NPPES file of Aug 9, 2026

Adam Douglas Marks, M.D.

Hospice and Palliative Medicine (Internal Medicine) Physician · Ann Arbor, MI

Adam Douglas Marks, M.D. is a hospice and palliative medicine (internal medicine) physician with a practice address in Ann Arbor, Michigan, and NPI 1265639025, issued on Jun 27, 2007. Check the license (Michigan 4301090107, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1265639025
Name
Adam Douglas Marks
Credential
M.D.
Primary taxonomy
Hospice and Palliative Medicine (Internal Medicine) Physician 207RH0002X
License number
4301090107 MI
Self-reported in NPPES; status is on the state search
Practice location
4260 Plymouth Road, Ann Arbor, MI 48109
Phone
(734) 764-6831
Enumerated
Jun 27, 2007
Record last updated
Jun 9, 2025
Medicare enrollment
Enrolled (PECOS I20121010000317); accepts Medicare assignment
Medical or professional school
University Of Wisconsin School Of Medicine, 2007
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest hospice and palliative medicine (internal medicine) physician records → All 68 in Michigan → Look up another NPI →

Also registered at 4260 Plymouth Road

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Roger Albin, MDNeurology Physician1568551422
  2. Nancy Barbas, MDNeurology Physician1912096876
  3. Rabeya Begum, D.O.Geriatric Medicine (Internal Medicine) Physician1285023721
  4. Julia Chen, M.D.Internal Medicine Physician1790959492
  5. Karen Digby, N.P.Nurse Practitioner1518056316
  6. Heba Gad, M.D.Geriatric Psychiatry Physician1669633731

Verify Adam Douglas Marks in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
    Search for license 4301090107    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Michigan license search

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62% fewer Medicare Part D claims than the average hospice and palliative medicine (internal medicine) physician in 2024

284 Medicare Part D claims for 70 beneficiaries, against an average of 741 among the 1,607 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 15 claims were for opioids.

  1. Adam Marks284
  2. Specialty average741

Most prescribed

  1. Levothyroxine Sodium19 claims
  2. Amlodipine Besylate18 claims
  3. Donepezil Hcl14 claims
  4. Lisinopril13 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.

Bills Medicare through one group practice

  1. 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).

Adam Douglas Marks among 68 hospice and palliative medicine (internal medicine) physician records in Michigan

Adam Douglas Marks, M.D. is one of 68 hospice and palliative medicine (internal medicine) physician records with a practice address in Michigan. 85% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 22% of them.

  • NPI issued2007 · 22% of these records are older, 63% newer
  • In a Medicare fileYes · 85% of these records are
  • In the CMS Doctors and Clinicians fileYes · 75% of these records are
  • Graduated2007 · median 2013 among the 51 with a school on file
  • Record last updated2025 · 31% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0002X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Hospice and Palliative Medicine (Internal Medicine) Physician providers in Michigan

There are 68 hospice and palliative medicine (internal medicine) physician records in Michigan.

All 68 in Michigan → Every provider in Ann Arbor → Hospice and Palliative Medicine (Internal Medicine) Physician nationwide →

The 8 hospice and palliative medicine (internal medicine) physician records with the nearest ZIP codes

  1. Ellen Hummel, M.D.Ann Arbor, MI 481091295797959
  2. Jayme Laurencelle, MDAnn Arbor, MI 481091225419518
  3. Victoria Powell, M.D.Ann Arbor, MI 481091750709309
  4. Maria Silveira, MDAnn Arbor, MI 481091689751471
  5. Darrell Craig, MDAnn Arbor, MI 481051285643817
  6. Shaz Anwar, D.O.Ann Arbor, MI 481031124415344
  7. Victoria Tarazi, MDAnn Arbor, MI 481031730455080
  8. Stuart Vanderheide, MDAnn Arbor, MI 481031619990819

Common questions

What is Adam Douglas Marks, M.D.'s NPI number?

Adam Douglas Marks, M.D.'s National Provider Identifier (NPI) is 1265639025, issued on Jun 27, 2007. An NPI identifies a provider in billing; it is not a license.

Where is Adam Douglas Marks, M.D. located?

The NPPES record lists a practice address at 4260 Plymouth Road, Ann Arbor, MI, 48109. Phone: (734) 764-6831. Providers update this record themselves, so call before visiting.

How can I verify Adam Douglas Marks, M.D.'s license?

NPPES lists Michigan license number 4301090107, 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 Adam Douglas Marks, M.D. prescribe under Medicare Part D?

In 2024, Adam Douglas Marks, M.D. had 284 Medicare Part D claims for 70 beneficiaries; the average among hospice and palliative medicine (internal medicine) physician prescribers was 741. 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.