Dr. Michael Liu, MD
- Medicare services, 2024
- 1,204
- Medicare patients, 2024
- 325
- Part D claims, 2024
- 539
- MIPS score, 2024
- 100
- Hospital affiliations
- 2
- Practice address
- 5 Perryridge Rd, Greenwich, CT 06830
- Practice phone
- Call (203) 863-3000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Liu'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. Michael Liu is an internist in Greenwich, Connecticut
Dr. Liu practices at Greenwich Hospital in Greenwich, Connecticut, part of Yale New Haven Health System.
Dr. Liu's NPI, 1376735662, was assigned on August 10, 2007. Dr. Liu holds New York license 245544.
- NPI
- 1376735662NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8022173293
- NPI enumeration date
- August 10, 2007
- NPI status
- Active
- Offers telehealth
- Yes
- Practice phone
- (203) 863-3000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 49
- Medical school graduation
- 2003
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Michael Liu practices at Greenwich Hospital in Greenwich, Connecticut
Dr. Liu's primary practice is Greenwich Hospital, at 5 Perryridge Rd, Greenwich, CT 06830 in Fairfield County. The practice phone is (203) 863-3000.
- Greenwich Hospital5 Perryridge Rd, Greenwich, CT 06830 · Fairfield CountyPhone(203) 863-3000
Source: Dmand AI Affiliation Data
Dr. Michael Liu is affiliated with 7 sites of care and 4 medical groups
Dr. Liu's primary practice is Greenwich Hospital in Greenwich, Connecticut, part of Yale New Haven Health System. Dr. Liu is also affiliated with Yale New Haven Hospital. The medical group on file is Greenwich Hospital. Dmand AI also links Dr. Liu to 3 more medical groups, 2 group practices and clinics, 2 home health agencies and 1 physician office, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Michael Liu's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Liu practices, 7 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Greenwich Hospital | Available with a free account |
| +6 more sites and 3 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Yale New Haven Health System and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Michael Liu is one of 2,189 internists in Connecticut
Internal medicine is Dr. Liu's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Liu is licensed in New York.
Specialties and state licenses
- Internal medicine, New YorkPrimary
Internists near Dr. Liu
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. Michael Liu billed Medicare for 1,204 services in 2024
CMS data shows 1,204 Medicare services from Dr. Liu across 11 procedure codes in 2024, for 325 Medicare patients. Medicare paid $88,905 for them.
Dr. Liu's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 9802024: 1,0214%
- Surgery
- 2023: 1272024: 1206%
- Tests and treatments
- 2023: 382024: 38No change
- Lab and pathology
- 2023: 172024: 1324%
- Other services
- 2023: 02024: 12
Where Dr. Liu's Medicare services took place, 2024
- In an office43436%
- In a facility77064%
Dr. Liu compared with the Connecticut median for internists, 2024
- Dr. Liu
- Connecticut median
- Medicare services
- 1,204vs 3903.1 times
- Medicare patients
- 325vs 17289% above
- Part D claims
- 218vs 34336% below
Medians across 2,185 internists in Connecticut with Dmand AI profiles that report each measure.
Dr. Liu'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. Liu?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Liu and other internists in Connecticut.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Michael Liu treated 325 Medicare patients in 2024, average age 81
CMS counts 325 Medicare patients who saw Dr. Liu in 2024. The largest group is 75 to 84, with 127 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 16% are also on Medicaid. Their average risk score is 1.93, 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. Liu's median patient age at 77, with 53% women.
Dr. Liu's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Liu's Medicare patients by sex, 2024
- Women18356%
- Men14244%
Chronic conditions among Dr. Liu's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis65%
- Mood disorders39%
- Atrial fibrillation38%
- Ischemic heart disease38%
- Anxiety36%
- Chronic kidney disease33%
Share of Medicare patients with each condition. A patient can have several.
Dr. Liu's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 77
Patient panel by sex, all payers
- Women53%
- Men43%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Michael Liu wrote 539 Medicare Part D claims in 2024
In 2024, Dr. Liu wrote 539 Medicare Part D claims for 170 patients. 80% of them were for generic drugs. CMS names the drug for 218 of them, across 12 drugs with 11 or more claims each, at $33,719 in total drug cost. In 2023, CMS named 200 claims across 11 drugs.
Dr. Liu's Part D claims by kind of drug, 2024
- Generic430 claims80%
- Brand-name88 claims16%
- Other21 claims4%
Dr. Liu'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. Liu's Part D claims, 2024
- Antibiotics14%73 of 539 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: 2002024: 2189%
Drugs named by CMS: 12 in 2024, 11 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. Michael Liu scored 100 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 100 out of 100 for Dr. Liu for performance year 2024, reported through an alternative payment model (APM). CMS lists Dr. Liu as offering telehealth.
- Offers telehealth
- Yes
Dr. Liu's MIPS scores, performance year 2024
- 100of 100Final score
- 86.5of 100Quality
- 100of 100Promoting Interoperability
- 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
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Michael Liu received $610 in industry payments from 2017 to 2022
CMS Open Payments shows 7 general payments to Dr. Liu from 4 drug and device companies from 2017 to 2022. Travel and lodging make up the largest share, 91% of the total. Intuitive Surgical, Inc. paid the most, $556.
General payments to Dr. Liu by program year, 2017 to 2022
General payments to Dr. Liu by kind, 2017 to 2022
- Travel and lodging$55691%
- Food and beverage$549%
Companies that paid Dr. Liu the most, 2017 to 2022
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Michael Liu'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) |
| 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)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. Michael Liu
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. Michael Liu's NPI number?
Dr. Michael Liu's NPI number is 1376735662. It was assigned on August 10, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Michael Liu?
Dr. Michael Liu is an internist in Greenwich, Connecticut. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Michael Liu practice?
Dr. Liu practices at 5 Perryridge Rd, Greenwich, CT 06830. Dr. Liu's primary practice is Greenwich Hospital in Greenwich, Connecticut, part of Yale New Haven Health System. Dmand AI also links Dr. Liu to 3 medical groups, 2 group practices and clinics, 2 home health agencies and 1 physician office.
What is Dr. Michael Liu's office phone number?
The practice phone on file for Dr. Liu is (203) 863-3000.
What is Dr. Michael Liu's medical license number?
Dr. Liu holds New York license 245544.
Which hospitals is Dr. Michael Liu affiliated with?
Dr. Liu practices at Greenwich Hospital in Greenwich, Connecticut. Dr. Liu is also affiliated with Yale New Haven Hospital.
What medical group is Dr. Michael Liu part of?
Dr. Liu is linked to Greenwich Hospital. Dmand AI links Dr. Liu to 3 more medical groups.
Does Dr. Michael Liu accept Medicare?
Yes. CMS data shows Dr. Liu billed Medicare for 1,204 services in 2024.
Does Dr. Michael Liu offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Liu as offering telehealth services.
What is Dr. Michael Liu's MIPS score?
Dr. Liu's MIPS final score for performance year 2024 is 100 out of 100, reported through an alternative payment model (APM).
Show 5 more questionsShow fewer questions
How many Medicare patients does Dr. Michael Liu see?
CMS counts 325 Medicare patients who saw Dr. Liu in 2024, with an average age of 81.
What services does Dr. Michael Liu bill to Medicare?
In 2024, Dr. Liu's most billed Medicare services were hospital inpatient care (99232), hospital inpatient care (99233) and office visit, established patient (99214).
What drugs does Dr. Michael Liu prescribe most?
In 2024 Medicare Part D data, Dr. Liu's most prescribed drugs by claims were Amlodipine Besylate, Eliquis and Metoprolol Tartrate.
Has Dr. Michael Liu received payments from drug or device companies?
CMS Open Payments shows $610 in general payments to Dr. Liu from 4 companies from 2017 to 2022. The largest total came from Intuitive Surgical, Inc.
How long has Dr. Michael Liu been practicing?
Dr. Liu graduated from medical school in 2003, 23 years ago.
Selling to internal medicine practices?
See internists in Connecticut 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