Dr. Mark C. Gunby, DO
- Medicare services, 2024
- 626
- Medicare patients, 2024
- 315
- Part D claims, 2024
- 14,202
- Hospital affiliations
- 2
- Industry payments
- $5,109
- Practice address
- 3015 N Ballas Rd, Saint Louis, MO 63131
- Practice phone
- Call (314) 996-5000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Gunby's professional email, personal email and mobile number
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Dr. Mark C. Gunby is a geriatric medicine (internal medicine) physician in Saint Louis, Missouri
Dr. Gunby practices at Missouri Baptist Medical Center in Saint Louis, Missouri, part of BJC Health.
Dr. Gunby's NPI, 1699886309, was assigned on August 31, 2006. Dr. Gunby graduated from Oklahoma State University College of Osteopathic Medicine in 1988. Dr. Gunby holds Missouri license 100326.
- NPI
- 1699886309NPI Registry (opens in a new tab)
- NPI enumeration date
- August 31, 2006
- NPI status
- Active
- Practice phone
- (314) 996-5000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 64
- Medical school graduation
- 1988
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Mark C. Gunby practices at Missouri Baptist Medical Center in Saint Louis, Missouri
Dr. Gunby's primary practice is Missouri Baptist Medical Center, at 3015 N Ballas Rd, Saint Louis, MO 63131 in St. Louis County. The practice phone is (314) 996-5000.
- Missouri Baptist Medical Center3015 N Ballas Rd, Saint Louis, MO 63131 · St. Louis CountyPhone(314) 996-5000
Source: Dmand AI Affiliation Data
Dr. Mark C. Gunby is affiliated with 3 sites of care and 1 medical group
Dr. Gunby's primary practice is Missouri Baptist Medical Center in Saint Louis, Missouri, part of BJC Health. The medical group on file is BJC Medical Group. Dmand AI also links Dr. Gunby to 1 more hospital and 1 group practice or clinic, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Mark C. Gunby's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Gunby practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Missouri Baptist Medical Center | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Mark C. Gunby is one of 57 geriatric medicine (internal medicine) physicians in Missouri
Geriatric medicine is Dr. Gunby's primary specialty in the NPI Registry, under taxonomy code 207RG0300X. Dr. Gunby is licensed in Missouri.
Specialties and state licenses
- Geriatric medicine (internal medicine), MissouriPrimary
Geriatric medicine (internal medicine) physicians near Dr. Gunby
Counts of geriatric medicine (internal medicine) physicians 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 C. Gunby billed Medicare for 626 services in 2024
CMS data shows 626 Medicare services from Dr. Gunby across 7 procedure codes in 2024, for 315 Medicare patients. Medicare paid $48,677 for them. Every service was in an office.
Dr. Gunby's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 5242024: 36131%
- Other services
- 2023: 4822024: 22354%
- Lab and pathology
- 2023: 732024: 2862%
- Tests and treatments
- 2023: 1322024: 1489%
Dr. Gunby compared with the Missouri median for geriatric medicine (internal medicine) physicians, 2024
- Dr. Gunby
- Missouri median
- Medicare services
- 626vs 48928% above
- Medicare patients
- 315vs 20653% above
- Part D claims
- 13,271vs 41232.2 times
Medians across 61 geriatric medicine (internal medicine) physicians in Missouri with Dmand AI profiles that report each measure.
Dr. Gunby'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. Gunby?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Gunby and other geriatric medicine (internal medicine) physicians in Missouri.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Mark C. Gunby treated 315 Medicare patients in 2024, average age 78
CMS counts 315 Medicare patients who saw Dr. Gunby in 2024. The largest group is 75 to 84, with 127 patients. 75% of them have arthritis, and 75% have high blood pressure. Their average risk score is 1.16, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Gunby's median patient age at 73, with 53% women.
Dr. Gunby's Medicare patients by age, 2024
Dr. Gunby's Medicare patients by sex, 2024
- Women17154%
- Men14446%
Chronic conditions among Dr. Gunby's Medicare patients, 2024
- Arthritis75%
- High blood pressure75%
- High cholesterol75%
- Ischemic heart disease32%
- Chronic kidney disease29%
- Anxiety26%
- Osteoporosis25%
- Mood disorders24%
Share of Medicare patients with each condition. A patient can have several.
Dr. Gunby'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
- Women53%
- Men46%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Mark C. Gunby wrote 14,202 Medicare Part D claims in 2024
In 2024, Dr. Gunby wrote 14,202 Medicare Part D claims for 1,031 patients. 88% of them were for generic drugs. CMS names the drug for 13,271 of them, across 170 drugs with 11 or more claims each, at $959,298 in total drug cost. In 2023, CMS named 17,753 claims across 199 drugs.
Dr. Gunby's Part D claims by kind of drug, 2024
- Generic12,452 claims88%
- Brand-name1,689 claims12%
- Other61 claims0%
Dr. Gunby'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. Gunby's Part D claims, 2024
- Opioids3%458 of 14,202 claims
- Antibiotics1%203 of 14,202 claims
- Antipsychotics, patients 65 and over0%29 of 14,202 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: 17,7532024: 13,27125%
Drugs named by CMS: 170 in 2024, 199 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
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Dr. Mark C. Gunby received $5,109 in industry payments from 2016 to 2024
CMS Open Payments shows 365 general payments to Dr. Gunby from 33 drug and device companies from 2016 to 2024. Food and beverage make up the largest share, 100% of the total. Pfizer Inc. paid the most, $950.
General payments to Dr. Gunby by program year, 2016 to 2024
General payments to Dr. Gunby by kind, 2016 to 2024
- Food and beverage$5,108100%
- Education$10%
Companies that paid Dr. Gunby the most, 2016 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Mark C. Gunby graduated from Oklahoma State University College of Osteopathic Medicine
Dr. Gunby graduated from Oklahoma State University College of Osteopathic Medicine in 1988.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Mark C. Gunby'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) |
| 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. Mark C. Gunby
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 C. Gunby's NPI number?
Dr. Mark C. Gunby's NPI number is 1699886309. It was assigned on August 31, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Mark C. Gunby?
Dr. Mark C. Gunby is a geriatric medicine (internal medicine) physician in Saint Louis, Missouri. The primary specialty in the NPI Registry is Geriatric Medicine (Internal Medicine) Physician (taxonomy code 207RG0300X).
Where does Dr. Mark C. Gunby practice?
Dr. Gunby practices at 3015 N Ballas Rd, Saint Louis, MO 63131. Dr. Gunby's primary practice is Missouri Baptist Medical Center in Saint Louis, Missouri, part of BJC Health. Dmand AI also links Dr. Gunby to 1 hospital and 1 group practice or clinic.
What is Dr. Mark C. Gunby's office phone number?
The practice phone on file for Dr. Gunby is (314) 996-5000.
What is Dr. Mark C. Gunby's medical license number?
Dr. Gunby holds Missouri license 100326.
Which hospitals is Dr. Mark C. Gunby affiliated with?
Dr. Gunby practices at Missouri Baptist Medical Center in Saint Louis, Missouri. Dmand AI links Dr. Gunby to 1 more hospital.
What medical group is Dr. Mark C. Gunby part of?
Dr. Gunby is linked to BJC Medical Group.
Does Dr. Mark C. Gunby accept Medicare?
Yes. CMS data shows Dr. Gunby billed Medicare for 626 services in 2024.
How many Medicare patients does Dr. Mark C. Gunby see?
CMS counts 315 Medicare patients who saw Dr. Gunby in 2024, with an average age of 78.
What services does Dr. Mark C. Gunby bill to Medicare?
In 2024, Dr. Gunby's most billed Medicare services were office visit, established patient (99214), medicare service (G0439) and office visit, established patient (99213).
Show 4 more questionsShow fewer questions
Where did Dr. Mark C. Gunby go to medical school?
Dr. Gunby graduated from Oklahoma State University College of Osteopathic Medicine in 1988.
What drugs does Dr. Mark C. Gunby prescribe most?
In 2024 Medicare Part D data, Dr. Gunby's most prescribed drugs by claims were Atorvastatin Calcium, Lisinopril and Amlodipine Besylate.
Has Dr. Mark C. Gunby received payments from drug or device companies?
CMS Open Payments shows $5,109 in general payments to Dr. Gunby from 33 companies from 2016 to 2024. The largest total came from Pfizer Inc.
How long has Dr. Mark C. Gunby been practicing?
Dr. Gunby graduated from medical school in 1988, 38 years ago.
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