Dr. Basil Tzu Li Chang, DO
- Medicare services, 2024
- 101
- Medicare patients, 2024
- 107
- MIPS score, 2024
- 87
- Hospital affiliations
- 5
- Industry payments
- $15
- Practice address
- 300 Main Street, Lewiston, ME 04240
- Practice phone
- Call (207) 795-0111
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Chang's professional email, personal email and mobile number
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Dr. Basil Tzu Li Chang is an internist in Lewiston, Maine
Dr. Chang practices at Central Maine Medical Center in Lewiston, Maine, part of Prime Healthcare Services.
Dr. Chang's NPI, 1831175942, was assigned on December 20, 2005. Dr. Chang graduated from Touro Un College of Osteopathic Medicine, Vallejo in 2002. Dr. Chang holds California license 12686.
- NPI
- 1831175942NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6103847074
- NPI enumeration date
- December 20, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (207) 795-0111
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 50
- Medical school graduation
- 2002
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Basil Tzu Li Chang practices at Central Maine Medical Center in Lewiston, Maine
Dr. Chang's primary practice is Central Maine Medical Center, at 300 Main Street, Lewiston, ME 04240 in Androscoggin County. The practice phone is (207) 795-0111.
- Central Maine Medical Center300 Main Street, Lewiston, ME 04240 · Androscoggin CountyPhone(207) 795-0111
Source: Dmand AI Affiliation Data
Dr. Basil Tzu Li Chang is affiliated with 5 sites of care and 14 medical groups
Dr. Chang's primary practice is Central Maine Medical Center in Lewiston, Maine, part of Prime Healthcare Services. Dr. Chang is also affiliated with Holland Hospital. The medical group on file is Central Maine Medical Center. Dmand AI also links Dr. Chang to 3 more hospitals and 13 medical groups, each named with a free account. Dr. Chang's employer is on file too: a hospital.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Basil Tzu Li Chang's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chang practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Central Maine Medical Center | Available with a free account |
| +4 more sites and 13 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Basil Tzu Li Chang is one of 572 internists in Maine
Internal medicine is Dr. Chang's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dmand AI has Dr. Chang's licenses on file in 4 states: California, Idaho, Nevada and Ohio.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
- Idaho license
- Hospitalist, Nevada
- Ohio license
Internists near Dr. Chang
Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Basil Tzu Li Chang billed Medicare for 101 services in 2024
CMS data shows 101 Medicare services from Dr. Chang across 2 procedure codes in 2024, for 107 Medicare patients. Medicare paid $12,609 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Chang's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1252024: 10119%
Dr. Chang compared with the Maine median for internists, 2024
- Dr. Chang
- Maine median
- Medicare services
- 101vs 31468% below
- Medicare patients
- 107vs 15431% below
Medians across 600 internists in Maine with Dmand AI profiles that report each measure.
Dr. Chang's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Chang and other internists in Maine.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Basil Tzu Li Chang treated 107 Medicare patients in 2024, average age 78
CMS counts 107 Medicare patients who saw Dr. Chang in 2024. The largest group is 85 and over, with 37 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 29% are also on Medicaid. Their average risk score is 2.12, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Chang's median patient age at 74, with 57% women.
Dr. Chang's Medicare patients by age, 2024
Dr. Chang's Medicare patients by sex, 2024
- Women5450%
- Men5350%
Chronic conditions among Dr. Chang's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis61%
- Heart failure50%
- Chronic kidney disease49%
- Atrial fibrillation46%
- Ischemic heart disease46%
- Anxiety44%
Share of Medicare patients with each condition. A patient can have several.
Dr. Chang's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 74
Patient panel by sex, all payers
- Women57%
- Men42%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Basil Tzu Li Chang scored 87 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 87 out of 100 for Dr. Chang for performance year 2024, reported as part of a group. Dr. Chang accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Chang's MIPS scores, performance year 2024
- 87of 100Final score
- 76.5of 100Quality
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Basil Tzu Li Chang received $15 in industry payments in 2018
CMS Open Payments shows 1 general payment to Dr. Chang from 1 drug or device company in 2018. Food and beverage make up the largest share, 100% of the total. Portola Pharmaceuticals, LLC paid the most, $15.
Companies that paid Dr. Chang the most, 2018 to 2018
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Basil Tzu Li Chang graduated from Touro Un College of Osteopathic Medicine, Vallejo
Dr. Chang graduated from Touro Un College of Osteopathic Medicine, Vallejo in 2002.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Basil Tzu Li Chang's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Basil Tzu Li Chang
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Basil Tzu Li Chang's NPI number?
Dr. Basil Tzu Li Chang's NPI number is 1831175942. It was assigned on December 20, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Basil Tzu Li Chang?
Dr. Basil Tzu Li Chang is an internist in Lewiston, Maine. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Basil Tzu Li Chang practice?
Dr. Chang practices at 300 Main Street, Lewiston, ME 04240. Dr. Chang's primary practice is Central Maine Medical Center in Lewiston, Maine, part of Prime Healthcare Services. Dmand AI also links Dr. Chang to 3 hospitals and 13 medical groups.
What is Dr. Basil Tzu Li Chang's office phone number?
The practice phone on file for Dr. Chang is (207) 795-0111.
What is Dr. Basil Tzu Li Chang's medical license number?
Dr. Chang holds California license 12686, one of the licenses on file in 4 states.
Which states has Dr. Basil Tzu Li Chang been licensed in?
Dmand AI has state licenses on file for Dr. Chang in California, Idaho, Nevada and Ohio.
Which hospitals is Dr. Basil Tzu Li Chang affiliated with?
Dr. Chang practices at Central Maine Medical Center in Lewiston, Maine. Dr. Chang is also affiliated with Holland Hospital. Dmand AI links Dr. Chang to 3 more hospitals.
What medical group is Dr. Basil Tzu Li Chang part of?
Dr. Chang is linked to Central Maine Medical Center. Dmand AI links Dr. Chang to 13 more medical groups.
Does Dr. Basil Tzu Li Chang accept Medicare?
Yes. CMS data shows Dr. Chang billed Medicare for 101 services in 2024, and Dr. Chang accepts Medicare assignment.
What is Dr. Basil Tzu Li Chang's MIPS score?
Dr. Chang's MIPS final score for performance year 2024 is 87 out of 100, reported as part of a group.
Show 5 more questionsShow fewer questions
How many Medicare patients does Dr. Basil Tzu Li Chang see?
CMS counts 107 Medicare patients who saw Dr. Chang in 2024, with an average age of 78.
What services does Dr. Basil Tzu Li Chang bill to Medicare?
In 2024, Dr. Chang's most billed Medicare services were hospital inpatient care (99223) and hospital inpatient care (99222).
Where did Dr. Basil Tzu Li Chang go to medical school?
Dr. Chang graduated from Touro Un College of Osteopathic Medicine, Vallejo in 2002.
Has Dr. Basil Tzu Li Chang received payments from drug or device companies?
CMS Open Payments shows $15 in general payments to Dr. Chang from 1 company from 2018 to 2018. The largest total came from Portola Pharmaceuticals, LLC.
How long has Dr. Basil Tzu Li Chang been practicing?
Dr. Chang graduated from medical school in 2002, 24 years ago.
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