Hospitalist Physician provider in Manteca, CA (NPI 1205908035).
Provider details
- NPI number
- 1205908035
- Entity type
- Individual
- Primary specialty
- Hospitalist PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A92634 (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
19 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
46 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 35 Minutes99232 | 46 | $77 |
Typical Medicare-allowed amounts for these services range $77–$77 (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 · 10 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Furosemide | 41 | 34 |
| Atorvastatin Calcium | 20 | 18 |
| Cefpodoxime Proxetil | 19 | 19 |
| Empagliflozinbrand: Jardiance | 18 | 15 |
| Losartan Potassium | 17 | 12 |
| Metoprolol Tartrate | 17 | 15 |
| Doxycycline Monohydrate | 15 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-15
- Last updated
- 2022-01-10
Frequently asked questions
- What is Thomas Chang's NPI number?
- Thomas Chang's National Provider Identifier (NPI) is 1205908035, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Thomas Chang's specialty?
- Thomas Chang is listed in the NPPES registry with a primary specialty of Hospitalist Physician (Allopathic & Osteopathic Physicians).
- Where is Thomas Chang located?
- Thomas Chang's practice location on file with NPPES is 1721 W Yosemite Ave, Manteca, CA 95337-5130.
- What is Thomas Chang's phone number?
- The practice phone number listed in the NPPES registry for Thomas Chang is (209) 476-2000.
- Does Thomas Chang accept Medicare?
- Thomas Chang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Thomas Chang's NPI active?
- Yes — Thomas Chang's NPI (1205908035) is active in the NPPES registry as of the last update on 2022-01-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.