NPI registry status
Active
2026 NPPES data Sleep Medicine (Internal Medicine) Physician NPI 1588671796 MD
Verify on CMS → Stefanie Nunez, MD
Sleep Medicine (Internal Medicine) Physician in Renton, Washington.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 859 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.
Prescribing volume
1K
Medicare Part D claims · 203 beneficiaries · Sleep Medicine (Internal Medicine) Physician avg: 1K
Generic prescribing
29%
generic claims · 71% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Stefanie Nunez, MD filed 1,162 Medicare Part D claims in 2023 as a Sleep Medicine (Internal Medicine) Physician in Renton, Washington, prescribing 29% generic.
- 1K
- Part D claims, 2023
- 29%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥77th
- 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 Stefanie Nunez, MD
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 1588671796), first enumerated 08/01/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 1,162 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
- State context
State board disciplinary context
Washington statewide board action statistics are published annually — these figures describe aggregate state activity, not Stefanie Nunez, MD's individual license status. Verify directly with the state medical board.
Source: WMC annual report 2023
- 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 1588671796 · Sleep Medicine (Internal Medicine) Physician
NPI-10 · ENUM-LEGACY · TAX-NARROW · RX-MID · BOOK-THIN · PHOTO-ENUM
- NPI-10 1588671796
- ENUM-LEGACY 2006
- TAX-NARROW 859
- RX-MID 1,162
- BOOK-THIN 34 in Washington
- PHOTO-ENUM Stephen Brown · 2006
Stefanie Nunez, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
1,162 ≥ 77th percentile 77% 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)
Stefanie Nunez, 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 Stefanie Nunez, MD?
Quality data not reportedPrimary specialty
Sleep Medicine (Internal Medicine) Physician
Medicare Part D claims
1,162 11% vs specialty avg
Specialty distribution in Washington
How Sleep Medicine (Internal Medicine) Physician compares to other specialties among Washington 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 | 1588671796 |
|---|---|
| Specialty | Sleep Medicine (Internal Medicine) Physician |
| Credentials | MD |
| Gender | Female |
| NPI Issued | 08/01/2006 |
Hospital and facility affiliations
Facilities where Stefanie Nunez, 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.
Valley Medical Group-Renton
Renton, WA
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
License & disciplinary context - Washington WMC 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~34K Washington medical licensees in 2023 - they are NOT specific to Stefanie Nunez, MD. To verify Stefanie Nunez, MD's current license status, search the WMC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
88
Total board actions, Washington 2023
Across 85 cases
2.59
Actions per 1,000 licensees
Washington statewide rate
probation
Most common action type
31 cases
WMC publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the Washington disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Brand-heavy
Stefanie Nunez, MD - brand share 71.0%
Sleep Medicine (Internal Medicine) Physician average
71% brand-name claims vs 29% generic, on 1,162 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.
1,162
Total Claims
$755K
Total Drug Cost
203
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,973
- Total Day Supply
- 56,968
- Brand vs Generic
- 71% brand / 29% generic
- Brand Drug Cost
- $694K
- Generic Drug Cost
- $61K
- Antibiotic Claims
- 41
Patient Demographics
- Average Patient Age
- 73.2 years
- Avg HCC Risk Score
- 1.58
- Gender Split
- 64% female / 36% male
- Age Distribution
- <65: 25, 65-74: 83, 75-84: 78, 85+: 17
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Stefanie Nunez, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Albuterol Sulfate …
Albuterol Sulfate Hfa
210 claims
- Stiolto Respimat
Stiolto Respimat
92 claims
- Anoro Ellipta
Anoro Ellipta
91 claims
- Symbicort 76
Symbicort
76 claims
- Trelegy Ellipta 61
Trelegy Ellipta
61 claims
- Spiriva Handihaler 56
Spiriva Handihaler
56 claims
- Prednisone 45
Prednisone
45 claims
- Ventolin Hfa 37
Ventolin Hfa
37 claims
| Drug | Claims |
|---|---|
| Albuterol Sulfate Hfa Albuterol Sulfate | 210 |
| Stiolto Respimat Tiotropium Br/Olodaterol Hcl | 92 |
| Anoro Ellipta Umeclidinium Brm/Vilanterol Tr | 91 |
| Symbicort Budesonide/Formoterol Fumarate | 76 |
| Trelegy Ellipta Fluticasone/Umeclidin/Vilanter | 61 |
| Spiriva Handihaler Tiotropium Bromide | 56 |
| Prednisone | 45 |
| Ventolin Hfa Albuterol Sulfate | 37 |
| Incruse Ellipta Umeclidinium Bromide | 31 |
| Bevespi Aerosphere Glycopyrrolate/Formoterol Fum | 30 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Sleep Medicine (Internal Medicine) Physician in WA →
All providers in Washington →
Compare specialties →
Sleep Medicine (Internal Medicine) Physician Overview
How Stefanie Nunez, MD fits within the Sleep Medicine (Internal Medicine) Physician landscape nationally.
859
Sleep Medicine (Internal Medicine) Physician Providers in US
52
States with Sleep Medicine (Internal Medicine) Physician
1,310
Avg Claims per Provider
Stefanie Nunez, MD's 1,162 claims are below the specialty average of 1,310.
Nationwide Sleep Medicine (Internal Medicine) Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Nunez, both outside Washington 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 Washington
Other clinicians with the same primary specialty enrolled in Washington, drawn from the same CMS NPPES roster as Nunez.
One of 34 Sleep Medicine (Internal Medicine) Physician providers enrolled in Washington, 5 are shown here.
Dr. Mudassar Ahmad
MB,BS
Tacoma, WA
Dr. Abdullah Arjomand
M.D.
Tacoma, WA
Dr. Martha Billings
M.D.
Seattle, WA
Dr. Yoon Hee Chang
MD
Kirkland, WA
Dr. Wynne Chen
MD
Seattle, WA
Compare Sleep Medicine (Internal Medicine) Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Stefanie Nunez, MD's specialty? ▼
Stefanie Nunez, MD specializes in Sleep Medicine (Internal Medicine) Physician and practices in Renton, Washington. Credentials: MD.
How much does Stefanie Nunez, MD prescribe under Medicare Part D? ▼
In 2023, Stefanie Nunez, MD wrote 1,162 Medicare Part D claims totaling $755K in drug costs for 203 beneficiaries.
Where is Stefanie Nunez, MD located? ▼
Stefanie Nunez, MD is located at 4011 TALBOT RD S, Renton, WA, 98055. Phone: (425) 251-5110.
What is Stefanie Nunez, MD's NPI number? ▼
Stefanie Nunez, MD's National Provider Identifier (NPI) is 1588671796, issued on 08/01/2006.
Does Stefanie Nunez, MD prescribe more brand-name or generic drugs? ▼
Stefanie Nunez, MD's prescribing is 71% brand-name and 29% generic drugs by claim count, with $694K in brand drug costs.
How many Sleep Medicine (Internal Medicine) Physician providers are there in the US? ▼
There are 859 Sleep Medicine (Internal Medicine) Physician providers across 52 states in the US. The average Sleep Medicine (Internal Medicine) Physician provider writes 1,310 Medicare Part D claims per year.
What drugs does Stefanie Nunez, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Stefanie Nunez, MD's most frequently prescribed drugs include Albuterol Sulfate Hfa, Stiolto Respimat, Anoro Ellipta. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Stefanie Nunez, MD accept Medicare? ▼
Stefanie Nunez, MD appears in CMS Medicare data with 1,162 Part D claims and 203 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Stefanie Nunez, MD's credentials? ▼
Stefanie Nunez, MD's NPI is 1588671796 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.
- 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.