2026 NPPES data Otolaryngology Physician NPI 1306844949 M.D.
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WILLIAM HOFMANN, M.D.

Otolaryngology Physician in FORT ATKINSON, Wisconsin. 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
385
Medicare Part D claims · 145 beneficiaries · Otolaryngology Physician avg: 509
Generic prescribing
96%
generic claims · 4% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$69.59
1 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

WILLIAM HOFMANN, M.D. filed 385 Medicare Part D claims in 2023 as a Otolaryngology Physician in FORT ATKINSON, Wisconsin, prescribing 96% generic.

385
Part D claims, 2023
96%
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.

WILLIAM HOFMANN, M.D.'s Medicare Part D volume vs every U.S. prescriber

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

385 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 certification likely (heuristic — not verified)

WILLIAM HOFMANN, M.D. 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).

What does the federal data show about WILLIAM HOFMANN, M.D.?

Quality data not reported

NPI registry status

Active

Issued 07/08/2005

NPI 1306844949

Primary specialty

Otolaryngology Physician

Mid-sized

10,895 US NPIs in this specialty

Medicare Part D claims

385 24% vs specialty avg

2023 prescription claims

Specialty avg: 509

Specialty distribution in Wisconsin

How Otolaryngology Physician compares to other specialties among Wisconsin providers

Wisconsin providers

Otolaryngology Physician share within Wisconsin

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

Specialty board-certification context

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

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

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

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

WILLIAM HOFMANN, M.D. appears in the CMS NPPES registry as a Otolaryngology Physician provider holding M.D. credentials at 611 SHERMAN AVE E, FORT ATKINSON, WI, 53538, with a listed phone of (920) 563-6667. NPI 1306844949 was issued on 07/08/2005. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what HOFMANN 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 385 prescription claims written by this provider, covering 145 Medicare beneficiaries and totaling roughly $17K in drug spend, split 4% brand-name and 96% generic by claim count, with an opioid prescribing rate of 6.5%. 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.

Otolaryngology Physician is a mid-sized specialty nationwide, with 10,895 enrolled providers across 54 states and an average of 509 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

611 SHERMAN AVE E
FORT ATKINSON, WI 53538

Provider Details

NPI 1306844949
Specialty Otolaryngology Physician
Credentials M.D.
Gender Male
NPI Issued 07/08/2005

Hospital and facility affiliations

Facilities where WILLIAM HOFMANN, M.D. 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.

FORT HEALTHCARE INC
FORT ATKINSON, WI

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 WILLIAM HOFMANN, M.D.. Source: openpaymentsdata.cms.gov.

Total received

$70

Largest payer

Inspire Medical Systems, 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

WILLIAM HOFMANN, M.D. — brand share 4.0%
Specialty average (est.)

4% brand-name claims vs 96% generic, on 385 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.

385
Total Claims
$17K
Total Drug Cost
145
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
557
Total Day Supply
13,758
Brand vs Generic
4% brand / 96% generic
Brand Drug Cost
$6K
Generic Drug Cost
$10K
Opioid Claims
25 (6.5% rate)
Antibiotic Claims
47

Patient Demographics

Average Patient Age
71.6 years
Avg HCC Risk Score
1.05
Gender Split
59% female / 41% male
Age Distribution
<65: 20, 65-74: 66, 75-84: 45, 85+: 14

Top Prescribed Drugs (Medicare Part D)

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

What WILLIAM HOFMANN, 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
Fluticasone Propionate
78
Omeprazole
36
Ipratropium Bromide
28
Hydrocodone-Acetaminophen
Hydrocodone/Acetaminophen
22
Cefdinir
21
Nortriptyline Hcl
20
Nabumetone
18
Ofloxacin
14
Methylprednisolone
13
Prednisone
13

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

Otolaryngology Physician Overview

How WILLIAM HOFMANN, M.D. fits within the Otolaryngology Physician landscape nationally.

10,895
Otolaryngology Physician Providers in US
54
States with Otolaryngology Physician
509
Avg Claims per Provider

WILLIAM HOFMANN, M.D.'s 385 claims are below the specialty average of 509.

Nearby Otolaryngology Physician Providers in Wisconsin

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

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

Frequently Asked Questions

What is WILLIAM HOFMANN, M.D.'s specialty?
WILLIAM HOFMANN, M.D. specializes in Otolaryngology Physician and practices in FORT ATKINSON, Wisconsin. Credentials: M.D..
How much does WILLIAM HOFMANN, M.D. prescribe under Medicare Part D?
In 2023, WILLIAM HOFMANN, M.D. wrote 385 Medicare Part D claims totaling $17K in drug costs for 145 beneficiaries.
Where is WILLIAM HOFMANN, M.D. located?
WILLIAM HOFMANN, M.D. is located at 611 SHERMAN AVE E, FORT ATKINSON, WI, 53538. Phone: (920) 563-6667.
What is WILLIAM HOFMANN, M.D.'s NPI number?
WILLIAM HOFMANN, M.D.'s National Provider Identifier (NPI) is 1306844949, issued on 07/08/2005.
Does WILLIAM HOFMANN, M.D. prescribe more brand-name or generic drugs?
WILLIAM HOFMANN, M.D.'s prescribing is 4% brand-name and 96% generic drugs by claim count, with $6K in brand drug costs.
Does WILLIAM HOFMANN, M.D. prescribe opioids?
Yes, WILLIAM HOFMANN, M.D. had 25 opioid claims in 2023 with an opioid prescribing rate of 6.5%.
How many Otolaryngology Physician providers are there in the US?
There are 10,895 Otolaryngology Physician providers across 54 states in the US. The average Otolaryngology Physician provider writes 509 Medicare Part D claims per year.
What drugs does WILLIAM HOFMANN, M.D. prescribe most often?
Based on 2023 Medicare Part D data, WILLIAM HOFMANN, M.D.'s most frequently prescribed drugs include Fluticasone Propionate, Omeprazole, Ipratropium Bromide. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does WILLIAM HOFMANN, M.D. accept Medicare?
WILLIAM HOFMANN, M.D. appears in CMS Medicare data with 385 Part D claims and 145 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify WILLIAM HOFMANN, M.D.'s credentials?
WILLIAM HOFMANN, M.D.'s NPI is 1306844949 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