NPI registry status
Active
2026 NPPES data Sleep Medicine (Otolaryngology) Physician NPI 1659719235 M.D.
Verify on CMS → Alexander Claussen, M.D.
Sleep Medicine (Otolaryngology) Physician in Iowa City, Iowa.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 98 in Sleep Medicine (Otolaryngology) 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
21
Medicare Part D claims · 13 beneficiaries · Sleep Medicine (Otolaryngology) Physician avg: 543
Industry payments
$305.21
2 payments · CMS Open Payments (Sunshine Act)
What the federal data shows
Alexander Claussen, M.D. filed 21 Medicare Part D claims in 2023 as a Sleep Medicine (Otolaryngology) Physician in Iowa City, Iowa.
- 21
- Part D claims, 2023
- Likely
- board-certified (heuristic)
- ≥0th
- pct by Part D claim volume (lower-bound band)
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.
Federal trust snapshot
What official records show about Alexander Claussen, M.D.
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1659719235), first enumerated 06/05/2013.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 21 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- Reported
Industry payment transparency
$305.21 in reported industry payments (2 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1659719235 · Sleep Medicine (Otolaryngology) Physician
NPI-10 · ENUM-MID · TAX-TRACE · RX-TRACE · BOOK-THIN · PHOTO-ENUM
- NPI-10 1659719235
- ENUM-MID 2013
- TAX-TRACE 98
- RX-TRACE 21
- BOOK-THIN 2 in Iowa
- PHOTO-ENUM Raluca Gray · 2013
Alexander Claussen, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
21 ≥ 0th percentile 0% of 1,370,886 prescribers are in lower value bands
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.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2023
✓
Board certification likely (heuristic, not verified)
Alexander Claussen, 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 Alexander Claussen, M.D.?
Quality data not reportedPrimary specialty
Sleep Medicine (Otolaryngology) Physician
Medicare Part D claims
21 96% vs specialty avg
Specialty distribution in Iowa
How Sleep Medicine (Otolaryngology) Physician compares to other specialties among Iowa 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 Sleep Medicine (Otolaryngology) 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).
Practice Address
Provider Details
| NPI | 1659719235 |
|---|---|
| Specialty | Sleep Medicine (Otolaryngology) Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 06/05/2013 |
Hospital and facility affiliations
Facilities where Alexander Claussen, 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.
State University OF Iowa
Iowa City, IA
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 Alexander Claussen, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$305
Largest payer
iotaMotion, 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.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
21
Total Claims
$803
Total Drug Cost
13
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 21
- Total Day Supply
- 342
- Generic Drug Cost
- $762
Patient Demographics
- Average Patient Age
- 72.0 years
- Avg HCC Risk Score
- 0.86
More Sleep Medicine (Otolaryngology) Physician in IA →
All providers in Iowa →
Compare specialties →
Sleep Medicine (Otolaryngology) Physician Overview
How Alexander Claussen, M.D. fits within the Sleep Medicine (Otolaryngology) Physician landscape nationally.
98
Sleep Medicine (Otolaryngology) Physician Providers in US
29
States with Sleep Medicine (Otolaryngology) Physician
543
Avg Claims per Provider
Alexander Claussen, M.D.'s 21 claims are below the specialty average of 543.
Nationwide Sleep Medicine (Otolaryngology) Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Claussen, both outside Iowa so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2013)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Sleep Medicine (Otolaryngology) Physician Providers in Iowa
Other clinicians with the same primary specialty enrolled in Iowa, drawn from the same CMS NPPES roster as Claussen.
Compare Sleep Medicine (Otolaryngology) Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Alexander Claussen, M.D.'s specialty? ▼
Alexander Claussen, M.D. specializes in Sleep Medicine (Otolaryngology) Physician and practices in Iowa City, Iowa. Credentials: M.D..
How much does Alexander Claussen, M.D. prescribe under Medicare Part D? ▼
In 2023, Alexander Claussen, M.D. wrote 21 Medicare Part D claims totaling $803 in drug costs for 13 beneficiaries.
Where is Alexander Claussen, M.D. located? ▼
Alexander Claussen, M.D. is located at 200 HAWKINS DR, Iowa City, IA, 52242. Phone: (319) 356-3574.
What is Alexander Claussen, M.D.'s NPI number? ▼
Alexander Claussen, M.D.'s National Provider Identifier (NPI) is 1659719235, issued on 06/05/2013.
How many Sleep Medicine (Otolaryngology) Physician providers are there in the US? ▼
There are 98 Sleep Medicine (Otolaryngology) Physician providers across 29 states in the US. The average Sleep Medicine (Otolaryngology) Physician provider writes 543 Medicare Part D claims per year.
Does Alexander Claussen, M.D. accept Medicare? ▼
Alexander Claussen, M.D. appears in CMS Medicare data with 21 Part D claims and 13 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Alexander Claussen, M.D.'s credentials? ▼
Alexander Claussen, M.D.'s NPI is 1659719235 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
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.