NPI registry status
Active
2026 NPPES data Family Medicine Physician NPI 1821098633 MD
Verify on CMS → Caryn Wallace, MD
Family Medicine Physician in Sioux Falls, South Dakota. This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers — including 147,640 in Family Medicine Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration — see our methodology.
Federal data — no proprietary rating.
We show these CMS records as-is — no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
4K
Medicare Part D claims · 335 beneficiaries · Family Medicine Physician avg: 3K
Generic prescribing
92%
generic claims · 8% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
76.7/100
▼ 6 pts below national avg 83.1 · Above neutral
Industry payments
$156.07
10 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Caryn Wallace, MD reported a CMS MIPS final score of 76.7/100 — below the 83.1 national average — and filed 4,158 Medicare Part D claims in 2023.
- 76.7/100
- MIPS score · -6 vs avg
- 4K
- Part D claims, 2023
- 92%
- generic prescribing
- Likely
- board-certified (heuristic)
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) — no proprietary rating or editorial opinion is applied.
Caryn Wallace, MD's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023 — the federal quality measure
77 21st percentile higher than 21% of 477,587 scored providers
Each bar is a band; taller bars hold more scored providers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where Caryn Wallace, MD sits
This provider among family medicine physician peers
Across the 22,040 family medicine physician providers who report both Medicare Part D prescribing and a MIPS quality score, Caryn Wallace, MD writes more Part D claims than 61% of them and scores higher on MIPS quality than 22% — placing this provider in the high-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Part D claim volume vs MIPS quality, by specialty percentile
Each dot is one family medicine physician peer from a representative sample of 60; the gold marker is Caryn Wallace, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic — not verified)
Caryn Wallace, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 1 hospital affiliation — signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Caryn Wallace, MD?
Below national averagePrimary specialty
Family Medicine Physician
Medicare Part D claims
4,158 22% vs specialty avg
MIPS final score
76.7/100 6.4 pts vs avg
Specialty distribution in South Dakota
How Family Medicine Physician compares to other specialties among South Dakota providers
Largest specialties in South Dakota (% of in-state providers)
Medicare quality performance — MIPS
Caryn Wallace, MD's 2023 MIPS final score plotted against the Family Medicine Physician national average
- MIPS Final Score
- 76.7/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Family Medicine Physician) — 76.7/100 vs national avg 83.1
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
Caryn Wallace, MD appears in the CMS NPPES registry as a Family Medicine Physician provider holding MD credentials at 6110 S MINNESOTA AVE, Sioux Falls, SD, 57108, with a listed phone of (605) 328-5800. NPI 1821098633 was issued on 07/22/2005. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what Wallace most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.
Medicare Part D records for calendar year 2023 show 4,158 prescription claims written by this provider, covering 335 Medicare beneficiaries and totaling roughly $208K in drug spend, split 8% brand-name and 92% generic by claim count, with an opioid prescribing rate of 3.2%. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 76.7/100 for the 2023 performance year (Quality 78.6, Cost 44.6), compared with the national average of 83.1.
Family Medicine Physician is a high-volume specialty nationwide, with 147,640 enrolled providers across 56 states and an average of 3,418 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline. Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist — always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.
Practice Address
Provider Details
| NPI | 1821098633 |
|---|---|
| Specialty | Family Medicine Physician |
| Credentials | MD |
| Gender | Female |
| NPI Issued | 07/22/2005 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
76.6912
Final Score
Avg: 83.1
78.5693
Quality
44.5681
Cost
99
Promoting Interoperability
Reporting: Group practice
Hospital and facility affiliations
Facilities where Caryn Wallace, MD bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" — a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.
Sanford Medical Center
Sioux Falls, SD
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Industry payments received (2024) — CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Caryn Wallace, MD. Source: openpaymentsdata.cms.gov.
Total received
$156
Largest payer
ABBVIE INC.
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias — they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
Brand vs generic prescribing mix · Generic-heavy
Caryn Wallace, MD — brand share 8.0%
Family Medicine Physician average
8% brand-name claims vs 92% generic, on 4,158 2023 Medicare Part D claims.
The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
4,158
Total Claims
$208K
Total Drug Cost
335
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 9,066
- Total Day Supply
- 262,294
- Brand vs Generic
- 8% brand / 92% generic
- Brand Drug Cost
- $134K
- Generic Drug Cost
- $73K
- Opioid Claims
- 132 (3.2% rate)
- Antibiotic Claims
- 70
Patient Demographics
- Average Patient Age
- 72.3 years
- Avg HCC Risk Score
- 0.88
- Gender Split
- 83% female / 17% male
- Age Distribution
- <65: 29, 65-74: 179, 75-84: 95, 85+: 32
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Caryn Wallace, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Omeprazole
Omeprazole
276 claims
- Rosuvastatin Calcium
Rosuvastatin Calcium
224 claims
- Atorvastatin Calcium
Atorvastatin Calcium
196 claims
- Simvastatin
Simvastatin
188 claims
- Levothyroxine Sodium
Levothyroxine Sodium
187 claims
- Lisinopril
Lisinopril
172 claims
- Amlodipine Besylate
Amlodipine Besylate
117 claims
- Hydrochlorothiazide 105
Hydrochlorothiazide
105 claims
| Drug | Claims |
|---|---|
| Omeprazole | 276 |
| Rosuvastatin Calcium | 224 |
| Atorvastatin Calcium | 196 |
| Simvastatin | 188 |
| Levothyroxine Sodium | 187 |
| Lisinopril | 172 |
| Amlodipine Besylate | 117 |
| Hydrochlorothiazide | 105 |
| Sertraline Hcl | 96 |
| Losartan Potassium | 94 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Family Medicine Physician Overview
How Caryn Wallace, MD fits within the Family Medicine Physician landscape nationally.
147,640
Family Medicine Physician Providers in US
56
States with Family Medicine Physician
3,418
Avg Claims per Provider
Caryn Wallace, MD's 4,158 claims are above the specialty average of 3,418.
Nearby Family Medicine Physician Providers in South Dakota
Other clinicians with the same primary specialty enrolled in South Dakota, drawn from the same CMS NPPES roster as Wallace.
Dr. Gordon Abernathie
D.O.
Rapid City, SD
Dr. Kyle Adams
D.O.
Rapid City, SD
Dr. Mary Ahlers
DO
Brookings, SD
Dr. Alese Allerdings
M.D.
De Smet, SD
Dr. Jay Allison
MD
Sioux Falls, SD
Compare Family Medicine Physician nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry — providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the South Dakota medical board — federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Family Medicine Physician peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only — they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
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Frequently Asked Questions
What is Caryn Wallace, MD's specialty? ▼
Caryn Wallace, MD specializes in Family Medicine Physician and practices in Sioux Falls, South Dakota. Credentials: MD.
How much does Caryn Wallace, MD prescribe under Medicare Part D? ▼
In 2023, Caryn Wallace, MD wrote 4,158 Medicare Part D claims totaling $208K in drug costs for 335 beneficiaries.
What is Caryn Wallace, MD's Medicare quality score? ▼
Caryn Wallace, MD has a CMS MIPS Final Score of 76.7/100 (Quality: 78.6, Cost: 44.6). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Caryn Wallace, MD located? ▼
Caryn Wallace, MD is located at 6110 S MINNESOTA AVE, Sioux Falls, SD, 57108. Phone: (605) 328-5800.
What is Caryn Wallace, MD's NPI number? ▼
Caryn Wallace, MD's National Provider Identifier (NPI) is 1821098633, issued on 07/22/2005.
Does Caryn Wallace, MD prescribe more brand-name or generic drugs? ▼
Caryn Wallace, MD's prescribing is 8% brand-name and 92% generic drugs by claim count, with $134K in brand drug costs.
Does Caryn Wallace, MD prescribe opioids? ▼
Yes, Caryn Wallace, MD had 132 opioid claims in 2023 with an opioid prescribing rate of 3.2%.
How many Family Medicine Physician providers are there in the US? ▼
There are 147,640 Family Medicine Physician providers across 56 states in the US. The average Family Medicine Physician provider writes 3,418 Medicare Part D claims per year.
What drugs does Caryn Wallace, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Caryn Wallace, MD's most frequently prescribed drugs include Omeprazole, Rosuvastatin Calcium, Atorvastatin Calcium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Caryn Wallace, MD accept Medicare? ▼
Caryn Wallace, MD appears in CMS Medicare data with 4,158 Part D claims and 335 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Caryn Wallace, MD's credentials? ▼
Caryn Wallace, MD's NPI is 1821098633 with credentials MD. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Prescribing Data
- CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Quality Performance
- CMS Merit-based Incentive Payment System (MIPS) — 2023 performance year.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Compiled from official public sources by the PlainDoctor editorial team.