Ruby Chang, M.D.
NPI 1396109237 · Anatomic Pathology & Clinical Pathology Physician · Austin, TX
Enrolled with Medicare as Practitioner - Pathology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ruby Chang, M.D. is a Anatomic Pathology & Clinical Pathology Physician provider in Austin, TX (NPI 1396109237).
Provider details
- NPI number
- 1396109237
- Entity type
- Individual
- Primary specialty
- Anatomic Pathology & Clinical Pathology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
10 yrs in NPPES registry
- Profile completeness28% of score
83% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
1,233 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) |
|---|---|---|
| Pathology Examination of Tissue Using a Microscope, Intermediate Complexity88305 | 465 | $36 |
| Special Stained Specimen Slides to Examine Tissue, Each Additional Procedure88341 | 215 | $27 |
| Pathology Examination of Tissue Using a Microscope, Moderately High Complexity88307 | 147 | $79 |
| Special Stained Specimen Slides to Examine Tissue, Initial Procedure88342 | 116 | $33 |
| Evaluation of Fine Needle Aspirate With Interpretation and Report88173 | 50 | $67 |
| Pathology Examination of Tissue Using a Microscope, Moderately Low Complexity88304 | 37 | $11 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2016-04-06
- Last updated
- 2021-07-20
- Certified
- 2021-07-20
Frequently asked questions
- What is Ruby Chang's NPI number?
- Ruby Chang's National Provider Identifier (NPI) is 1396109237, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ruby Chang's specialty?
- Ruby Chang is listed in the NPPES registry with a primary specialty of Anatomic Pathology & Clinical Pathology Physician (Allopathic & Osteopathic Physicians).
- Where is Ruby Chang located?
- Ruby Chang's practice location on file with NPPES is 3445 Executive Center Dr., Austin, TX 78731-1678.
- What is Ruby Chang's phone number?
- The practice phone number listed in the NPPES registry for Ruby Chang is (512) 579-4000.
- Does Ruby Chang accept Medicare?
- Ruby Chang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ruby Chang's NPI active?
- Yes — Ruby Chang's NPI (1396109237) is active in the NPPES registry as of the last update on 2021-07-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.