NPI registry status
Active
2026 NPPES data Sleep Medicine (Internal Medicine) Physician NPI 1063430833 MD
Verify on CMS → Jacalyn Nelson, MD
Sleep Medicine (Internal Medicine) Physician in Fitchburg, Wisconsin.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 932 in Sleep Medicine (Internal Medicine) 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.
What the federal data shows
Jacalyn Nelson, MD is a Sleep Medicine (Internal Medicine) Physician in Fitchburg, Wisconsin, listed in the federal CMS National Provider Identifier registry.
- Likely
- board-certified (heuristic)
- #259
- Sleep Medicine (Internal Medicine) Physician rank among Wisconsin specialties
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 Jacalyn Nelson, MD
Federal registry listing with board-eligibility signals — verify credentials with the state medical board before clinical decisions.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1063430833), first enumerated 07/18/2006.
Source: CMS NPPES
- Not in federal data
Medicare Part D participation
No 2023 Medicare Part D prescribing volume appears in the CMS public file for this NPI (may reflect specialty, new enrollment, or non-prescribing role).
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
- 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 1063430833 · Sleep Medicine (Internal Medicine) Physician
NPI-10 · ENUM-LEGACY · TAX-NARROW · RX-NONE · BOOK-THIN · PHOTO-ENUM
- NPI-10 1063430833
- ENUM-LEGACY 2006
- TAX-NARROW 932
- RX-NONE No Part D
- BOOK-THIN 14 in Wisconsin
- PHOTO-ENUM Charlie Lan, D.O. · 2006
✓
Board certification likely (heuristic, not verified)
Jacalyn Nelson, 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).
What does the federal data show about Jacalyn Nelson, MD?
Quality data not reportedPrimary specialty
Sleep Medicine (Internal Medicine) Physician
Specialty distribution in Wisconsin
How Sleep Medicine (Internal Medicine) Physician compares to other specialties among Wisconsin 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 (Internal Medicine) 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 | 1063430833 |
|---|---|
| Specialty | Sleep Medicine (Internal Medicine) Physician |
| Credentials | MD |
| Gender | Female |
| NPI Issued | 07/18/2006 |
Hospital and facility affiliations
Facilities where Jacalyn Nelson, 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.
Dean Health Systems Inc
Fitchburg, 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).
More Sleep Medicine (Internal Medicine) Physician in WI →
All providers in Wisconsin →
Compare specialties →
Sleep Medicine (Internal Medicine) Physician Overview
How Jacalyn Nelson, MD fits within the Sleep Medicine (Internal Medicine) Physician landscape nationally.
932
Sleep Medicine (Internal Medicine) Physician Providers in US
52
States with Sleep Medicine (Internal Medicine) Physician
1,288
Avg Claims per Provider
Nationwide Sleep Medicine (Internal Medicine) Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Nelson, both outside Wisconsin so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Sleep Medicine (Internal Medicine) Physician Providers in Wisconsin
Other clinicians with the same primary specialty enrolled in Wisconsin, drawn from the same CMS NPPES roster as Nelson.
One of 14 Sleep Medicine (Internal Medicine) Physician providers enrolled in Wisconsin, 5 are shown here.
Dr. Dima Adl
MD
Milwaukee, WI
Dr. Ewa Alexander
MD
Fitchburg, WI
Dr. Iftekhar Bader
M.D.
Racine, WI
Dr. Quinn Bongers
MD
Madison, WI
Dr. Ryan Butcher
DO
Fond Du Lac, WI
Compare Sleep Medicine (Internal Medicine) Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Jacalyn Nelson, MD's specialty? ▼
Jacalyn Nelson, MD specializes in Sleep Medicine (Internal Medicine) Physician and practices in Fitchburg, Wisconsin. Credentials: MD.
Where is Jacalyn Nelson, MD located? ▼
Jacalyn Nelson, MD is located at 2844 INDEX RD, Fitchburg, WI, 53713. Phone: (608) 229-7979.
What is Jacalyn Nelson, MD's NPI number? ▼
Jacalyn Nelson, MD's National Provider Identifier (NPI) is 1063430833, issued on 07/18/2006.
How many Sleep Medicine (Internal Medicine) Physician providers are there in the US? ▼
There are 932 Sleep Medicine (Internal Medicine) Physician providers across 52 states in the US. The average Sleep Medicine (Internal Medicine) Physician provider writes 1,288 Medicare Part D claims per year.
Does Jacalyn Nelson, MD accept Medicare? ▼
Jacalyn Nelson, MD appears in CMS Medicare data. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Jacalyn Nelson, MD's credentials? ▼
Jacalyn Nelson, MD's NPI is 1063430833 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
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.
- 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 August 2026 (NPPES) / 2024 (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 August 2026.