2026 NPPES data Ophthalmology Physician NPI 1447234984 MD
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KENNETH KNUDTSON, MD

Ophthalmology Physician in BROOKINGS, South Dakota. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
990
Medicare Part D claims · 173 beneficiaries · Ophthalmology Physician avg: 1K
Generic prescribing
72%
generic claims · 28% brand-name · higher generic rates reduce patient out-of-pocket costs
What the federal data reveals: KENNETH KNUDTSON, MD is a Ophthalmology Physician ([object Object]) practicing in BROOKINGS, South Dakota with a Medicare Part D prescribing footprint of 990 claims across 173 beneficiaries — 28% brand-name prescribing .

What stands out: KENNETH KNUDTSON, MD filed 990 Medicare Part D claims in 2023 across BROOKINGS, South Dakota. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board certification likely (heuristic — not verified)

KENNETH KNUDTSON, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation — signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

KENNETH KNUDTSON, MD at a glance

Quality data not reported

NPI registry status

Active

Issued 11/29/2005

NPI 1447234984

Primary specialty

Ophthalmology Physician

Mid-sized

22,090 US NPIs in this specialty

Medicare Part D claims

990 30% vs specialty avg

2023 prescription claims

Specialty avg: 1,420

Specialty distribution in South Dakota

How Ophthalmology Physician compares to other specialties among South Dakota providers

South Dakota providers

Ophthalmology Physician share within South Dakota

1. Ophthalmology Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Ophthalmology Physician share within South Dakota

Specialty board-certification context

Estimated specialty board-certified rate — Ophthalmology Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Ophthalmology Physician ABMS/AOA estimate

Est. board-certified rate (Ophthalmology Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Ophthalmology Physician) — ABMS / AOA estimate

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).

KENNETH KNUDTSON, MD is a Ophthalmology Physician provider practicing in BROOKINGS, South Dakota, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MD. NPI: 1447234984. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

KENNETH KNUDTSON, MD appears in the CMS NPPES registry as a Ophthalmology Physician provider holding MD credentials at 2311 YORKSHIRE DRIVE, BROOKINGS, SD, 57006, with a listed phone of (605) 692-7315. NPI 1447234984 was issued on 11/29/2005. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what KNUDTSON 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 990 prescription claims written by this provider, covering 173 Medicare beneficiaries and totaling roughly $38K in drug spend, split 28% brand-name and 72% generic by claim count. 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.

Ophthalmology Physician is a mid-sized specialty nationwide, with 22,090 enrolled providers across 56 states and an average of 1,420 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

2311 YORKSHIRE DRIVE
BROOKINGS, SD 57006

Provider Details

NPI 1447234984
Specialty Ophthalmology Physician
Credentials MD
Gender Male
NPI Issued 11/29/2005

Hospital and facility affiliations

Facilities where KENNETH KNUDTSON, 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.

CITY OF BROOKINGS
BROOKINGS, 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).

Brand vs generic prescribing mix · Above average

KENNETH KNUDTSON, MD — brand share 28.0%
Specialty average (est.)

28% brand-name claims vs 72% generic, on 990 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.

990
Total Claims
$38K
Total Drug Cost
173
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
1,315
Total Day Supply
34,320
Brand vs Generic
28% brand / 72% generic
Brand Drug Cost
$27K
Generic Drug Cost
$11K

Patient Demographics

Average Patient Age
78.1 years
Avg HCC Risk Score
0.95
Gender Split
60% female / 40% male

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

Drug Claims
Latanoprost
449
Timolol Maleate
121
Prednisolone Acetate
72
Brimonidine Tartrate
50
Dorzolamide-Timolol
Dorzolamide Hcl/Timolol Maleat
42
Moxifloxacin
Moxifloxacin Hcl
41
Ketorolac Tromethamine
40
Lumigan
Bimatoprost
40
Neomycin-Polymyxin-Dexameth
Neomycin/Polymyxin B/Dexametha
37
Combigan
Brimonidine Tartrate/Timolol
23

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Ophthalmology Physician Overview

How KENNETH KNUDTSON, MD fits within the Ophthalmology Physician landscape nationally.

22,090
Ophthalmology Physician Providers in US
56
States with Ophthalmology Physician
1,420
Avg Claims per Provider

KENNETH KNUDTSON, MD's 990 claims are below the specialty average of 1,420.

Nearby Ophthalmology Physician Providers in South Dakota

Other clinicians with the same primary specialty enrolled in South Dakota, drawn from the same CMS NPPES roster as KNUDTSON.

Compare Ophthalmology Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is KENNETH KNUDTSON, MD's specialty?
KENNETH KNUDTSON, MD specializes in Ophthalmology Physician and practices in BROOKINGS, South Dakota. Credentials: MD.
How much does KENNETH KNUDTSON, MD prescribe under Medicare Part D?
In 2023, KENNETH KNUDTSON, MD wrote 990 Medicare Part D claims totaling $38K in drug costs for 173 beneficiaries.
Where is KENNETH KNUDTSON, MD located?
KENNETH KNUDTSON, MD is located at 2311 YORKSHIRE DRIVE, BROOKINGS, SD, 57006. Phone: (605) 692-7315.
What is KENNETH KNUDTSON, MD's NPI number?
KENNETH KNUDTSON, MD's National Provider Identifier (NPI) is 1447234984, issued on 11/29/2005.
Does KENNETH KNUDTSON, MD prescribe more brand-name or generic drugs?
KENNETH KNUDTSON, MD's prescribing is 28% brand-name and 72% generic drugs by claim count, with $27K in brand drug costs.
How many Ophthalmology Physician providers are there in the US?
There are 22,090 Ophthalmology Physician providers across 56 states in the US. The average Ophthalmology Physician provider writes 1,420 Medicare Part D claims per year.
What drugs does KENNETH KNUDTSON, MD prescribe most often?
Based on 2023 Medicare Part D data, KENNETH KNUDTSON, MD's most frequently prescribed drugs include Latanoprost, Timolol Maleate, Prednisolone Acetate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does KENNETH KNUDTSON, MD accept Medicare?
KENNETH KNUDTSON, MD appears in CMS Medicare data with 990 Part D claims and 173 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify KENNETH KNUDTSON, MD's credentials?
KENNETH KNUDTSON, MD's NPI is 1447234984 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.
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