Bailey Chang, MD
NPI 1427494913 · Internal Medicine Physician · Boston, MA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Bailey Chang, MD is a Internal Medicine Physician provider in Boston, MA (NPI 1427494913).
Provider details
- NPI number
- 1427494913
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 2019-00239 (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
13 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
138 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 | 56 | $101 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 52 | $82 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 30 | $69 |
Typical Medicare-allowed amounts for these services range $69–$101 (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 · 50 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 160 | 51 |
| Gabapentin | 109 | 35 |
| Amlodipine Besylate | 105 | 36 |
| Oxycodone Hcl | 87 | 13 |
| Lisinopril | 74 | 25 |
| Metformin Hcl | 68 | 21 |
| Losartan Potassium |
Practice location
Mailing address
Additional practice locations (1)
- 801 Massachusetts AveCrosstown 2Boston, MA 02118Phone: (617) 414-7399
Registry dates
- Enumerated
- 2013-05-11
- Last updated
- 2022-01-13
- Certified
- 2022-01-11
Frequently asked questions
- What is Bailey Chang's NPI number?
- Bailey Chang's National Provider Identifier (NPI) is 1427494913, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Bailey Chang's specialty?
- Bailey Chang is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Bailey Chang located?
- Bailey Chang's practice location on file with NPPES is 801 Massachusetts Ave, Boston, MA 02118.
- What is Bailey Chang's phone number?
- The practice phone number listed in the NPPES registry for Bailey Chang is (617) 414-5951.
- Does Bailey Chang accept Medicare?
- Bailey Chang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Bailey Chang's NPI active?
- Yes — Bailey Chang's NPI (1427494913) is active in the NPPES registry as of the last update on 2022-01-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.