Dr. Martin J. Frey, MD

  • Wausau, WI
  • Cardiologist
NPI1164424719PAC ID3476695701
Medicare services, 2024
693
Medicare patients, 2024
350
Part D claims, 2024
144
Publications
42
MIPS score, 2024
90
Practice address
333 Pine Ridge Blvd, Wausau, WI 54401
Practice phone
Call (715) 847-2000
Professional email
Get professional email
Personal email
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Mobile number
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Social profiles

Primary practice

Aspirus Wausau Hospital

Hospital · Wausau, Wisconsin

See all 11 affiliations

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Dr. Martin J. Frey is a cardiologist in Wausau, Wisconsin

Dr. Frey practices at Aspirus Wausau Hospital in Wausau, Wisconsin, part of Aspirus.

Dr. Frey's NPI, 1164424719, was assigned on August 12, 2005. Dr. Frey graduated from George Washington University School of Medicine and Health Sciences in 1983. Dr. Frey holds Florida license ME55273.

NPI and contact details
Medicare PAC ID
3476695701
NPI enumeration date
August 12, 2005
NPI status
Active
Accepts Medicare assignment
Yes
Practice phone
(715) 847-2000
Professional email
Get email
Personal email
Get email
Mobile number
Get number
Sex
Male
Estimated age
69
Medical school graduation
1983

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

Dr. Martin J. Frey practices at Aspirus Wausau Hospital in Wausau, Wisconsin

Dr. Frey's primary practice is Aspirus Wausau Hospital, at 333 Pine Ridge Blvd, Wausau, WI 54401 in Marathon County. The practice phone is (715) 847-2000.

Source: Dmand AI Affiliation Data

Dr. Martin J. Frey is affiliated with 5 sites of care and 6 medical groups

Dr. Frey's primary practice is Aspirus Wausau Hospital in Wausau, Wisconsin, part of Aspirus. Dr. Frey is also affiliated with UnityPoint Health - Iowa Methodist Medical Center. The medical group on file is Aspirus Medical Group. Dmand AI also links Dr. Frey to 2 more hospitals, 5 medical groups and 1 group practice or clinic, each named with a free account.

See all 11 affiliations for Dr. Frey

Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data

Dmand AI tracks the EHR system at Dr. Martin J. Frey's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Frey practices, 5 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
Aspirus Wausau HospitalAvailable with a free account
+4 more sites and 5 medical groupsAvailable with a free account

Source: Dmand AI Technology Install Data

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Dr. Martin J. Frey is one of 354 cardiologists in Wisconsin

Cardiovascular disease is Dr. Frey's primary specialty in the NPI Registry, under taxonomy code 207RC0000X. Dr. Frey is board certified in cardiovascular disease by the American Board of Internal Medicine. Dmand AI has Dr. Frey's licenses on file in 6 states: Florida, Georgia, North Dakota, Oregon, Maryland and Pennsylvania.

Specialties and state licenses

  • Cardiovascular disease, FloridaPrimaryLicense ME55273 · 1989 to 2026 · taxonomy 207RC0000X
  • Georgia license2024 to 2026
  • North Dakota license2024 to 2026
  • Oregon license2024 to 2025
  • Maryland license2012 to 2014
  • Pennsylvania license1986 to 1988

Clinical focus

Dmand AI lists atrial fibrillation and flutter, cardiomyopathy, cerebrovascular disease, chronic hypertension, coronary artery disease, heart failure, heart valve disorders and intermittent racing heartbeat (PSVT) among the conditions Dr. Frey treats.

Cardiologists near Dr. Frey

Counts of cardiologists 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. Martin J. Frey billed Medicare for 693 services in 2024

CMS data shows 693 Medicare services from Dr. Frey across 12 procedure codes in 2024, for 350 Medicare patients. Medicare paid $29,806 for them. Every service was in a facility, such as a hospital, rather than an office.

Medicare services, 2024693
Medicare patients350
Paid by Medicare$29,806
Procedure codes12

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

  • 2023
  • 2024
Tests and treatments
2023: 1562024: 394153%
Office and hospital visits
2023: 5762024: 25955%
Imaging
2023: 732024: 4045%

Dr. Frey compared with the Wisconsin median for cardiologists, 2024

  • Dr. Frey
  • Wisconsin median
Medicare services
693vs 1,12438% below
Medicare patients
350vs 79256% below
Part D claims
68vs 1,15494% below

Medians across 359 cardiologists in Wisconsin with Dmand AI profiles that report each measure.

Dr. Frey'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. Frey

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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Frey and other cardiologists in Wisconsin.

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

Dr. Martin J. Frey treated 350 Medicare patients in 2024, average age 77

CMS counts 350 Medicare patients who saw Dr. Frey in 2024. The largest group is 75 to 84, with 110 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 32% are also on Medicaid. Their average risk score is 2.82, 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. Frey's median patient age at 73, with 46% women.

Medicare patients, 2024350
Average age77
Average risk score2.82
Also on Medicaid32%

Dr. Frey's Medicare patients by age, 2024

Dr. Frey's Medicare patients by sex, 2024

  • Women17851%
  • Men17249%

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

  1. High blood pressure75%
  2. High cholesterol75%
  3. Heart failure65%
  4. Ischemic heart disease62%
  5. Arthritis57%
  6. Chronic kidney disease54%
  7. Atrial fibrillation50%
  8. Diabetes49%

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

Dr. Frey's patients across all payers

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

Patient panel by age, all payers

Median age 73

Patient panel by sex, all payers

  • Women46%
  • Men54%

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

Dr. Martin J. Frey wrote 144 Medicare Part D claims in 2024

In 2024, Dr. Frey wrote 144 Medicare Part D claims for 34 patients. 80% of them were for generic drugs. CMS names the drug for 68 of them, across 4 drugs with 11 or more claims each, at $219 in total drug cost. In 2023, CMS named 179 claims across 10 drugs.

Part D claims, 2024144
Drugs named by CMS4
Total drug cost$219
Part D patients34

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

  • Generic115 claims80%
  • Brand-name29 claims20%

Dr. Frey'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.

Part D claims for drugs CMS names, 2023 to 2024

  • 2023
  • 2024
Claims for drugs CMS names
2023: 1792024: 6862%

Drugs named by CMS: 4 in 2024, 10 in 2023.

See all prescribing by Dr. Frey

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. Martin J. Frey scored 90 out of 100 in Medicare's MIPS program for 2024

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 90 out of 100 for Dr. Frey for performance year 2024, reported as part of a group. Dr. Frey accepts Medicare assignment, so Medicare's approved amount is taken as full payment.

Accepts Medicare assignment
Yes

Dr. Frey's MIPS scores, performance year 2024

  • 90of 100Final score
  • 89.4of 100Quality
  • 100of 100Promoting Interoperability
  • 40of 100Improvement Activities
  • 76of 100Cost

Each score is out of 100. The final score weighs the categories CMS scored for this clinician.

Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026

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Dr. Martin J. Frey has 42 publications on record

Dmand AI links 42 papers to Dr. Frey, published from 2004 to 2020. 2017 was the busiest year, with 4. The most frequent topics are Pulmonary Disease, Chronic Obstructive, Switzerland and Disease Progression. Dr. Frey has published most often in Eur Respir J. Dr. Frey's most frequent co-authors are Sarah E. Chesrown, MD, Thomas A. Holly, MD and Stephen C. Lazarus, MD.

Papers42
Years published2004 to 2020

Dr. Frey's papers by year, 2008 to 2020

Topics Dr. Frey writes about most

  • Pulmonary Disease, Chronic Obstructive
  • Switzerland
  • Disease Progression
  • Exercise Tolerance
  • Exercise
  • Forced Expiratory Volume
  • Lung
  • Respiratory Function Tests

Dr. Frey's most frequent co-authors

Recent publications by Dr. Frey

See all 42 publications and co-authors

See who Dr. Frey researches with

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

How network discovery works

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

Dr. Martin J. Frey received $8,246 in industry payments from 2016 to 2025

CMS Open Payments shows 222 general payments to Dr. Frey from 42 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 99% of the total. Medtronic, Inc. paid the most, $2,143.

General payments to Dr. Frey by program year, 2016 to 2025

General payments to Dr. Frey by kind, 2016 to 2025

$8.2Kin total
  • Food and beverage$8,13499%
  • Education$1121%

Companies that paid Dr. Frey the most, 2016 to 2025

Share is of all general payments to this clinician.

See all payments to Dr. Frey

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

Dr. Martin J. Frey graduated from George Washington University School of Medicine and Health Sciences

Dr. Frey graduated from George Washington University School of Medicine and Health Sciences in 1983.

  1. Medical schoolGeorge Washington University School of Medicine and Health Sciences
  2. Board certified in cardiovascular diseaseAmerican Board of Internal Medicine
  3. Board certified in internal medicineAmerican Board of Internal Medicine

Source: Dmand AI Professional Profile Data

Dr. Martin J. Frey accepts plans from 14 insurance carriers

Dr. Frey is in network with 14 carriers, including Aetna, Elevance and Excellus BlueCross BlueShield. Medicare plans come from the most carriers, 12. Check the plan with the practice before a visit.

  • Aetna
  • Elevance
  • Excellus BlueCross BlueShield
  • Blue Cross Blue Shield of Michigan
  • HCSC
  • United Healthcare
  • Blue Cross Blue Shield of North Dakota
  • Cigna
  • +6 more carriersWith a free account

Plan types Dr. Frey accepts, by number of carriers

  1. Medicare12
  2. PPO11
  3. HMO8
  4. POS6
  5. EPO4
  6. Medicaid1

Source: Dmand AI Insurance Network Data

Sources for Dr. Martin J. Frey'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 phoneDmand AI Affiliation Data
Primary practice, affiliations and health systemDmand 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)Clinician Public Reporting: Overall MIPS Performance (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)
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. Martin J. Frey

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. Martin J. Frey's NPI number?

Dr. Martin J. Frey's NPI number is 1164424719. It was assigned on August 12, 2005, and it is active in the NPI Registry.

What kind of doctor is Dr. Martin J. Frey?

Dr. Martin J. Frey is a cardiologist in Wausau, Wisconsin. The primary specialty in the NPI Registry is Cardiovascular Disease Physician (taxonomy code 207RC0000X).

Where does Dr. Martin J. Frey practice?

Dr. Frey practices at 333 Pine Ridge Blvd, Wausau, WI 54401. Dr. Frey's primary practice is Aspirus Wausau Hospital in Wausau, Wisconsin, part of Aspirus. Dmand AI also links Dr. Frey to 2 hospitals, 5 medical groups and 1 group practice or clinic.

What is Dr. Martin J. Frey's office phone number?

The practice phone on file for Dr. Frey is (715) 847-2000.

What is Dr. Martin J. Frey's medical license number?

Dr. Frey holds Florida license ME55273, one of the licenses on file in 6 states.

Which states has Dr. Martin J. Frey been licensed in?

Dmand AI has state licenses on file for Dr. Frey in Florida (1989 to 2026), Georgia (2024 to 2026), North Dakota (2024 to 2026), Oregon (2024 to 2025), Maryland (2012 to 2014) and Pennsylvania (1986 to 1988).

Which hospitals is Dr. Martin J. Frey affiliated with?

Dr. Frey practices at Aspirus Wausau Hospital in Wausau, Wisconsin. Dr. Frey is also affiliated with UnityPoint Health - Iowa Methodist Medical Center. Dmand AI links Dr. Frey to 2 more hospitals.

What medical group is Dr. Martin J. Frey part of?

Dr. Frey is linked to Aspirus Medical Group. Dmand AI links Dr. Frey to 5 more medical groups.

Does Dr. Martin J. Frey accept Medicare?

Yes. CMS data shows Dr. Frey billed Medicare for 693 services in 2024, and Dr. Frey accepts Medicare assignment.

What is Dr. Martin J. Frey's MIPS score?

Dr. Frey's MIPS final score for performance year 2024 is 90 out of 100, reported as part of a group.

Show 10 more questionsShow fewer questions

How many Medicare patients does Dr. Martin J. Frey see?

CMS counts 350 Medicare patients who saw Dr. Frey in 2024, with an average age of 77.

Is Dr. Martin J. Frey board certified?

Yes. Dr. Frey is board certified in cardiovascular disease by the American Board of Internal Medicine.

What services does Dr. Martin J. Frey bill to Medicare?

In 2024, Dr. Frey's most billed Medicare services were heart test or procedure (93306), heart test or procedure (93010) and hospital inpatient care (99231).

Where did Dr. Martin J. Frey go to medical school?

Dr. Frey graduated from George Washington University School of Medicine and Health Sciences in 1983.

What drugs does Dr. Martin J. Frey prescribe most?

In 2024 Medicare Part D data, Dr. Frey's most prescribed drugs by claims were Atorvastatin Calcium, Hydrochlorothiazide and Losartan Potassium.

Has Dr. Martin J. Frey received payments from drug or device companies?

CMS Open Payments shows $8,246 in general payments to Dr. Frey from 42 companies from 2016 to 2025. The largest total came from Medtronic, Inc.

How long has Dr. Martin J. Frey been practicing?

Dr. Frey graduated from medical school in 1983, 43 years ago.

Does Dr. Martin J. Frey do research?

Dmand AI links 42 publications to Dr. Frey, published from 2004 to 2020.

Who does Dr. Martin J. Frey publish with?

Dr. Frey's most frequent co-authors are Sarah E. Chesrown, MD (1 shared paper), Thomas A. Holly, MD (1 shared paper) and Stephen C. Lazarus, MD (1 shared paper).

What insurance does Dr. Martin J. Frey accept?

Dr. Frey is in network with 14 carriers, including Aetna, Elevance and Excellus BlueCross BlueShield. Medicare plans come from the most carriers, 12. Check the plan with the practice before a visit.

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