Appl Clin Inform
NeurologyWomen's Health
Dr. Zachary Chen Liao, MD, MPH, MS
NPI1538692207PAC ID0840617668
- Medicare services, 2024
- 462
- Medicare patients, 2024
- 78
- Part D claims, 2024
- 965
- Publications
- 4
- Affiliated sites
- 1
- Practice address
- 111 Grossman Dr, Braintree, MA 02184
- Practice phone
- Call (617) 421-1000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Harvard Vanguard Medical Associates
Braintree, Massachusetts
Find Dr. Liao's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Zachary Chen Liao is an internist in Braintree, Massachusetts
Dr. Liao practices at Harvard Vanguard Medical Associates in Braintree, Massachusetts.
Dr. Liao's NPI, 1538692207, was assigned on April 9, 2017. Dr. Liao graduated from University of Washington School of Medicine in 2017. Dr. Liao holds Massachusetts license 294797.
NPI and contact details
- NPI
- 1538692207NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0840617668
- NPI enumeration date
- April 9, 2017
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (617) 421-1000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 35
- Medical school graduation
- 2017
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Zachary Chen Liao practices at Harvard Vanguard Medical Associates in Braintree, Massachusetts
Dr. Liao's primary practice is Harvard Vanguard Medical Associates, at 111 Grossman Dr, Braintree, MA 02184 in Norfolk County. The practice phone is (617) 421-1000.
- Harvard Vanguard Medical Associates111 Grossman Dr, Braintree, MA 02184 · Norfolk CountyPhone(617) 421-1000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Zachary Chen Liao is affiliated with 2 sites of care and 1 medical group
Dr. Liao's primary practice is Harvard Vanguard Medical Associates in Braintree, Massachusetts. The medical group on file is Atrius Health. Dmand AI also links Dr. Liao to 1 more group practice or clinic, named with a free account.
Harvard Vanguard Medical AssociatesPrimary
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Zachary Chen Liao's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Liao practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Harvard Vanguard Medical Associates | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
See the EHR and IT leaders at every site where Dr. Liao practices
Dmand AI maps EHR vendors, IT decision makers and buying committees across each health system and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Zachary Chen Liao is one of 5,528 internists in Massachusetts
Internal medicine is Dr. Liao's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Liao is licensed in Massachusetts.
Specialties and state licenses
- Internal medicine, MassachusettsPrimary
Internists near Dr. Liao
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. Zachary Chen Liao billed Medicare for 462 services in 2024
CMS data shows 462 Medicare services from Dr. Liao across 17 procedure codes in 2024, for 78 Medicare patients. Medicare paid $13,637 for them. Every service was in an office.
Medicare services, 2024462
Medicare patients78
Paid by Medicare$13,637
Procedure codes17
Dr. Liao's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Lab and pathology
- 2023: 402024: 183358%
- Surgery
- 2023: 392024: 105169%
- Office and hospital visits
- 2023: 572024: 9261%
- Tests and treatments
- 2023: 02024: 43
- Other services
- 2023: 312024: 3926%
Dr. Liao compared with the Massachusetts median for internists, 2024
- Dr. Liao
- Massachusetts median
- Medicare services
- 462vs 4317% above
- Medicare patients
- 78vs 19460% below
- Part D claims
- 551vs 40237% above
Medians across 5,369 internists in Massachusetts with Dmand AI profiles that report each measure.
Dr. Liao'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.
Need commercial claims for Dr. Liao?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Liao and other internists in Massachusetts.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Zachary Chen Liao treated 78 Medicare patients in 2024, average age 75
CMS counts 78 Medicare patients who saw Dr. Liao in 2024. The largest group is 75 to 84, with 32 patients. 67% of them have high blood pressure, and 55% have high cholesterol. 15% are also on Medicaid. Their average risk score is 1.12, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Liao's median patient age at 55, with 29% women.
Medicare patients, 202478
Average age75
Average risk score1.12
Also on Medicaid15%
Dr. Liao's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Liao's Medicare patients by sex, 2024
- Women3747%
- Men4153%
Chronic conditions among Dr. Liao's Medicare patients, 2024
- High blood pressure67%
- High cholesterol55%
- Diabetes28%
- Chronic kidney disease27%
- Arthritis24%
- Ischemic heart disease24%
- Atrial fibrillation21%
- Cancer18%
Share of Medicare patients with each condition. A patient can have several.
Dr. Liao's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 55
Patient panel by sex, all payers
- Women29%
- Men70%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Zachary Chen Liao wrote 965 Medicare Part D claims in 2024
In 2024, Dr. Liao wrote 965 Medicare Part D claims for 129 patients. 83% of them were for generic drugs. CMS names the drug for 551 of them, across 25 drugs with 11 or more claims each, at $65,883 in total drug cost. In 2023, CMS named 68 claims across 4 drugs.
Part D claims, 2024965
Drugs named by CMS25
Total drug cost$65,883
Part D patients129
Dr. Liao's Part D claims by kind of drug, 2024
- Generic798 claims83%
- Brand-name and other167 claims17%
Dr. Liao's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Liao's Part D claims, 2024
- Opioids3%30 of 965 claims
- Antibiotics1%14 of 965 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 682024: 551710%
Drugs named by CMS: 25 in 2024, 4 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Zachary Chen Liao offers telehealth to Medicare patients
Dr. Liao accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Liao as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
For MedTech and pharma teams
Find internists like Dr. Liao by procedure volume and prescribing
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Zachary Chen Liao has 4 publications on record
Dmand AI links 4 papers to Dr. Liao, published from 2019 to 2022. 2022 was the busiest year, with 2. Dr. Liao's most frequent co-authors are Hasan Bilal Ahmad, DO, MBA, Ellen King Araj, MD and Mehrdad Arjomandi, MD.
Papers4
Years published2019 to 2022
Dr. Liao's papers by year, 2019 to 2022
Dr. Liao's most frequent co-authors
- Hasan Bilal Ahmad, DO, MBA1 shared paper
- Ellen King Araj, MD1 shared paper
- Mehrdad Arjomandi, MD1 shared paper
Recent publications by Dr. Liao
J Med Internet Res
Disease ProgressionMachine LearningPulmonary Disease, Chronic Obstructive
See who Dr. Liao researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Liao works with, so you can find a warm path to the right internists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Zachary Chen Liao graduated from University of Washington School of Medicine
Dr. Liao graduated from University of Washington School of Medicine in 2017.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Zachary Chen Liao'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation 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) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - 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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| 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. Zachary Chen Liao
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. Zachary Chen Liao's NPI number?
Dr. Zachary Chen Liao's NPI number is 1538692207. It was assigned on April 9, 2017, and it is active in the NPI Registry.
What kind of doctor is Dr. Zachary Chen Liao?
Dr. Zachary Chen Liao is an internist in Braintree, Massachusetts. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Zachary Chen Liao practice?
Dr. Liao practices at 111 Grossman Dr, Braintree, MA 02184. Dr. Liao's primary practice is Harvard Vanguard Medical Associates in Braintree, Massachusetts. Dmand AI also links Dr. Liao to 1 group practice or clinic.
What is Dr. Zachary Chen Liao's office phone number?
The practice phone on file for Dr. Liao is (617) 421-1000.
What is Dr. Zachary Chen Liao's medical license number?
Dr. Liao holds Massachusetts license 294797.
What medical group is Dr. Zachary Chen Liao part of?
Dr. Liao is linked to Atrius Health.
Does Dr. Zachary Chen Liao accept Medicare?
Yes. CMS data shows Dr. Liao billed Medicare for 462 services in 2024, and Dr. Liao accepts Medicare assignment.
Does Dr. Zachary Chen Liao offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Liao as offering telehealth services.
How many Medicare patients does Dr. Zachary Chen Liao see?
CMS counts 78 Medicare patients who saw Dr. Liao in 2024, with an average age of 75.
What services does Dr. Zachary Chen Liao bill to Medicare?
In 2024, Dr. Liao's most billed Medicare services were surgery: heart and blood vessels (36415), office visit, established patient (99213) and office visit, established patient (99214).
Show 5 more questionsShow fewer questions
Where did Dr. Zachary Chen Liao go to medical school?
Dr. Liao graduated from University of Washington School of Medicine in 2017.
What drugs does Dr. Zachary Chen Liao prescribe most?
In 2024 Medicare Part D data, Dr. Liao's most prescribed drugs by claims were Amlodipine Besylate, Atorvastatin Calcium and Lisinopril.
How long has Dr. Zachary Chen Liao been practicing?
Dr. Liao graduated from medical school in 2017, 9 years ago.
Does Dr. Zachary Chen Liao do research?
Dmand AI links 4 publications to Dr. Liao, published from 2019 to 2022.
Who does Dr. Zachary Chen Liao publish with?
Dr. Liao's most frequent co-authors are Hasan Bilal Ahmad, DO, MBA (1 shared paper), Ellen King Araj, MD (1 shared paper) and Mehrdad Arjomandi, MD (1 shared paper).
Selling to internal medicine practices?
See internists in Massachusetts by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card