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Dr. Gregory J. Macchio, MD
NPI1386621100
- Medicare services, 2024
- 130
- Medicare patients, 2024
- 162
- Part D claims, 2017
- 12
- Publications
- 1
- Industry payments
- $2,877
- Practice address
- 27700 Medical Center Rd, Mission Viejo, CA 92691
- Practice phone
- Call (949) 364-1400
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Mission Hospital Mission Viejo
Mission Viejo, California
Find Dr. Macchio's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Gregory J. Macchio is an anesthesiologist in Mission Viejo, California
Dr. Macchio practices at Mission Hospital Mission Viejo in Mission Viejo, California.
Dr. Macchio's NPI, 1386621100, was assigned on December 22, 2005. Dr. Macchio graduated from Feinberg School of Medicine in 1993. Dr. Macchio's Indiana license number on file is 01044919A.
NPI and contact details
- NPI
- 1386621100NPI Registry (opens in a new tab)
- NPI enumeration date
- December 22, 2005
- NPI status
- Active
- Practice phone
- (949) 364-1400
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Medical school graduation
- 1993
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Gregory J. Macchio practices at Mission Hospital Mission Viejo in Mission Viejo, California
Dr. Macchio's primary practice is Mission Hospital Mission Viejo, at 27700 Medical Center Rd, Mission Viejo, CA 92691 in Orange County. The practice phone is (949) 364-1400.
- Mission Hospital Mission Viejo27700 Medical Center Rd, Mission Viejo, CA 92691 · Orange CountyPhone(949) 364-1400
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Gregory J. Macchio is affiliated with 1 site of care
Dr. Macchio's primary practice is Mission Hospital Mission Viejo in Mission Viejo, California.
Mission Hospital Mission ViejoPrimary
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dmand AI tracks the EHR system at Dr. Gregory J. Macchio's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Macchio practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Mission Hospital Mission Viejo | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gregory J. Macchio is one of 6,593 anesthesiologists in California
Anesthesiology is Dr. Macchio's primary specialty in the NPI Registry, under taxonomy code 207L00000X. Dr. Macchio is board certified in anesthesiology by the American Board of Anesthesiology. Dmand AI has Dr. Macchio's licenses on file in 7 states: Indiana, California, Virginia, District of Columbia, Maryland, Illinois and Michigan.
Specialties and state licenses
- Anesthesiology, IndianaPrimary
- California license
- Virginia license
- District of Columbia license
- Maryland license
- Illinois license
- Michigan license
Anesthesiologists near Dr. Macchio
Counts of anesthesiologists 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. Gregory J. Macchio billed Medicare for 130 services in 2024
CMS data shows 130 Medicare services from Dr. Macchio across 4 procedure codes in 2024, for 162 Medicare patients. Medicare paid $14,026 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 2024130
Medicare patients162
Paid by Medicare$14,026
Procedure codes4
Dr. Macchio's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Anesthesia
- 2023: 1882024: 13031%
Dr. Macchio compared with the California median for anesthesiologists, 2024
- Dr. Macchio
- California median
- Medicare services
- 130vs 7281% above
- Medicare patients
- 162vs 14313% above
- Part D claims
- 12vs 2348% below
Medians across 5,562 anesthesiologists in California with Dmand AI profiles that report each measure.
Dr. Macchio'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.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Macchio and other anesthesiologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gregory J. Macchio treated 162 Medicare patients in 2024, average age 73
CMS counts 162 Medicare patients who saw Dr. Macchio in 2024. The largest group is 65 to 74, with 94 patients. 75% of them have high cholesterol, and 66% have high blood pressure. Their average risk score is 0.97, where 1.00 is the Medicare average.
Medicare patients, 2024162
Average age73
Average risk score0.97
Dr. Macchio's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Macchio's Medicare patients by sex, 2024
- Women9156%
- Men7144%
Chronic conditions among Dr. Macchio's Medicare patients, 2024
- High cholesterol75%
- High blood pressure66%
- Arthritis40%
- Anxiety25%
- Ischemic heart disease23%
- Diabetes22%
- Osteoporosis21%
- Cancer17%
Share of Medicare patients with each condition. A patient can have several.
Source: Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Gregory J. Macchio wrote 12 Medicare Part D claims in 2017
In 2017, Dr. Macchio wrote 12 Medicare Part D claims. Every claim was for a generic drug. They cover 1 drug, with $217 in total drug cost.
Part D claims, 201712
Drugs named by CMS1
Total drug cost$217
Dr. Macchio's most prescribed drugs by claims, 2017
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. Gregory J. Macchio has 1 publication on record
Dmand AI links 1 paper to Dr. Macchio.
Papers1
Recent publications by Dr. Macchio
See who Dr. Macchio researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Macchio works with, so you can find a warm path to the right anesthesiologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Gregory J. Macchio received $2,877 in industry payments from 2016 to 2025
CMS Open Payments shows 39 general payments to Dr. Macchio from 7 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 80% of the total. Medtronic USA, Inc. paid the most, $2,032.
General payments to Dr. Macchio by program year, 2016 to 2025
General payments to Dr. Macchio by kind, 2016 to 2025
$2.9Kin total
- Food and beverage$2,31080%
- Travel and lodging$56220%
- Education$40%
Companies that paid Dr. Macchio the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Gregory J. Macchio graduated from Feinberg School of Medicine
Dr. Macchio graduated from Feinberg School of Medicine in 1993.
- Medical school
- Board certified in anesthesiology
Source: Dmand AI Professional Profile Data
Dr. Gregory J. Macchio accepts plans from 1 insurance carrier
Dr. Macchio is in network with 1 carrier, including Molina. HMO plans come from the most carriers, 1. Check the plan with the practice before a visit.
- Molina
Plan types Dr. Macchio accepts, by number of carriers
- HMO1
- Medicare1
Source: Dmand AI Insurance Network Data
Sources for Dr. Gregory J. Macchio's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Medicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Gregory J. Macchio
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. Gregory J. Macchio's NPI number?
Dr. Gregory J. Macchio's NPI number is 1386621100. It was assigned on December 22, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Gregory J. Macchio?
Dr. Gregory J. Macchio is an anesthesiologist in Mission Viejo, California. The primary specialty in the NPI Registry is Anesthesiology Physician (taxonomy code 207L00000X).
Where does Dr. Gregory J. Macchio practice?
Dr. Macchio practices at 27700 Medical Center Rd, Mission Viejo, CA 92691. Dr. Macchio's primary practice is Mission Hospital Mission Viejo in Mission Viejo, California.
What is Dr. Gregory J. Macchio's office phone number?
The practice phone on file for Dr. Macchio is (949) 364-1400.
What is Dr. Gregory J. Macchio's medical license number?
Dr. Macchio's Indiana license number on file is 01044919A, one of the licenses on file in 7 states.
Which states has Dr. Gregory J. Macchio been licensed in?
Dmand AI has state licenses on file for Dr. Macchio in Indiana (1996 to 2021), California (2009 to 2027), Virginia (1997 to 2022), District of Columbia (1999 to 2013), Maryland (1997 to 2011), Illinois (1993 to 1999) and Michigan (1995 to 1996).
Does Dr. Gregory J. Macchio accept Medicare?
Yes. CMS data shows Dr. Macchio billed Medicare for 130 services in 2024.
How many Medicare patients does Dr. Gregory J. Macchio see?
CMS counts 162 Medicare patients who saw Dr. Macchio in 2024, with an average age of 73.
Is Dr. Gregory J. Macchio board certified?
Yes. Dr. Macchio is board certified in anesthesiology by the American Board of Anesthesiology.
What services does Dr. Gregory J. Macchio bill to Medicare?
In 2024, Dr. Macchio's most billed Medicare services were anesthesia (00813), anesthesia (00811) and anesthesia (00731).
Show 6 more questionsShow fewer questions
Where did Dr. Gregory J. Macchio go to medical school?
Dr. Macchio graduated from Feinberg School of Medicine in 1993.
What drugs does Dr. Gregory J. Macchio prescribe most?
In 2017 Medicare Part D data, Dr. Macchio's most prescribed drugs by claims were Gabapentin.
Has Dr. Gregory J. Macchio received payments from drug or device companies?
CMS Open Payments shows $2,877 in general payments to Dr. Macchio from 7 companies from 2016 to 2025. The largest total came from Medtronic USA, Inc.
How long has Dr. Gregory J. Macchio been practicing?
Dr. Macchio graduated from medical school in 1993, 33 years ago.
Does Dr. Gregory J. Macchio do research?
Dmand AI links 1 publication to Dr. Macchio.
What insurance does Dr. Gregory J. Macchio accept?
Dr. Macchio is in network with 1 carrier, including Molina. HMO plans come from the most carriers, 1. Check the plan with the practice before a visit.
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