Di Yan, MD
NPI 1841795671 · Dermatology Physician · Madison, WI
Enrolled with Medicare as Practitioner - Dermatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Di Yan, MD is a Dermatology Physician provider in Madison, WI (NPI 1841795671).
Provider details
- NPI number
- 1841795671
- Entity type
- Individual
- Primary specialty
- Dermatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 82556 (WI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
8 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
2,902 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Pathology Examination of Tissue Using a Microscope, Intermediate Complexity88305 | 1,759 | $35 |
| Special Stained Specimen Slides to Examine Tissue, Each Additional Procedure88341 | 243 | $26 |
| Special Stained Specimen Slides to Examine Tissue, Initial Procedure88342 | 230 | $32 |
| Special Stained Specimen Slides to Identify Organisms Including Interpretation and Report88312 | 156 | $25 |
| Destruction of Precancer Skin Growth, 2-14 Growths17003 | 67 | $2 |
| Pathology Examination of Tissue Using a Microscope, Moderately Low Complexity88304 | 61 | $10 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 3 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Ketoconazole | 15 |
| Ixekizumabbrand: Taltz Autoinjector | 14 |
| Prednisone | 13 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Additional practice locations (1)
- 925 Seneca StSeattle, WA 98101-2742Phone: (206) 583-6079
Registry dates
- Enumerated
- 2018-03-25
- Last updated
- 2023-10-24
- Certified
- 2023-10-24
Frequently asked questions
- What is Di Yan's NPI number?
- Di Yan's National Provider Identifier (NPI) is 1841795671, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Di Yan's specialty?
- Di Yan is listed in the NPPES registry with a primary specialty of Dermatology Physician (Allopathic & Osteopathic Physicians).
- Where is Di Yan located?
- Di Yan's practice location on file with NPPES is 451 Junction Rd, Madison, WI 53717-2656.
- What is Di Yan's phone number?
- The practice phone number listed in the NPPES registry for Di Yan is (608) 265-7670.
- Does Di Yan accept Medicare?
- Di Yan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Di Yan's NPI active?
- Yes — Di Yan's NPI (1841795671) is active in the NPPES registry as of the last update on 2023-10-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.