Lawrence Tyng-Hann Chen, MD
Internal Medicine Physician · Ypsilanti, MI
Lawrence Tyng-Hann Chen, MD is an internal medicine physician with a practice address in Ypsilanti, Michigan, and NPI 1639791916, issued on May 10, 2020. Check the license (Michigan 4301512433, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- Lawrence Tyng-Hann Chen
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 4301512433 MI
4351047189APP20 MI
Self-reported in NPPES; status is on the state search - Practice location
- Iha Hospital Medicine Services, Ypsilanti, MI 48197
- Phone
- (734) 712-8676
- Enumerated
- May 10, 2020
- Record last updated
- Oct 18, 2024
- Fax
- (313) 966-0880
- Medicare enrollment
- Enrolled (PECOS I20241025003157); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 5,735 in Michigan → Look up another NPI →
Also registered at Iha Hospital Medicine Services
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Lawrence Tyng-Hann Chen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license 4301512433Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
94% fewer Medicare Part D claims than the average internal medicine physician in 2024
201 Medicare Part D claims for 50 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 25% of claims.
Most prescribed
- Hydrochlorothiazide14 claims
- Fluticasone Propionate13 claims
- Atorvastatin Calcium12 claims
- Biktarvy11 claims
- Entresto11 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $16.59
1 payment: food and beverage; the largest payer was Pfizer Inc. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Iha Health Services CorporationLivonia, MI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Lawrence Tyng-Hann Chen among 5,735 internal medicine physician records in Michigan
Lawrence Tyng-Hann Chen, MD is one of 5,735 internal medicine physician records with a practice address in Michigan. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2020, is newer than 79% of them.
- NPI issued2020 · 79% of these records are older, 17% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2020 · median 2006 among the 3,564 with a school on file
- Record last updated2024 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
198 internal medicine physician records list a practice address in Ypsilanti
They are 198 of the 3,625 NPPES records with a practice address in Ypsilanti, and 5,735 internal medicine physician records in Michigan.
All 5,735 in Michigan → Every provider in Ypsilanti → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Sabah Al-Attar, M.DYpsilanti, MI 481971285697821
- Imad Ayyar, M.D.Ypsilanti, MI 481971073515268
- Daniel Cahill, M.D.Ypsilanti, MI 481971801897376
- Jack Carman, M.D.Ypsilanti, MI 481971285635474
- John Hopper, MDYpsilanti, MI 481971184680977
- Eugene Liu, M.D.Ypsilanti, MI 481971770584930
- Shyam Mahesh, M.D.Ypsilanti, MI 481971962407569
- Marc Mastropaolo, DOYpsilanti, MI 481971982667002
Common questions
What is Lawrence Tyng-Hann Chen, MD's NPI number?
Lawrence Tyng-Hann Chen, MD's National Provider Identifier (NPI) is 1639791916, issued on May 10, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Lawrence Tyng-Hann Chen, MD located?
The NPPES record lists a practice address at Iha Hospital Medicine Services, Ypsilanti, MI, 48197. Phone: (734) 712-8676. Providers update this record themselves, so call before visiting.
How can I verify Lawrence Tyng-Hann Chen, MD's license?
NPPES lists Michigan license number 4301512433, as entered by the provider. Search the Michigan Board of Medicine (LARA) at https://aca-prod.accela.com/MILARA/GeneralProperty/PropertyLookUp.aspx?isLicensee=Y&TabName=APO. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Lawrence Tyng-Hann Chen, MD prescribe under Medicare Part D?
In 2024, Lawrence Tyng-Hann Chen, MD had 201 Medicare Part D claims for 50 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.