Steve Chang, MD
NPI 1639376064 · Surgery Physician · Monterey, CA
Enrolled with Medicare as Practitioner - General Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Steve Chang, MD is a Surgery Physician provider in Monterey, CA (NPI 1639376064).
Provider details
- NPI number
- 1639376064
- Entity type
- Individual
- Primary specialty
- Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A109993 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
18 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
582 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 | 179 | $96 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 105 | $117 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 102 | $132 |
| Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes99231 | 83 | $50 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 28 | $136 |
| Repair of Groin Hernia Using an Endoscope |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Tramadol Hcl | 41 | 39 |
| Pantoprazole Sodium | 35 | 14 |
| Oxycodone Hcl | 25 | 25 |
| Neomycin Sulfate | 16 | 15 |
| Metronidazole | 15 | 14 |
| Sodium, Potassium,mag Sulfatesbrand: Sod Sulf-Potass Sulf-Mag Sulf | 14 | 13 |
| Amlodipine Besylate | 11 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$3,623 across 8 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
- 2007-06-29
- Last updated
- 2019-10-18
Frequently asked questions
- What is Steve Chang's NPI number?
- Steve Chang's National Provider Identifier (NPI) is 1639376064, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Steve Chang's specialty?
- Steve Chang is listed in the NPPES registry with a primary specialty of Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Steve Chang located?
- Steve Chang's practice location on file with NPPES is 2 Upper Ragsdale Dr, Monterey, CA 93940-5736.
- What is Steve Chang's phone number?
- The practice phone number listed in the NPPES registry for Steve Chang is (831) 649-0808.
- Does Steve Chang accept Medicare?
- Steve Chang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Steve Chang's NPI active?
- Yes — Steve Chang's NPI (1639376064) is active in the NPPES registry as of the last update on 2019-10-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.