Dr. Matthew Asa Mason, MD
- Medicare services, 2024
- 7,270
- Medicare patients, 2024
- 738
- Part D claims, 2024
- 1,208
- Hospital affiliations
- 1
- Industry payments
- $11,949
- Practice address
- 103 Liner Drive, Greenwood, SC 29646
- Practice phone
- Call (864) 227-3838
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Greenwood Endoscopy Center
Surgery Center - Medicare-Certified · Greenwood, South Carolina
Find Dr. Mason'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. Matthew Asa Mason is a gastroenterologist in Greenwood, South Carolina
Dr. Mason practices at Greenwood Endoscopy Center in Greenwood, South Carolina.
Dr. Mason's NPI, 1710272471, was assigned on June 10, 2011. Dr. Mason graduated from University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) in 2011. Dr. Mason holds South Carolina license 33732.
- NPI
- 1710272471NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8224351499
- NPI enumeration date
- June 10, 2011
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (864) 227-3838
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 41
- Medical school graduation
- 2011
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Matthew Asa Mason practices at Greenwood Endoscopy Center in Greenwood, South Carolina
Dr. Mason's primary practice is Greenwood Endoscopy Center, at 103 Liner Drive, Greenwood, SC 29646. The practice phone is (864) 227-3838.
- Greenwood Endoscopy Center103 Liner Drive, Greenwood, SC 29646Phone(864) 227-3838
Source: Dmand AI Affiliation Data
Dr. Matthew Asa Mason is affiliated with 3 sites of care and 4 medical groups
Dr. Mason's primary practice is Greenwood Endoscopy Center in Greenwood, South Carolina. Dr. Mason is also affiliated with Self Regional Healthcare. The medical group on file is Self Medical Group. Dmand AI also links Dr. Mason to 3 more medical groups and 1 group practice or clinic, each named with a free account. Dr. Mason's employer is on file too: a surgery center (asc).
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Matthew Asa Mason's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Mason practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Greenwood Endoscopy Center | Available with a free account |
| +2 more sites and 3 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Matthew Asa Mason is one of 255 gastroenterologists in South Carolina
Gastroenterology is Dr. Mason's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Mason is licensed in South Carolina.
Specialties and state licenses
- Gastroenterology, South CarolinaPrimary
Gastroenterologists near Dr. Mason
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
Dr. Matthew Asa Mason billed Medicare for 7,270 services in 2024
CMS data shows 7,270 Medicare services from Dr. Mason across 17 procedure codes in 2024, for 738 Medicare patients. Medicare paid $395,074 for them.
Dr. Mason's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Lab and pathology
- 2023: 5,3072024: 5,96612%
- Surgery
- 2023: 9982024: 9832%
- Office and hospital visits
- 2023: 4002024: 21347%
- Other services
- 2023: 742024: 723%
- Tests and treatments
- 2023: 242024: 3650%
Where Dr. Mason's Medicare services took place, 2024
- In an office6,24386%
- In a facility1,02714%
Dr. Mason compared with the South Carolina median for gastroenterologists, 2024
- Dr. Mason
- South Carolina median
- Medicare services
- 7,270vs 7459.8 times
- Medicare patients
- 738vs 44566% above
- Part D claims
- 1,063vs 4972.1 times
Medians across 249 gastroenterologists in South Carolina with Dmand AI profiles that report each measure.
Dr. Mason'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.
Need commercial claims for Dr. Mason?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Mason and other gastroenterologists in South Carolina.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Matthew Asa Mason treated 738 Medicare patients in 2024, average age 72
CMS counts 738 Medicare patients who saw Dr. Mason in 2024. The largest group is 65 to 74, with 416 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 3% are also on Medicaid. Their average risk score is 0.89, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Mason's median patient age at 64, with 53% women.
Dr. Mason's Medicare patients by age, 2024
Dr. Mason's Medicare patients by sex, 2024
- Women41656%
- Men32244%
Chronic conditions among Dr. Mason's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis46%
- Diabetes29%
- Anxiety26%
- Ischemic heart disease22%
- Mood disorders21%
- Depression20%
Share of Medicare patients with each condition. A patient can have several.
Dr. Mason's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 64
Patient panel by sex, all payers
- Women53%
- Men47%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Matthew Asa Mason wrote 1,208 Medicare Part D claims in 2024
In 2024, Dr. Mason wrote 1,208 Medicare Part D claims for 616 patients. 82% of them were for generic drugs. CMS names the drug for 1,063 of them, across 17 drugs with 11 or more claims each, at $214,925 in total drug cost. In 2023, CMS named 1,064 claims across 19 drugs.
Dr. Mason's Part D claims by kind of drug, 2024
- Generic985 claims82%
- Brand-name223 claims18%
Dr. Mason'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. Mason's Part D claims, 2024
- Opioids1%12 of 1,208 claims
- Antibiotics2%22 of 1,208 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: 1,0642024: 1,063No change
Drugs named by CMS: 17 in 2024, 19 in 2023.
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. Matthew Asa Mason ranks in the 97th percentile for upper gastrointestinal (gi) endoscopy for acid reflux in Medicare
Dr. Mason accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 367 procedures of upper gastrointestinal (gi) endoscopy for acid reflux by Dr. Mason, more than 97% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Mason ranks in Medicare procedure volume
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 97th percentile367 procedures
- Colonoscopy
- 95th percentile221 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Matthew Asa Mason received $11,949 in industry payments from 2016 to 2025
CMS Open Payments shows 758 general payments to Dr. Mason from 45 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 97% of the total. Abbvie Inc. paid the most, $3,749.
General payments to Dr. Mason by program year, 2016 to 2025
General payments to Dr. Mason by kind, 2016 to 2025
- Food and beverage$11,61597%
- Education$2092%
- Speaker and faculty fees$1251%
Companies that paid Dr. Mason 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. Matthew Asa Mason graduated from University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb)
Dr. Mason graduated from University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) in 2011.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Matthew Asa Mason'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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy 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 | Dmand AI Patient Panel DataMedicare 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)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile 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. Matthew Asa Mason
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. Matthew Asa Mason's NPI number?
Dr. Matthew Asa Mason's NPI number is 1710272471. It was assigned on June 10, 2011, and it is active in the NPI Registry.
What kind of doctor is Dr. Matthew Asa Mason?
Dr. Matthew Asa Mason is a gastroenterologist in Greenwood, South Carolina. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. Matthew Asa Mason practice?
Dr. Mason practices at 103 Liner Drive, Greenwood, SC 29646. Dr. Mason's primary practice is Greenwood Endoscopy Center in Greenwood, South Carolina. Dmand AI also links Dr. Mason to 3 medical groups and 1 group practice or clinic.
What is Dr. Matthew Asa Mason's office phone number?
The practice phone on file for Dr. Mason is (864) 227-3838.
What is Dr. Matthew Asa Mason's medical license number?
Dr. Mason holds South Carolina license 33732.
Which hospitals is Dr. Matthew Asa Mason affiliated with?
Dr. Mason is affiliated with Self Regional Healthcare.
What medical group is Dr. Matthew Asa Mason part of?
Dr. Mason is linked to Self Medical Group. Dmand AI links Dr. Mason to 3 more medical groups.
Does Dr. Matthew Asa Mason accept Medicare?
Yes. CMS data shows Dr. Mason billed Medicare for 7,270 services in 2024, and Dr. Mason accepts Medicare assignment.
How many Medicare patients does Dr. Matthew Asa Mason see?
CMS counts 738 Medicare patients who saw Dr. Mason in 2024, with an average age of 72.
What services does Dr. Matthew Asa Mason bill to Medicare?
In 2024, Dr. Mason's most billed Medicare services were lab and pathology test (88305), lab and pathology test (88313) and lab and pathology test (88312).
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Where did Dr. Matthew Asa Mason go to medical school?
Dr. Mason graduated from University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) in 2011.
What drugs does Dr. Matthew Asa Mason prescribe most?
In 2024 Medicare Part D data, Dr. Mason's most prescribed drugs by claims were Pantoprazole Sodium, Sod Sulf-Potass Sulf-Mag Sulf and Gavilyte-G.
Has Dr. Matthew Asa Mason received payments from drug or device companies?
CMS Open Payments shows $11,949 in general payments to Dr. Mason from 45 companies from 2016 to 2025. The largest total came from Abbvie Inc.
How long has Dr. Matthew Asa Mason been practicing?
Dr. Mason graduated from medical school in 2011, 15 years ago.
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