Dr. Lawrence Chin-I An, MD
- Medicare services, 2024
- 43
- Medicare patients, 2024
- 40
- Part D claims, 2024
- 73
- Publications
- 76
- Hospital affiliations
- 1
- Practice address
- 1500 E Medical Center Dr, Ann Arbor, MI 48109
- Practice phone
- Call (734) 936-4000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
University Hospital
School-Based Health Center · Ann Arbor, Michigan
Find Dr. An'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. Lawrence Chin-I An is an internist in Ann Arbor, Michigan
Dr. An practices at University Hospital in Ann Arbor, Michigan.
Dr. An's NPI, 1003850611, was assigned on June 15, 2006. Dr. An graduated from University of Michigan Medical School in 1991. Dr. An holds Michigan license 4301057790.
- NPI
- 1003850611NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0446443147
- NPI enumeration date
- June 15, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (734) 936-4000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 61
- Medical school graduation
- 1991
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Lawrence Chin-I An practices at University Hospital in Ann Arbor, Michigan
Dr. An's primary practice is University Hospital, at 1500 E Medical Center Dr, Ann Arbor, MI 48109. The practice phone is (734) 936-4000.
- University Hospital1500 E Medical Center Dr, Ann Arbor, MI 48109Phone(734) 936-4000
Source: Dmand AI Affiliation Data
Dr. Lawrence Chin-I An is affiliated with 2 sites of care and 1 medical group
Dr. An's primary practice is University Hospital in Ann Arbor, Michigan. Dr. An is also affiliated with University Hospital. The medical group on file is University of Michigan Health. Dr. An's employer is on file too: a school & student health.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Lawrence Chin-I An's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. An practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| University Hospital | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Lawrence Chin-I An is one of 4,804 internists in Michigan
Internal medicine is Dr. An's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dmand AI has Dr. An's licenses on file in 2 states: Michigan and Minnesota.
Specialties and state licenses
- Internal medicine, MichiganPrimary
- Minnesota license
Internists near Dr. An
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. Lawrence Chin-I An billed Medicare for 43 services in 2024
CMS data shows 43 Medicare services from Dr. An across 2 procedure codes in 2024, all of them office visits, for 40 Medicare patients. Medicare paid $2,137 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. An's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 582024: 4326%
Dr. An compared with the Michigan median for internists, 2024
- Dr. An
- Michigan median
- Medicare services
- 43vs 42390% below
- Medicare patients
- 40vs 15975% below
- Part D claims
- 20vs 31494% below
Medians across 4,524 internists in Michigan with Dmand AI profiles that report each measure.
Dr. An'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. An and other internists in Michigan.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Lawrence Chin-I An treated 40 Medicare patients in 2024, average age 67
CMS counts 40 Medicare patients who saw Dr. An in 2024. The largest group is 65 to 74, with 18 patients. 63% of them have high blood pressure, and 43% have high cholesterol. 30% are also on Medicaid. Their average risk score is 1.64, 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. An's median patient age at 53, with 45% women.
Dr. An's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. An's Medicare patients by sex, 2024
- Women2153%
- Men1948%
Chronic conditions among Dr. An's Medicare patients, 2024
- High blood pressure63%
- High cholesterol43%
- Anxiety38%
- Diabetes38%
- Arthritis35%
- Depression28%
- Mood disorders28%
Share of Medicare patients with each condition. A patient can have several.
Dr. An's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 53
Patient panel by sex, all payers
- Women45%
- Men53%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Lawrence Chin-I An wrote 73 Medicare Part D claims in 2024
In 2024, Dr. An wrote 73 Medicare Part D claims for 31 patients. 84% of them were for generic drugs. CMS names the drug for 20 of them, across 1 drug with 11 or more claims each, at $4,308 in total drug cost. In 2022, CMS named 15 claims across 1 drug.
Dr. An's Part D claims by kind of drug, 2024
- Generic61 claims84%
- Brand-name12 claims16%
Dr. An's most prescribed drugs by claims, 2023
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2022 to 2023
- 2022
- 2023
- Claims for drugs CMS names
- 2022: 152023: 2033%
Drugs named by CMS: 1 in 2023, 1 in 2022.
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. Lawrence Chin-I An offers telehealth to Medicare patients
Dr. An accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. An as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Lawrence Chin-I An has 76 publications on record
Dmand AI links 76 papers to Dr. An, published from 2010 to 2025. 2018 was the busiest year, with 6. The most frequent topics are Smoking Cessation, Smoking and Internet. Dr. An has published most often in JMIR Res Protoc. Dr. An's most frequent co-authors are Kevin Anthony Kerber, MD, David A. Hanauer, MD and Lewis B. Morgenstern, MD.
Dr. An's papers by year, 2016 to 2025
Topics Dr. An writes about most
- Smoking Cessation
- Smoking
- Internet
- COVID-19
- Motivation
- Breast Neoplasms
- Health Behavior
- Pilot Projects
Dr. An's most frequent co-authors
- Kevin Anthony Kerber, MD5 shared papers
- David A. Hanauer, MD4 shared papers
- Lewis B. Morgenstern, MD4 shared papers
Recent publications by Dr. An
See who Dr. An researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. An 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. Lawrence Chin-I An graduated from University of Michigan Medical School
Dr. An graduated from University of Michigan Medical School in 1991.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Lawrence Chin-I An'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) |
| 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. Lawrence Chin-I An
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. Lawrence Chin-I An's NPI number?
Dr. Lawrence Chin-I An's NPI number is 1003850611. It was assigned on June 15, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Lawrence Chin-I An?
Dr. Lawrence Chin-I An is an internist in Ann Arbor, Michigan. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Lawrence Chin-I An practice?
Dr. An practices at 1500 E Medical Center Dr, Ann Arbor, MI 48109. Dr. An's primary practice is University Hospital in Ann Arbor, Michigan.
What is Dr. Lawrence Chin-I An's office phone number?
The practice phone on file for Dr. An is (734) 936-4000.
What is Dr. Lawrence Chin-I An's medical license number?
Dr. An holds Michigan license 4301057790, one of the licenses on file in 2 states.
Which states has Dr. Lawrence Chin-I An been licensed in?
Dmand AI has state licenses on file for Dr. An in Michigan and Minnesota.
Which hospitals is Dr. Lawrence Chin-I An affiliated with?
Dr. An is affiliated with University Hospital.
What medical group is Dr. Lawrence Chin-I An part of?
Dr. An is linked to University of Michigan Health.
Does Dr. Lawrence Chin-I An accept Medicare?
Yes. CMS data shows Dr. An billed Medicare for 43 services in 2024, and Dr. An accepts Medicare assignment.
Does Dr. Lawrence Chin-I An offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. An as offering telehealth services.
Show 7 more questionsShow fewer questions
How many Medicare patients does Dr. Lawrence Chin-I An see?
CMS counts 40 Medicare patients who saw Dr. An in 2024, with an average age of 67.
What services does Dr. Lawrence Chin-I An bill to Medicare?
In 2024, Dr. An's most billed Medicare services were office visit, established patient (99213) and office visit, established patient (99214).
Where did Dr. Lawrence Chin-I An go to medical school?
Dr. An graduated from University of Michigan Medical School in 1991.
What drugs does Dr. Lawrence Chin-I An prescribe most?
In 2023 Medicare Part D data, Dr. An's most prescribed drugs by claims were Gentamicin Sulfate.
How long has Dr. Lawrence Chin-I An been practicing?
Dr. An graduated from medical school in 1991, 35 years ago.
Does Dr. Lawrence Chin-I An do research?
Dmand AI links 76 publications to Dr. An, published from 2010 to 2025.
Who does Dr. Lawrence Chin-I An publish with?
Dr. An's most frequent co-authors are Kevin Anthony Kerber, MD (5 shared papers), David A. Hanauer, MD (4 shared papers) and Lewis B. Morgenstern, MD (4 shared papers).
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