2026 NPPES data Emergency Medical Services (Emergency Medicine) Physician NPI 1669544623 M.D.
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THOMAS KOEHNEN, M.D.

Emergency Medical Services (Emergency Medicine) Physician in SAINT JAMES, Minnesota. 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
380
Medicare Part D claims · 31 beneficiaries · Emergency Medical Services (Emergency Medicine) Physician avg: 394
Generic prescribing
95%
generic claims · 5% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

THOMAS KOEHNEN, M.D. filed 380 Medicare Part D claims in 2023 as a Emergency Medical Services (Emergency Medicine) Physician in SAINT JAMES, Minnesota, prescribing 95% generic.

380
Part D claims, 2023
95%
generic prescribing

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.

THOMAS KOEHNEN, M.D.'s Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023 — across all CMS prescribers nationally

380 Top 43% higher than 57% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). This entry sits in this band. 400–600: 90,619 prescribers (7%). Above this entry. 600–800: 56,224 prescribers (4%). Above this entry. 800–1,000: 40,919 prescribers (3%). Above this entry. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2,000–2,200: 213,991 prescribers (16%). Above this entry. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

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-eligible specialty (heuristic — not verified)

THOMAS KOEHNEN, M.D. practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).

What does the federal data show about THOMAS KOEHNEN, M.D.?

Quality data not reported

NPI registry status

Active

Issued 11/14/2006

NPI 1669544623

Primary specialty

Emergency Medical Services (Emergency Medicine) Physician

Niche

3,616 US NPIs in this specialty

Medicare Part D claims

380 4% vs specialty avg

2023 prescription claims

Specialty avg: 394

Specialty distribution in Minnesota

How Emergency Medical Services (Emergency Medicine) Physician compares to other specialties among Minnesota providers

Minnesota providers

Emergency Medical Services (Emergency Medicine) Physician share within Minnesota

1. Emergency Medical Services (Emergency Medicine) Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Emergency Medical Services (Emergency Medicine) Physician share within Minnesota

Specialty board-certification context

Estimated specialty board-certified rate — Emergency Medical Services (Emergency Medicine) Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Emergency Medical Services (Emergency Medicine) Physician ABMS/AOA estimate

Est. board-certified rate (Emergency Medical Services (Emergency Medicine) Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Emergency Medical Services (Emergency Medicine) 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).

THOMAS KOEHNEN, M.D. appears in the CMS NPPES registry as a Emergency Medical Services (Emergency Medicine) Physician provider holding M.D. credentials at 38818 730TH AVE, SAINT JAMES, MN, 56081, with a listed phone of (507) 375-7321. NPI 1669544623 was issued on 11/14/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what KOEHNEN 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 380 prescription claims written by this provider, covering 31 Medicare beneficiaries and totaling roughly $10K in drug spend, split 5% brand-name and 95% 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.

Emergency Medical Services (Emergency Medicine) Physician is a narrow specialty nationwide, with 3,616 enrolled providers across 55 states and an average of 394 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

38818 730TH AVE
SAINT JAMES, MN 56081

Provider Details

NPI 1669544623
Specialty Emergency Medical Services (Emergency Medicine) Physician
Credentials M.D.
Gender Male
NPI Issued 11/14/2006

Brand vs generic prescribing mix · Generic-heavy

THOMAS KOEHNEN, M.D. — brand share 5.0%
Specialty average (est.)

5% brand-name claims vs 95% generic, on 380 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.

380
Total Claims
$10K
Total Drug Cost
31
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
521
Total Day Supply
13,289
Brand vs Generic
5% brand / 95% generic
Brand Drug Cost
$341
Generic Drug Cost
$9K

Patient Demographics

Average Patient Age
77.0 years
Avg HCC Risk Score
1.05
Gender Split
39% female / 61% male

Top Prescribed Drugs (Medicare Part D)

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

What THOMAS KOEHNEN, M.D. prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Simvastatin
29
Escitalopram Oxalate
24
Furosemide
23
Gabapentin
23
Potassium Chloride
23
Spironolactone
23
Lisinopril
20
Hydrochlorothiazide
18
Atenolol
14
Rosuvastatin Calcium
14

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

Emergency Medical Services (Emergency Medicine) Physician Overview

How THOMAS KOEHNEN, M.D. fits within the Emergency Medical Services (Emergency Medicine) Physician landscape nationally.

3,616
Emergency Medical Services (Emergency Medicine) Physician Providers in US
55
States with Emergency Medical Services (Emergency Medicine) Physician
394
Avg Claims per Provider

THOMAS KOEHNEN, M.D.'s 380 claims are below the specialty average of 394.

Nearby Emergency Medical Services (Emergency Medicine) Physician Providers in Minnesota

Other clinicians with the same primary specialty enrolled in Minnesota, drawn from the same CMS NPPES roster as KOEHNEN.

Compare Emergency Medical Services (Emergency Medicine) Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is THOMAS KOEHNEN, M.D.'s specialty?
THOMAS KOEHNEN, M.D. specializes in Emergency Medical Services (Emergency Medicine) Physician and practices in SAINT JAMES, Minnesota. Credentials: M.D..
How much does THOMAS KOEHNEN, M.D. prescribe under Medicare Part D?
In 2023, THOMAS KOEHNEN, M.D. wrote 380 Medicare Part D claims totaling $10K in drug costs for 31 beneficiaries.
Where is THOMAS KOEHNEN, M.D. located?
THOMAS KOEHNEN, M.D. is located at 38818 730TH AVE, SAINT JAMES, MN, 56081. Phone: (507) 375-7321.
What is THOMAS KOEHNEN, M.D.'s NPI number?
THOMAS KOEHNEN, M.D.'s National Provider Identifier (NPI) is 1669544623, issued on 11/14/2006.
Does THOMAS KOEHNEN, M.D. prescribe more brand-name or generic drugs?
THOMAS KOEHNEN, M.D.'s prescribing is 5% brand-name and 95% generic drugs by claim count, with $341 in brand drug costs.
How many Emergency Medical Services (Emergency Medicine) Physician providers are there in the US?
There are 3,616 Emergency Medical Services (Emergency Medicine) Physician providers across 55 states in the US. The average Emergency Medical Services (Emergency Medicine) Physician provider writes 394 Medicare Part D claims per year.
What drugs does THOMAS KOEHNEN, M.D. prescribe most often?
Based on 2023 Medicare Part D data, THOMAS KOEHNEN, M.D.'s most frequently prescribed drugs include Simvastatin, Escitalopram Oxalate, Furosemide. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does THOMAS KOEHNEN, M.D. accept Medicare?
THOMAS KOEHNEN, M.D. appears in CMS Medicare data with 380 Part D claims and 31 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify THOMAS KOEHNEN, M.D.'s credentials?
THOMAS KOEHNEN, M.D.'s NPI is 1669544623 with credentials M.D.. 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