2026 NPPES data Family Medicine Physician NPI 1659711349 D.O.
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GARRETT FEDDERSEN, D.O.

Family Medicine Physician in STORM LAKE, Iowa. 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
236
Medicare Part D claims · 151 beneficiaries · Family Medicine Physician avg: 3K

What the federal data shows

GARRETT FEDDERSEN, D.O. filed 236 Medicare Part D claims in 2023 as a Family Medicine Physician in STORM LAKE, Iowa.

236
Part D claims, 2023

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.

GARRETT FEDDERSEN, D.O.'s Medicare Part D volume vs every U.S. prescriber

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

236 49th percentile higher than 49% 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)

GARRETT FEDDERSEN, D.O. 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 GARRETT FEDDERSEN, D.O.?

Quality data not reported

NPI registry status

Active

Issued 06/27/2013

NPI 1659711349

Primary specialty

Family Medicine Physician

High-volume

147,640 US NPIs in this specialty

Medicare Part D claims

236 93% vs specialty avg

2023 prescription claims

Specialty avg: 3,418

Specialty distribution in Iowa

How Family Medicine Physician compares to other specialties among Iowa providers

Iowa providers

Family Medicine Physician share within Iowa

1. Family Medicine Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Family Medicine Physician share within Iowa

Specialty board-certification context

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

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

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

0%100%78%
Est. board-certified rate (Family 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).

GARRETT FEDDERSEN, D.O. appears in the CMS NPPES registry as a Family Medicine Physician provider holding D.O. credentials at 1525 W 5TH ST, STORM LAKE, IA, 50588, with a listed phone of (712) 213-8676. NPI 1659711349 was issued on 06/27/2013. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what FEDDERSEN 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 236 prescription claims written by this provider, covering 151 Medicare beneficiaries and totaling roughly $7K in drug spend, with an opioid prescribing rate of 19.5%. 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.

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

1525 W 5TH ST
STORM LAKE, IA 50588

Provider Details

NPI 1659711349
Specialty Family Medicine Physician
Credentials D.O.
Gender Male
NPI Issued 06/27/2013

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

236
Total Claims
$7K
Total Drug Cost
151
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
236
Total Day Supply
2,162
Generic Drug Cost
$2K
Opioid Claims
46 (19.5% rate)
Antibiotic Claims
63

Patient Demographics

Average Patient Age
73.3 years
Avg HCC Risk Score
1.36
Gender Split
57% female / 43% male
Age Distribution
<65: 18, 65-74: 71, 75-84: 39, 85+: 23

Top Prescribed Drugs (Medicare Part D)

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

What GARRETT FEDDERSEN, D.O. 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
Hydrocodone-Acetaminophen
Hydrocodone/Acetaminophen
39
Prednisone
27
Cephalexin
24

* 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 GARRETT FEDDERSEN, D.O. 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

GARRETT FEDDERSEN, D.O.'s 236 claims are below the specialty average of 3,418.

Nearby Family Medicine Physician Providers in Iowa

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

Compare Family Medicine Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is GARRETT FEDDERSEN, D.O.'s specialty?
GARRETT FEDDERSEN, D.O. specializes in Family Medicine Physician and practices in STORM LAKE, Iowa. Credentials: D.O..
How much does GARRETT FEDDERSEN, D.O. prescribe under Medicare Part D?
In 2023, GARRETT FEDDERSEN, D.O. wrote 236 Medicare Part D claims totaling $7K in drug costs for 151 beneficiaries.
Where is GARRETT FEDDERSEN, D.O. located?
GARRETT FEDDERSEN, D.O. is located at 1525 W 5TH ST, STORM LAKE, IA, 50588. Phone: (712) 213-8676.
What is GARRETT FEDDERSEN, D.O.'s NPI number?
GARRETT FEDDERSEN, D.O.'s National Provider Identifier (NPI) is 1659711349, issued on 06/27/2013.
Does GARRETT FEDDERSEN, D.O. prescribe opioids?
Yes, GARRETT FEDDERSEN, D.O. had 46 opioid claims in 2023 with an opioid prescribing rate of 19.5%.
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 GARRETT FEDDERSEN, D.O. prescribe most often?
Based on 2023 Medicare Part D data, GARRETT FEDDERSEN, D.O.'s most frequently prescribed drugs include Hydrocodone-Acetaminophen, Prednisone, Cephalexin. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does GARRETT FEDDERSEN, D.O. accept Medicare?
GARRETT FEDDERSEN, D.O. appears in CMS Medicare data with 236 Part D claims and 151 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify GARRETT FEDDERSEN, D.O.'s credentials?
GARRETT FEDDERSEN, D.O.'s NPI is 1659711349 with credentials D.O.. 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