Lauren Merz, MD
Hematology (Internal Medicine) Physician · Ann Arbor, MI
Lauren Merz, MD is a hematology (internal medicine) physician with a practice address in Ann Arbor, Michigan, and NPI 1073176939, issued on Apr 17, 2019. Check the license (Michigan 4301514172, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- Lauren Merz
- Credential
- MD
- Primary taxonomy
- Hematology (Internal Medicine) Physician 207RH0000X
- License numbers
- 4301514172 MI
280048 MA
Self-reported in NPPES; status is on the state search - Practice location
- 1500 E Medical Center Dr, Ann Arbor, MI 48109
- Phone
- (734) 936-4000
- Enumerated
- Apr 17, 2019
- Record last updated
- Jul 16, 2025
- Medicare enrollment
- Enrolled (PECOS I20250827001322); accepts Medicare assignment
- Medical or professional school
- University Of Michigan Medical School, 2019
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest hematology (internal medicine) physician records → All 57 in Michigan → Look up another NPI →
Also registered at 1500 E Medical Center Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Lauren Merz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license 4301514172Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average hematology (internal medicine) physician in 2024
20 Medicare Part D claims, against an average of 496 among the 1,036 providers of this specialty who prescribed in Part D.
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: $3,270.00
1 payment: consulting fee; the largest payer was Janssen Research & Development, LLC. The 721 providers of this specialty with any payment received $13,778.35 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
- Regents OF The University OF MichiganAnn Arbor, MI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Lauren Merz among 57 hematology (internal medicine) physician records in Michigan
Lauren Merz, MD is one of 57 hematology (internal medicine) physician records with a practice address in Michigan. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 98% of them.
- NPI issued2019 · 98% of these records are older, 0% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 79% of these records are
- Graduated2019 · median 2007 among the 45 with a school on file
- Record last updated2025 · 46% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0000X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology (Internal Medicine) Physician providers in Michigan
There are 57 hematology (internal medicine) physician records in Michigan.
All 57 in Michigan → Every provider in Ann Arbor → Hematology (Internal Medicine) Physician nationwide →
The 8 hematology (internal medicine) physician records with the nearest ZIP codes
- Asra Ahmed, MDAnn Arbor, MI 481091013093079
- Dale Bixby, MDAnn Arbor, MI 481091952423816
- Paula Bockenstedt, MDAnn Arbor, MI 481091366528325
- Erica Campagnaro, MDAnn Arbor, MI 481091891854683
- Mark Chiang, MDAnn Arbor, MI 481091720034986
- Alice Cusick, M.D.Ann Arbor, MI 481091407824154
- Michael Deininger, MDAnn Arbor, MI 481091932115524
- Jennifer Griggs, MD, MPHAnn Arbor, MI 481091700949609
Common questions
What is Lauren Merz, MD's NPI number?
Lauren Merz, MD's National Provider Identifier (NPI) is 1073176939, issued on Apr 17, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Lauren Merz, MD located?
The NPPES record lists a practice address at 1500 E Medical Center Dr, Ann Arbor, MI, 48109. Phone: (734) 936-4000. Providers update this record themselves, so call before visiting.
How can I verify Lauren Merz, MD's license?
NPPES lists Michigan license number 4301514172, 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 Lauren Merz, MD prescribe under Medicare Part D?
In 2024, Lauren Merz, MD had 20 Medicare Part D claims; the average among hematology (internal medicine) physician prescribers was 496. 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.