Dr. Mark Marshall Millar, MD

  • Grand Rapids, MI
  • Allergist and immunologist
NPI1962627802PAC ID3779543160
Medicare services, 2024
2,350
Medicare patients, 2024
124
Part D claims, 2024
2,498
Publications
3
Hospital affiliations
2
Practice address
1179 E Paris SE Ave, Grand Rapids, MI 49546
Practice phone
Call (616) 957-1912
Professional email
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Personal email
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Mobile number
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Social profiles

Primary practice

Allergy & Asthma Care of W Mi

Grand Rapids, Michigan

See all 4 affiliations

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Dr. Mark Marshall Millar is an allergist and immunologist in Grand Rapids, Michigan

Dr. Millar practices at Allergy & Asthma Care of W Mi in Grand Rapids, Michigan.

Dr. Millar's NPI, 1962627802, was assigned on April 16, 2007. Dr. Millar graduated from Feinberg School of Medicine in 1993. Dr. Millar holds Michigan license 4301071401.

NPI and contact details
Medicare PAC ID
3779543160
NPI enumeration date
April 16, 2007
NPI status
Active
Accepts Medicare assignment
Yes
Practice phone
(616) 957-1912
Professional email
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Personal email
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Mobile number
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Sex
Male
Estimated age
59
Medical school graduation
1993

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)

Dr. Mark Marshall Millar practices at Allergy & Asthma Care of W Mi in Grand Rapids, Michigan

Dr. Millar's primary practice is Allergy & Asthma Care of W Mi, at 1179 E Paris SE Ave, Grand Rapids, MI 49546 in Kent County. The practice phone is (616) 957-1912.

  • Allergy & Asthma Care of W Mi
    1179 E Paris SE Ave, Grand Rapids, MI 49546 · Kent CountyPhone(616) 957-1912

Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data

Dr. Mark Marshall Millar is affiliated with 4 sites of care

Dr. Millar's primary practice is Allergy & Asthma Care of W Mi in Grand Rapids, Michigan. Dr. Millar is also affiliated with Corewell Health Grand Rapids Hospitals - Butterworth. Dmand AI also links Dr. Millar to 1 more hospital and 1 physician office, each named with a free account.

See all 4 affiliations for Dr. Millar

Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data

Dmand AI tracks the EHR system at Dr. Mark Marshall Millar's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Millar practices, 3 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
Allergy & Asthma Care of W MiAvailable with a free account
+3 more affiliated sitesAvailable with a free account

Source: Dmand AI Technology Install Data

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Dr. Mark Marshall Millar is one of 118 allergists and immunologists in Michigan

Allergy and immunology is Dr. Millar's primary specialty in the NPI Registry, under taxonomy code 207K00000X. Dr. Millar is board certified in allergy & immunology by the American Board of Allergy and Immunology. Dmand AI has Dr. Millar's licenses on file in 2 states: Michigan and Illinois.

Specialties and state licenses

  • Allergy and immunology, MichiganPrimaryLicense 4301071401 · 1997 to 2026 · taxonomy 207K00000X
  • Illinois license1993 to 2005

Clinical focus

Dmand AI lists asthma, chronic nasal allergies and hives among the conditions Dr. Millar treats.

Allergists and immunologists near Dr. Millar

Counts of allergists and immunologists 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. Mark Marshall Millar billed Medicare for 2,350 services in 2024

CMS data shows 2,350 Medicare services from Dr. Millar across 8 procedure codes in 2024, for 124 Medicare patients. Medicare paid $19,683 for them. Every service was in an office.

Medicare services, 20242,350
Medicare patients124
Paid by Medicare$19,683
Procedure codes8

Dr. Millar's Medicare services by type, 2023 to 2024

  • 2023
  • 2024
Tests and treatments
2023: 1,5662024: 2,21942%
Office and hospital visits
2023: 1212024: 1318%

Dr. Millar compared with the Michigan median for allergists and immunologists, 2024

  • Dr. Millar
  • Michigan median
Medicare services
2,350vs 1,0062.3 times
Medicare patients
124vs 10419% above
Part D claims
2,374vs 3846.2 times

Medians across 120 allergists and immunologists in Michigan with Dmand AI profiles that report each measure.

Dr. Millar'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.

See all procedures by Dr. Millar

Need commercial claims for Dr. Millar?

Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Millar and other allergists and immunologists in Michigan.

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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks

Dr. Mark Marshall Millar treated 124 Medicare patients in 2024, average age 69

CMS counts 124 Medicare patients who saw Dr. Millar in 2024. The largest group is 65 to 74, with 71 patients. 64% of them have high cholesterol, and 59% have high blood pressure. 13% are also on Medicaid. Their average risk score is 0.96, where 1.00 is the Medicare average.

Across all payers, Dmand AI patient panel data puts Dr. Millar's median patient age at 42, with 62% women.

Medicare patients, 2024124
Average age69
Average risk score0.96
Also on Medicaid13%

Dr. Millar's Medicare patients by age, 2024

CMS leaves out age groups with fewer than 11 patients.

Dr. Millar's Medicare patients by sex, 2024

  • Women7964%
  • Men4536%

Chronic conditions among Dr. Millar's Medicare patients, 2024

  1. High cholesterol64%
  2. High blood pressure59%
  3. Arthritis53%
  4. Asthma39%
  5. Mood disorders30%
  6. Anxiety25%
  7. Depression23%
  8. Diabetes20%

Share of Medicare patients with each condition. A patient can have several.

Dr. Millar's patients across all payers

Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.

Patient panel by age, all payers

Median age 42

Patient panel by sex, all payers

  • Women62%
  • Men38%

Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data

Dr. Mark Marshall Millar wrote 2,498 Medicare Part D claims in 2024

In 2024, Dr. Millar wrote 2,498 Medicare Part D claims for 407 patients. 78% of them were for generic drugs. CMS names the drug for 2,374 of them, across 28 drugs with 11 or more claims each, at $280,548 in total drug cost. In 2023, CMS named 2,325 claims across 28 drugs.

Part D claims, 20242,498
Drugs named by CMS28
Total drug cost$280,548
Part D patients407

Dr. Millar's Part D claims by kind of drug, 2024

  • Generic1,936 claims78%
  • Brand-name562 claims22%

Dr. Millar'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. Millar's Part D claims, 2024

  • Antibiotics3%69 of 2,498 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: 2,3252024: 2,3742%

Drugs named by CMS: 28 in 2024, 28 in 2023.

See all prescribing by Dr. Millar

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

How Dr. Mark Marshall Millar takes part in Medicare

Dr. Millar accepts Medicare assignment, so Medicare's approved amount is taken as full payment.

Accepts Medicare assignment
Yes

Source: Doctors and Clinicians National Downloadable File (CMS)

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Dr. Mark Marshall Millar has 3 publications on record

Dmand AI links 3 papers to Dr. Millar. Dr. Millar has published most often in Ann Allergy Asthma Immunol. Dr. Millar's most frequent co-author is Kris G. McGrath, MD.

Papers3

Dr. Millar's most frequent co-authors

  • Kris G. McGrath, MD1 shared paper

Recent publications by Dr. Millar

See all 3 publications and co-authors

See who Dr. Millar researches with

Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Millar works with, so you can find a warm path to the right allergists and immunologists.

How network discovery works

Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage

Dr. Mark Marshall Millar received $239 in industry payments from 2017 to 2025

CMS Open Payments shows 17 general payments to Dr. Millar from 3 drug and device companies from 2017 to 2025. Food and beverage make up the largest share, 83% of the total. Novartis Pharmaceuticals Corporation paid the most, $199.

General payments to Dr. Millar by program year, 2017 to 2025

General payments to Dr. Millar by kind, 2017 to 2025

$239in total
  • Food and beverage$19983%
  • Education$4017%

Companies that paid Dr. Millar the most, 2017 to 2025

Share is of all general payments to this clinician.

See all payments to Dr. Millar

Source: Open Payments (CMS), 2025 data, released July 7, 2026

Dr. Mark Marshall Millar has 3 awards and honors on record

Dmand AI lists 3 awards for Dr. Millar, most recently Regional Top Doctor in 2014.

Awards and honors for Dr. Millar

  1. 2014
    • Regional Top Doctor
  2. Undated
    • AAAAI Fellow
    • Fellow (FACAAI)

Source: Dmand AI Professional Profile Data

Dr. Mark Marshall Millar graduated from Feinberg School of Medicine

Dr. Millar graduated from Feinberg School of Medicine in 1993. Dr. Millar is a member of AAAAI and ACP.

  1. Medical schoolFeinberg School of Medicine
  2. Board certified in allergy & immunologyAmerican Board of Allergy and Immunology

Source: Dmand AI Professional Profile Data

Dr. Mark Marshall Millar accepts plans from 18 insurance carriers

Dr. Millar is in network with 18 carriers, including Aetna, Health Alliance Plan and Priority Health. PPO plans come from the most carriers, 12. Check the plan with the practice before a visit.

Plan types Dr. Millar accepts, by number of carriers

  1. PPO12
  2. Medicare11
  3. HMO10
  4. EPO5
  5. POS5
  6. Medicaid3

Source: Dmand AI Insurance Network Data

Sources for Dr. Mark Marshall Millar's profile data

Sources for the data on this page
Data on this pageSource
NPI, name, sex, specialty and licensesNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data
Practice locations and phoneNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data
Primary practice, affiliations and health systemNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation DataDmand AI Org Hierarchy Data
Medicare services and procedure codesMedicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab)
State medians for the same specialtyDmand AI Peer Benchmarks
Medicare patients and the all-payer patient panelDmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab)
Part D prescribingMedicare 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 percentilesDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)
Publications, topics and co-authorsPubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage
Industry paymentsOpen Payments (CMS) (opens in a new tab)
Awards and committee rolesDmand AI Professional Profile Data
Training, board certification and membershipsDmand AI Professional Profile Data
Insurance carriers and plan typesDmand AI Insurance Network Data
EHR at each practice siteDmand AI Technology Install Data
Similar physiciansDmand AI Affiliation Data

Data last refreshed October 2026Report an inaccuracyRemove my information

FAQ

Frequently asked questions about Dr. Mark Marshall Millar

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. Mark Marshall Millar's NPI number?

Dr. Mark Marshall Millar's NPI number is 1962627802. It was assigned on April 16, 2007, and it is active in the NPI Registry.

What kind of doctor is Dr. Mark Marshall Millar?

Dr. Mark Marshall Millar is an allergist and immunologist in Grand Rapids, Michigan. The primary specialty in the NPI Registry is Allergy & Immunology Physician (taxonomy code 207K00000X).

Where does Dr. Mark Marshall Millar practice?

Dr. Millar practices at 1179 E Paris SE Ave, Grand Rapids, MI 49546. Dr. Millar's primary practice is Allergy & Asthma Care of W Mi in Grand Rapids, Michigan. Dmand AI also links Dr. Millar to 1 hospital and 1 physician office.

What is Dr. Mark Marshall Millar's office phone number?

The practice phone on file for Dr. Millar is (616) 957-1912.

What is Dr. Mark Marshall Millar's medical license number?

Dr. Millar holds Michigan license 4301071401, one of the licenses on file in 2 states.

Which states has Dr. Mark Marshall Millar been licensed in?

Dmand AI has state licenses on file for Dr. Millar in Michigan (1997 to 2026) and Illinois (1993 to 2005).

Which hospitals is Dr. Mark Marshall Millar affiliated with?

Dr. Millar is affiliated with Corewell Health Grand Rapids Hospitals - Butterworth. Dmand AI links Dr. Millar to 1 more hospital.

Does Dr. Mark Marshall Millar accept Medicare?

Yes. CMS data shows Dr. Millar billed Medicare for 2,350 services in 2024, and Dr. Millar accepts Medicare assignment.

How many Medicare patients does Dr. Mark Marshall Millar see?

CMS counts 124 Medicare patients who saw Dr. Millar in 2024, with an average age of 69.

Is Dr. Mark Marshall Millar board certified?

Yes. Dr. Millar is board certified in allergy & immunology by the American Board of Allergy and Immunology.

Show 8 more questionsShow fewer questions

What services does Dr. Mark Marshall Millar bill to Medicare?

In 2024, Dr. Millar's most billed Medicare services were allergy test or treatment (95004), allergy test or treatment (95165) and allergy test or treatment (95117).

Where did Dr. Mark Marshall Millar go to medical school?

Dr. Millar graduated from Feinberg School of Medicine in 1993.

What drugs does Dr. Mark Marshall Millar prescribe most?

In 2024 Medicare Part D data, Dr. Millar's most prescribed drugs by claims were Levocetirizine Dihydrochloride, Azelastine HCl and Montelukast Sodium.

Has Dr. Mark Marshall Millar received payments from drug or device companies?

CMS Open Payments shows $239 in general payments to Dr. Millar from 3 companies from 2017 to 2025. The largest total came from Novartis Pharmaceuticals Corporation.

How long has Dr. Mark Marshall Millar been practicing?

Dr. Millar graduated from medical school in 1993, 33 years ago.

Does Dr. Mark Marshall Millar do research?

Dmand AI links 3 publications to Dr. Millar.

Who does Dr. Mark Marshall Millar publish with?

Dr. Millar's most frequent co-authors are Kris G. McGrath, MD (1 shared paper).

What insurance does Dr. Mark Marshall Millar accept?

Dr. Millar is in network with 18 carriers, including Aetna, Health Alliance Plan and Priority Health. PPO plans come from the most carriers, 12. Check the plan with the practice before a visit.

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