Dr. Clarissa Grace Barnes, MD
- Medicare services, 2024
- 380
- Medicare patients, 2024
- 188
- Part D claims, 2024
- 101
- Hospital affiliations
- 3
- Industry payments
- $932
- Practice address
- 1325 S Cliff Ave Post Office Box 5045, Sioux Falls, SD 57117
- Practice phone
- Call (605) 322-8000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Barnes' professional email, personal email and mobile number
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Dr. Clarissa Grace Barnes is an internist in Sioux Falls, South Dakota
Dr. Barnes practices at Avera McKennan Hospital & University Health Center in Sioux Falls, South Dakota, part of Avera Health.
Dr. Barnes' NPI, 1770758757, was assigned on April 29, 2008. Dr. Barnes graduated from Johns Hopkins University School of Medicine in 2008. Dr. Barnes holds South Dakota license 8146.
- NPI
- 1770758757NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9739350968
- NPI enumeration date
- April 29, 2008
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (605) 322-8000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 44
- Medical school graduation
- 2008
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Clarissa Grace Barnes practices at Avera McKennan Hospital & University Health Center in Sioux Falls, South Dakota
Dr. Barnes' primary practice is Avera McKennan Hospital & University Health Center, at 1325 S Cliff Ave Post Office Box 5045, Sioux Falls, SD 57117 in Minnehaha County. The practice phone is (605) 322-8000.
- Avera McKennan Hospital & University Health Center1325 S Cliff Ave Post Office Box 5045, Sioux Falls, SD 57117 · Minnehaha CountyPhone(605) 322-8000
Source: Dmand AI Affiliation Data
Dr. Clarissa Grace Barnes is affiliated with 4 sites of care and 1 medical group
Dr. Barnes' primary practice is Avera McKennan Hospital & University Health Center in Sioux Falls, South Dakota, part of Avera Health. Dr. Barnes is also affiliated with North Memorial Health - Robbinsdale Hospital. The medical group on file is Avera McKennan Hospital & University Health Center. Dmand AI also links Dr. Barnes 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. Clarissa Grace Barnes' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Barnes practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Avera McKennan Hospital & University Health Center | Available with a free account |
| +3 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Clarissa Grace Barnes is one of 267 internists in South Dakota
Internal medicine is Dr. Barnes' primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Barnes is licensed in South Dakota.
Specialties and state licenses
- Internal medicine, South DakotaPrimary
Internists near Dr. Barnes
Counts of internists 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. Clarissa Grace Barnes billed Medicare for 380 services in 2024
CMS data shows 380 Medicare services from Dr. Barnes across 4 procedure codes in 2024, for 188 Medicare patients. Medicare paid $27,134 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Barnes' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 3992024: 35312%
- Tests and treatments
- 2023: 02024: 27
Dr. Barnes compared with the South Dakota median for internists, 2024
- Dr. Barnes
- South Dakota median
- Medicare services
- 380vs 54230% below
- Medicare patients
- 188vs 23620% below
- Part D claims
- 54vs 12456% below
Medians across 262 internists in South Dakota with Dmand AI profiles that report each measure.
Dr. Barnes' 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. Barnes and other internists in South Dakota.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Clarissa Grace Barnes treated 188 Medicare patients in 2024, average age 75
CMS counts 188 Medicare patients who saw Dr. Barnes in 2024. The largest group is 65 to 74, with 74 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 14% are also on Medicaid. Their average risk score is 2.31, 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. Barnes' median patient age at 62, with 55% women.
Dr. Barnes' Medicare patients by age, 2024
Dr. Barnes' Medicare patients by sex, 2024
- Women10254%
- Men8646%
Chronic conditions among Dr. Barnes' Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis57%
- Chronic kidney disease51%
- Heart failure47%
- Ischemic heart disease44%
- Diabetes40%
- Mood disorders40%
Share of Medicare patients with each condition. A patient can have several.
Dr. Barnes' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 62
Patient panel by sex, all payers
- Women55%
- Men44%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Clarissa Grace Barnes wrote 101 Medicare Part D claims in 2024
In 2024, Dr. Barnes wrote 101 Medicare Part D claims for 73 patients. 96% of them were for generic drugs. CMS names the drug for 54 of them, across 1 drug with 11 or more claims each, at $3,540 in total drug cost. In 2023, CMS named 11 claims across 1 drug.
Dr. Barnes' Part D claims by kind of drug, 2024
- Generic97 claims96%
- Brand-name and other4 claims4%
Dr. Barnes' 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: 112024: 54391%
Drugs named by CMS: 1 in 2024, 1 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
How Dr. Clarissa Grace Barnes takes part in Medicare
Dr. Barnes accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Clarissa Grace Barnes received $932 in industry payments from 2016 to 2023
CMS Open Payments shows 83 general payments to Dr. Barnes from 14 drug and device companies from 2016 to 2023. Food and beverage make up the largest share, 99% of the total. Janssen Pharmaceuticals, Inc paid the most, $219.
General payments to Dr. Barnes by program year, 2016 to 2023
General payments to Dr. Barnes by kind, 2016 to 2023
- Food and beverage$92499%
- Education$81%
Companies that paid Dr. Barnes the most, 2016 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Clarissa Grace Barnes graduated from Johns Hopkins University School of Medicine
Dr. Barnes graduated from Johns Hopkins University School of Medicine in 2008.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Clarissa Grace Barnes'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) |
| 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. Clarissa Grace Barnes
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. Clarissa Grace Barnes' NPI number?
Dr. Clarissa Grace Barnes' NPI number is 1770758757. It was assigned on April 29, 2008, and it is active in the NPI Registry.
What kind of doctor is Dr. Clarissa Grace Barnes?
Dr. Clarissa Grace Barnes is an internist in Sioux Falls, South Dakota. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Clarissa Grace Barnes practice?
Dr. Barnes practices at 1325 S Cliff Ave Post Office Box 5045, Sioux Falls, SD 57117. Dr. Barnes' primary practice is Avera McKennan Hospital & University Health Center in Sioux Falls, South Dakota, part of Avera Health. Dmand AI also links Dr. Barnes to 1 hospital and 1 group practice or clinic.
What is Dr. Clarissa Grace Barnes' office phone number?
The practice phone on file for Dr. Barnes is (605) 322-8000.
What is Dr. Clarissa Grace Barnes' medical license number?
Dr. Barnes holds South Dakota license 8146.
Which hospitals is Dr. Clarissa Grace Barnes affiliated with?
Dr. Barnes practices at Avera McKennan Hospital & University Health Center in Sioux Falls, South Dakota. Dr. Barnes is also affiliated with North Memorial Health - Robbinsdale Hospital. Dmand AI links Dr. Barnes to 1 more hospital.
What medical group is Dr. Clarissa Grace Barnes part of?
Dr. Barnes is linked to Avera McKennan Hospital & University Health Center.
Does Dr. Clarissa Grace Barnes accept Medicare?
Yes. CMS data shows Dr. Barnes billed Medicare for 380 services in 2024, and Dr. Barnes accepts Medicare assignment.
How many Medicare patients does Dr. Clarissa Grace Barnes see?
CMS counts 188 Medicare patients who saw Dr. Barnes in 2024, with an average age of 75.
What services does Dr. Clarissa Grace Barnes bill to Medicare?
In 2024, Dr. Barnes' most billed Medicare services were hospital inpatient care (99233), hospital inpatient care (99232) and hospital inpatient care (99238).
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Where did Dr. Clarissa Grace Barnes go to medical school?
Dr. Barnes graduated from Johns Hopkins University School of Medicine in 2008.
What drugs does Dr. Clarissa Grace Barnes prescribe most?
In 2024 Medicare Part D data, Dr. Barnes' most prescribed drugs by claims were Naloxone HCl.
Has Dr. Clarissa Grace Barnes received payments from drug or device companies?
CMS Open Payments shows $932 in general payments to Dr. Barnes from 14 companies from 2016 to 2023. The largest total came from Janssen Pharmaceuticals, Inc.
How long has Dr. Clarissa Grace Barnes been practicing?
Dr. Barnes graduated from medical school in 2008, 18 years ago.
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