Wiley Fan, DO
NPI 1811939572 · Infectious Disease Physician · Farmington Hills, MI
Enrolled with Medicare as Practitioner - Infectious Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Wiley Fan, DO is a Infectious Disease Physician provider in Farmington Hills, MI (NPI 1811939572).
Provider details
- NPI number
- 1811939572
- Entity type
- Individual
- Primary specialty
- Infectious Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- 5101007795 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
220 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 89 | $78 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 45 | $132 |
| Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes99231 | 36 | $49 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 30 | $119 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 20 | $175 |
Typical Medicare-allowed amounts for these services range $49–$175 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 9 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Bictegrav/Emtricit/Tenofov Alabrand: Biktarvy | 39 |
| Daptomycin | 17 |
| Ceftriaxone Sodiumbrand: Ceftriaxone | 16 |
| Ertapenem Sodiumbrand: Ertapenem | 14 |
| Abacavir Sulfate/Lamivudinebrand: Abacavir-Lamivudine | 12 |
| Ritonavir | 12 |
| Abacavir/Dolutegravir/Lamivudibrand: Triumeq | 12 |
| Vancomycin Hcl | 11 |
| Efavirenz/Emtricit/Tenofovr Dfbrand: Efavirenz-Emtric-Tenofov Disop | 11 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-06-10
- Last updated
- 2020-11-17
- Certified
- 2020-11-17
Frequently asked questions
- What is Wiley Fan's NPI number?
- Wiley Fan's National Provider Identifier (NPI) is 1811939572, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Wiley Fan's specialty?
- Wiley Fan is listed in the NPPES registry with a primary specialty of Infectious Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Wiley Fan located?
- Wiley Fan's practice location on file with NPPES is 28080 Grand River Ave Ste 306n, Farmington Hills, MI 48336-5966.
- What is Wiley Fan's phone number?
- The practice phone number listed in the NPPES registry for Wiley Fan is (947) 521-8314.
- Does Wiley Fan accept Medicare?
- Wiley Fan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Wiley Fan's NPI active?
- Yes — Wiley Fan's NPI (1811939572) is active in the NPPES registry as of the last update on 2020-11-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.