Lydia Chang, M.D.
NPI 1972570141 · Pulmonary Disease Physician · Chapel Hill, NC
Enrolled with Medicare as Practitioner - Pulmonary Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Lydia Chang, M.D. is a Pulmonary Disease Physician provider in Chapel Hill, NC (NPI 1972570141).
Provider details
- NPI number
- 1972570141
- Entity type
- Individual
- Primary specialty
- Pulmonary Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 200100849 (NC)
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
20 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
1,018 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 322 | $119 |
| Critical Care, First 30-74 Minutes99291 | 136 | $198 |
| Test to Measure Expiratory Airflow and Volume94010 | 105 | $25 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 81 | $111 |
| Test to Examine How Well the Lungs Exchange Gases94729 | 79 | $51 |
| Test to Determine Lung Volumes Using Gas Dilution Or Washout94727 | 71 | $40 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 26 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Montelukast Sodium | 162 | 53 |
| Fluticasone/Umeclidin/Vilanterbrand: Trelegy Ellipta | 116 | 34 |
| Prednisone | 107 | 54 |
| Azithromycin | 104 | 28 |
| Fluticasone/Vilanterolbrand: Breo Ellipta | 98 | 27 |
| Umeclidinium Brm/Vilanterol Trbrand: Anoro Ellipta | 85 | 17 |
| Budesonide/Glycopyr/Formoterol |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-03-07
- Last updated
- 2014-03-06
Frequently asked questions
- What is Lydia Chang's NPI number?
- Lydia Chang's National Provider Identifier (NPI) is 1972570141, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Lydia Chang's specialty?
- Lydia Chang is listed in the NPPES registry with a primary specialty of Pulmonary Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Lydia Chang located?
- Lydia Chang's practice location on file with NPPES is 130 Mason Farm Rd, Chapel Hill, NC 27599-7020.
- What is Lydia Chang's phone number?
- The practice phone number listed in the NPPES registry for Lydia Chang is (919) 966-2531.
- Does Lydia Chang accept Medicare?
- Lydia Chang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Lydia Chang's NPI active?
- Yes — Lydia Chang's NPI (1972570141) is active in the NPPES registry as of the last update on 2014-03-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.