NPI registry status
Active
2026 NPPES data Family Medicine Physician NPI 1326007469 MD, PHD
Verify on CMS → Mark Huntington, MD, PHD
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 147,760 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
921
Medicare Part D claims · 53 beneficiaries · Family Medicine Physician avg: 3K
Generic prescribing
85%
generic claims · 12% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$19.8
1 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Mark Huntington, MD, PHD filed 921 Medicare Part D claims in 2023 as a Family Medicine Physician in Sioux Falls, South Dakota, prescribing 85% generic.
- 921
- Part D claims, 2023
- 85%
- 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.
Mark Huntington, MD, PHD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
921 Top 25% higher than 75% of 1,370,886 prescribers
Each bar is a band; taller bars hold more prescribers. 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 Medicare Part D Prescriber Public Use File · 2023
✓
Board certification likely (heuristic, not verified)
Mark Huntington, MD, PHD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 2 hospital affiliations - 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 Mark Huntington, MD, PHD?
Quality data not reportedPrimary specialty
Family Medicine Physician
Medicare Part D claims
921 73% vs specialty avg
Specialty distribution in South Dakota
How Family Medicine Physician compares to other specialties among South Dakota providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Family Medicine Physician. Verify directly:
How MIPS and board certification work
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).
Mark Huntington, MD, PHD appears in the CMS NPPES registry as a Family Medicine Physician provider holding MD, PHD credentials at 1115 E 20TH ST, Sioux Falls, SD, 57105, with a listed phone of (605) 339-1783. NPI 1326007469 was issued on 03/18/2006.
Medicare Part D records for calendar year 2023 show 921 prescription claims written by this provider, covering 53 Medicare beneficiaries and totaling roughly $77K in drug spend, split 12% brand-name and 85% generic by claim count, with an opioid prescribing rate of 4.0%.
Family Medicine Physician is a high-volume specialty nationwide, with 147,760 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 | 1326007469 |
|---|---|
| Specialty | Family Medicine Physician |
| Credentials | MD, PHD |
| Gender | Male |
| NPI Issued | 03/18/2006 |
Hospital and facility affiliations
Facilities where Mark Huntington, MD, PHD 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.
Center For Family Medicine
Sioux Falls, SD
City OF Sioux Falls
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 Mark Huntington, MD, PHD. Source: openpaymentsdata.cms.gov.
Total received
$20
Largest payer
Daiichi Sankyo 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 · Typical
Mark Huntington, MD, PHD - brand share 12.0%
Family Medicine Physician average
12% brand-name claims vs 85% generic, on 921 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.
921
Total Claims
$77K
Total Drug Cost
53
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,340
- Total Day Supply
- 37,114
- Brand vs Generic
- 12% brand / 85% generic
- Brand Drug Cost
- $60K
- Generic Drug Cost
- $14K
- Opioid Claims
- 37 (4.0% rate)
Patient Demographics
- Average Patient Age
- 68.4 years
- Avg HCC Risk Score
- 1.54
- Gender Split
- 70% female / 30% male
- Age Distribution
- <65: 15, 65-74: 20, 75-84: N/A, 85+: N/A
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Mark Huntington, MD, PHD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Gabapentin
Gabapentin
53 claims
- Levothyroxine Sodium
Levothyroxine Sodium
47 claims
- Furosemide
Furosemide
43 claims
- Omeprazole
Omeprazole
34 claims
- Diclofenac Sodium
Diclofenac Sodium
33 claims
- Lisinopril
Lisinopril
30 claims
- Metformin Hcl
Metformin Hcl
28 claims
- Simvastatin
Simvastatin
22 claims
| Drug | Claims |
|---|---|
| Gabapentin | 53 |
| Levothyroxine Sodium | 47 |
| Furosemide | 43 |
| Omeprazole | 34 |
| Diclofenac Sodium | 33 |
| Lisinopril | 30 |
| Metformin Hcl | 28 |
| Simvastatin | 22 |
| Spironolactone | 22 |
| Xarelto Rivaroxaban | 22 |
* 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 Mark Huntington, MD, PHD fits within the Family Medicine Physician landscape nationally.
147,760
Family Medicine Physician Providers in US
56
States with Family Medicine Physician
3,418
Avg Claims per Provider
Mark Huntington, MD, PHD's 921 claims are below 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 Huntington.
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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Medical Specialties Explained
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Understanding Medicare Claims Data
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How insurance networks affect your costs
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Explore South Dakota
Frequently Asked Questions
What is Mark Huntington, MD, PHD's specialty? ▼
Mark Huntington, MD, PHD specializes in Family Medicine Physician and practices in Sioux Falls, South Dakota. Credentials: MD, PHD.
How much does Mark Huntington, MD, PHD prescribe under Medicare Part D? ▼
In 2023, Mark Huntington, MD, PHD wrote 921 Medicare Part D claims totaling $77K in drug costs for 53 beneficiaries.
Where is Mark Huntington, MD, PHD located? ▼
Mark Huntington, MD, PHD is located at 1115 E 20TH ST, Sioux Falls, SD, 57105. Phone: (605) 339-1783.
What is Mark Huntington, MD, PHD's NPI number? ▼
Mark Huntington, MD, PHD's National Provider Identifier (NPI) is 1326007469, issued on 03/18/2006.
Does Mark Huntington, MD, PHD prescribe more brand-name or generic drugs? ▼
Mark Huntington, MD, PHD's prescribing is 12% brand-name and 85% generic drugs by claim count, with $60K in brand drug costs.
Does Mark Huntington, MD, PHD prescribe opioids? ▼
Yes, Mark Huntington, MD, PHD had 37 opioid claims in 2023 with an opioid prescribing rate of 4.0%.
How many Family Medicine Physician providers are there in the US? ▼
There are 147,760 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 Mark Huntington, MD, PHD prescribe most often? ▼
Based on 2023 Medicare Part D data, Mark Huntington, MD, PHD's most frequently prescribed drugs include Gabapentin, Levothyroxine Sodium, Furosemide. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Mark Huntington, MD, PHD accept Medicare? ▼
Mark Huntington, MD, PHD appears in CMS Medicare data with 921 Part D claims and 53 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Mark Huntington, MD, PHD's credentials? ▼
Mark Huntington, MD, PHD's NPI is 1326007469 with credentials MD, PHD. 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
View source datasets and methodology notes
- 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.
- 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
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.