Michael T. Massaro

  • Sacramento, CA
  • Gastroenterologist
NPI1558741447PAC ID4385957661
Medicare services, 2024
722
Medicare patients, 2024
443
Part D claims, 2024
994
Publications
3
MIPS score, 2024
100
Practice address
3941 J Street, Suite 460, Sacramento, CA 95819
Practice phone
Call (916) 733-6940
Professional email
Get professional email
Personal email
Get personal email
Mobile number
Get mobile number
Social profiles

Primary practice

Sacramento Midtown Endoscopy Center

Surgery Center - Medicare-Certified · Sacramento, California

See all 5 affiliations

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Michael T. Massaro is a gastroenterologist in Sacramento, California

Michael Massaro practices at Sacramento Midtown Endoscopy Center in Sacramento, California.

Michael Massaro's NPI, 1558741447, was assigned on June 4, 2015. Michael Massaro graduated from University of Tennessee Health Science Center College of Medicine - Memphis in 2015. Michael Massaro holds California license A172725.

NPI and contact details
Medicare PAC ID
4385957661
NPI enumeration date
June 4, 2015
NPI status
Active
Accepts Medicare assignment
Yes
Offers telehealth
Yes
Practice phone
(916) 733-6940
Professional email
Get email
Personal email
Get email
Mobile number
Get number
Sex
Male
Estimated age
37
Medical school graduation
2015

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

Michael T. Massaro practices at Sacramento Midtown Endoscopy Center in Sacramento, California

Michael Massaro's primary practice is Sacramento Midtown Endoscopy Center, at 3941 J Street, Suite 460, Sacramento, CA 95819. The practice phone is (916) 733-6940.

  • Sacramento Midtown Endoscopy Center
    3941 J Street, Suite 460, Sacramento, CA 95819Phone(916) 733-6940

Source: Dmand AI Affiliation Data

Michael T. Massaro is affiliated with 4 sites of care and 1 medical group

Michael Massaro's primary practice is Sacramento Midtown Endoscopy Center in Sacramento, California. Michael Massaro is also affiliated with Dignity Health - Mercy General Hospital. The medical group on file is Mercy Medical Group. Dmand AI also links Michael Massaro to 1 more hospital and 1 group practice or clinic, each named with a free account.

See all 5 affiliations for Michael Massaro

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

Dmand AI tracks the EHR system at Michael T. Massaro's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Michael Massaro practices, 4 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
Sacramento Midtown Endoscopy CenterAvailable with a free account
+3 more affiliated sitesAvailable with a free account

Source: Dmand AI Technology Install Data

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Michael T. Massaro is one of 1,977 gastroenterologists in California

Gastroenterology is Michael Massaro's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Michael Massaro is board certified in gastroenterology by the American Board of Internal Medicine. Dmand AI has Michael Massaro's licenses on file in 3 states: California, Alabama and North Carolina.

Specialties and state licenses

  • Gastroenterology, CaliforniaPrimaryLicense A172725 · 2021 to 2027 · taxonomy 207RG0100X
  • Alabama license2018 to 2021
  • North Carolina license2015 to 2018

Clinical focus

Dmand AI lists acid reflux, chronic inflammatory bowel disease (IBD), cirrhosis of the liver, colonoscopy, esophagus, stomach, or upper small intestine surgery, fatty liver, gastroenteritis and gastrointestinal bleeding among the conditions Michael Massaro treats.

Gastroenterologists near Michael Massaro

Counts of gastroenterologists 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

Michael T. Massaro billed Medicare for 722 services in 2024

CMS data shows 722 Medicare services from Michael Massaro across 14 procedure codes in 2024, for 443 Medicare patients. Medicare paid $85,546 for them.

Medicare services, 2024722
Medicare patients443
Paid by Medicare$85,546
Procedure codes14

Michael Massaro's Medicare services by type, 2023 to 2024

  • 2023
  • 2024
Office and hospital visits
2023: 5782024: 44523%
Surgery
2023: 2952024: 26411%
Tests and treatments
2023: 192024: 1332%
Other services
2023: 142024: 0100%

Where Michael Massaro's Medicare services took place, 2024

  • In an office28940%
  • In a facility43360%

Michael Massaro compared with the California median for gastroenterologists, 2024

  • Michael Massaro
  • California median
Medicare services
722vs 58623% above
Medicare patients
443vs 30247% above
Part D claims
830vs 3802.2 times

Medians across 1,875 gastroenterologists in California with Dmand AI profiles that report each measure.

Michael Massaro'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 Michael Massaro

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

Michael T. Massaro treated 443 Medicare patients in 2024, average age 72

CMS counts 443 Medicare patients who saw Michael Massaro in 2024. The largest group is 65 to 74, with 218 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 34% are also on Medicaid. Their average risk score is 1.38, where 1.00 is the Medicare average.

Across all payers, Dmand AI patient panel data puts Michael Massaro's median patient age at 63, with 55% women.

Medicare patients, 2024443
Average age72
Average risk score1.38
Also on Medicaid34%

Michael Massaro's Medicare patients by age, 2024

Michael Massaro's Medicare patients by sex, 2024

  • Women25257%
  • Men19143%

Chronic conditions among Michael Massaro's Medicare patients, 2024

  1. High blood pressure75%
  2. High cholesterol75%
  3. Arthritis49%
  4. Diabetes30%
  5. Mood disorders30%
  6. Anxiety28%
  7. Depression27%
  8. Chronic kidney disease26%

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

Michael Massaro's patients across all payers

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

Patient panel by age, all payers

Median age 63

Patient panel by sex, all payers

  • Women55%
  • Men44%

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

Michael T. Massaro wrote 994 Medicare Part D claims in 2024

In 2024, Michael Massaro wrote 994 Medicare Part D claims for 403 patients. 83% of them were for generic drugs. CMS names the drug for 830 of them, across 13 drugs with 11 or more claims each, at $70,238 in total drug cost. In 2023, CMS named 775 claims across 15 drugs.

Part D claims, 2024994
Drugs named by CMS13
Total drug cost$70,238
Part D patients403

Michael Massaro's Part D claims by kind of drug, 2024

  • Generic825 claims83%
  • Brand-name169 claims17%

Michael Massaro'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 Michael Massaro's Part D claims, 2024

  • Antibiotics2%18 of 994 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: 7752024: 8307%

Drugs named by CMS: 13 in 2024, 15 in 2023.

See all prescribing by Michael Massaro

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

Michael T. Massaro scored 100 out of 100 in Medicare's MIPS program for 2024

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 100 out of 100 for Michael Massaro for performance year 2024, reported through an alternative payment model (APM). Michael Massaro accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Michael Massaro as offering telehealth. CMS counts 166 procedures of upper gastrointestinal (gi) endoscopy for acid reflux by Michael Massaro, more than 87% of the clinicians it reports for that procedure.

Accepts Medicare assignment
Yes
Offers telehealth
Yes

Michael Massaro's MIPS scores, performance year 2024

  • 100of 100Final score
  • 86.3of 100Quality
  • 100of 100Promoting Interoperability
  • 40of 100Improvement Activities

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

Where Michael Massaro ranks in Medicare procedure volume

Upper gastrointestinal (GI) endoscopy for acid reflux
87th percentile166 procedures
Colonoscopy
86th percentile131 procedures

CMS ranks each clinician against every clinician it reports for the same procedure category.

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

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Michael T. Massaro has 3 publications on record

Dmand AI links 3 papers to Michael Massaro in 2020. 2020 was the busiest year, with 2. Michael Massaro's most frequent co-authors are Katherine Rachel Birchard, MD, Evan S. Dellon, MD, MPH and Caleb J. Doyle-Burr.

Papers3

Michael Massaro's most frequent co-authors

Recent publications by Michael Massaro

See all 3 publications and co-authors

See who Michael Massaro researches with

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

How network discovery works

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

Michael T. Massaro received $2,823 in industry payments from 2019 to 2025

CMS Open Payments shows 111 general payments to Michael Massaro from 13 drug and device companies from 2019 to 2025. Food and beverage make up the largest share, 97% of the total. Sanofi and Genzyme US Companies paid the most, $756.

General payments to Michael Massaro by program year, 2019 to 2025

General payments to Michael Massaro by kind, 2019 to 2025

$2.8Kin total
  • Food and beverage$2,73397%
  • Education$903%

Companies that paid Michael Massaro the most, 2019 to 2025

Share is of all general payments to this clinician.

See all payments to Michael Massaro

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

Michael T. Massaro graduated from University of Tennessee Health Science Center College of Medicine - Memphis

Michael Massaro graduated from University of Tennessee Health Science Center College of Medicine - Memphis in 2015.

  1. Medical schoolUniversity of Tennessee Health Science Center College of Medicine - Memphis
  2. Board certified in gastroenterologyAmerican Board of Internal Medicine
  3. Board certified in internal medicineAmerican Board of Internal Medicine

Source: Dmand AI Professional Profile Data

Michael T. Massaro accepts plans from 14 insurance carriers

Michael Massaro is in network with 14 carriers, including Aetna, United Healthcare and Blue Cross Blue Shield of Michigan. PPO plans come from the most carriers, 10. Check the plan with the practice before a visit.

  • Aetna
  • United Healthcare
  • Blue Cross Blue Shield of Michigan
  • Elevance
  • HCSC
  • Blue Cross Blue Shield of Massachusetts
  • Humana
  • Regence Health Plans
  • +6 more carriersWith a free account

Plan types Michael Massaro accepts, by number of carriers

  1. PPO10
  2. Medicare8
  3. HMO6
  4. EPO4
  5. POS2

Source: Dmand AI Insurance Network Data

Sources for Michael T. Massaro'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)Doctors and Clinicians Utilization Data (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 Michael T. Massaro

Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.

What is Michael T. Massaro's NPI number?

Michael T. Massaro's NPI number is 1558741447. It was assigned on June 4, 2015, and it is active in the NPI Registry.

What does Michael T. Massaro specialize in?

Michael T. Massaro is a gastroenterologist in Sacramento, California. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).

Where does Michael T. Massaro practice?

Michael Massaro practices at 3941 J Street, Suite 460, Sacramento, CA 95819. Michael Massaro's primary practice is Sacramento Midtown Endoscopy Center in Sacramento, California. Dmand AI also links Michael Massaro to 1 hospital and 1 group practice or clinic.

What is Michael T. Massaro's office phone number?

The practice phone on file for Michael Massaro is (916) 733-6940.

What is Michael T. Massaro's medical license number?

Michael Massaro holds California license A172725, one of the licenses on file in 3 states.

Which states has Michael T. Massaro been licensed in?

Dmand AI has state licenses on file for Michael Massaro in California (2021 to 2027), Alabama (2018 to 2021) and North Carolina (2015 to 2018).

Which hospitals is Michael T. Massaro affiliated with?

Michael Massaro is affiliated with Dignity Health - Mercy General Hospital. Dmand AI links Michael Massaro to 1 more hospital.

What medical group is Michael T. Massaro part of?

Michael Massaro is linked to Mercy Medical Group.

Does Michael T. Massaro accept Medicare?

Yes. CMS data shows Michael Massaro billed Medicare for 722 services in 2024, and Michael Massaro accepts Medicare assignment.

Does Michael T. Massaro offer telehealth?

Yes. The CMS Doctors and Clinicians file lists Michael Massaro as offering telehealth services.

Show 11 more questionsShow fewer questions

What is Michael T. Massaro's MIPS score?

Michael Massaro's MIPS final score for performance year 2024 is 100 out of 100, reported through an alternative payment model (APM).

How many Medicare patients does Michael T. Massaro see?

CMS counts 443 Medicare patients who saw Michael Massaro in 2024, with an average age of 72.

Is Michael T. Massaro board certified?

Yes. Michael Massaro is board certified in gastroenterology by the American Board of Internal Medicine.

What services does Michael T. Massaro bill to Medicare?

In 2024, Michael Massaro's most billed Medicare services were office visit, established patient (99214), office visit, new patient (99204) and surgery: digestive system (45385).

Where did Michael T. Massaro go to medical school?

Michael Massaro graduated from University of Tennessee Health Science Center College of Medicine - Memphis in 2015.

What drugs does Michael T. Massaro prescribe most?

In 2024 Medicare Part D data, Michael Massaro's most prescribed drugs by claims were Pantoprazole Sodium, Sod Sulf-Potass Sulf-Mag Sulf and Omeprazole.

Has Michael T. Massaro received payments from drug or device companies?

CMS Open Payments shows $2,823 in general payments to Michael Massaro from 13 companies from 2019 to 2025. The largest total came from Sanofi and Genzyme US Companies.

How long has Michael T. Massaro been practicing?

Michael Massaro graduated from medical school in 2015, 11 years ago.

Does Michael T. Massaro do research?

Dmand AI links 3 publications to Michael Massaro.

Who does Michael T. Massaro publish with?

Michael Massaro's most frequent co-authors are Katherine Rachel Birchard, MD (1 shared paper), Evan S. Dellon, MD, MPH (1 shared paper) and Caleb J. Doyle-Burr (1 shared paper).

What insurance does Michael T. Massaro accept?

Michael Massaro is in network with 14 carriers, including Aetna, United Healthcare and Blue Cross Blue Shield of Michigan. PPO plans come from the most carriers, 10. Check the plan with the practice before a visit.

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