Thomas Chang, D.P.M.
NPI 1841315736 · Foot & Ankle Surgery Podiatrist · Santa Rosa, CA
Enrolled with Medicare as Practitioner - Podiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Thomas Chang, D.P.M. is a Foot & Ankle Surgery Podiatrist provider in Santa Rosa, CA (NPI 1841315736).
Provider details
- NPI number
- 1841315736
- Entity type
- Individual
- Primary specialty
- Foot & Ankle Surgery PodiatristPodiatric Medicine & Surgery Service Providers
- Credential
- D.P.M.
- Sex
- Male
- Sole proprietor
- Yes
- License
- E3908 (CA)
Specialties & taxonomies
Podiatric Medicine & Surgery Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
3,644 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 1,027 | $105 |
| X-Ray of Foot, Minimum of 3 Views73630 | 911 | $42 |
| Test Or Measurement for Functional Capacity, Each 15 Minutes97750 | 284 | $34 |
| X-Ray of Ankle, Minimum of 3 Views73610 | 250 | $45 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 228 | $147 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 207 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 6 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 108 | 83 |
| Cephalexin | 54 | 40 |
| Meloxicam | 37 | 20 |
| Terbinafine Hcl | 30 | 11 |
| Tramadol Hcl | 26 | 26 |
| Gabapentin | 24 | 12 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means , never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$117,164 across 72 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-03-20
- Last updated
- 2016-12-08
Frequently asked questions
- What is Thomas Chang's NPI number?
- Thomas Chang's National Provider Identifier (NPI) is 1841315736, 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 Foot & Ankle Surgery Podiatrist (Podiatric Medicine & Surgery Service Providers).
- Where is Thomas Chang located?
- Thomas Chang's practice location on file with NPPES is 208 Concourse Boulevard, Santa Rosa, CA 95403-8210.
- What is Thomas Chang's phone number?
- The practice phone number listed in the NPPES registry for Thomas Chang is (707) 544-3400.
- 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 (1841315736) is active in the NPPES registry as of the last update on 2016-12-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.