I-Fan Mau, MD, PHD
NPI 1780718791 · Otolaryngology Physician · Stanford, CA
Enrolled with Medicare as Practitioner - Otolaryngology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
I-Fan Mau, MD, PHD is a Otolaryngology Physician provider in Stanford, CA (NPI 1780718791).
Provider details
- NPI number
- 1780718791
- Entity type
- Individual
- Primary specialty
- Otolaryngology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD, PHD
- Sex
- Male
- Sole proprietor
- No
- License
- M8817 (TX)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
19 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
511 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) |
|---|---|---|
| Diagnostic Exam of Voice Box Using a Flexible Endoscope31575 | 109 | $122 |
| Injection of Chemical for Paralysis of Nerve Muscles on Side of Voice Box64617 | 108 | $230 |
| Exam to Assess Movement of Vocal Cord Flaps Using an Endoscope31579 | 78 | $179 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 51 | $124 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 50 | $88 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 2 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Acetaminophen With Codeinebrand: Acetaminophen-Codeine | 18 | 17 |
| Diazepam | 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)
- 801 Welch RdPalo Alto, CA 94304-1611Phone: (650) 724-1745
Registry dates
- Enumerated
- 2007-03-15
- Last updated
- 2025-07-01
- Certified
- 2025-06-29
Frequently asked questions
- What is I-Fan Mau's NPI number?
- I-Fan Mau's National Provider Identifier (NPI) is 1780718791, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is I-Fan Mau's specialty?
- I-Fan Mau is listed in the NPPES registry with a primary specialty of Otolaryngology Physician (Allopathic & Osteopathic Physicians).
- Where is I-Fan Mau located?
- I-Fan Mau's practice location on file with NPPES is 300 Pasteur Dr, Stanford, CA 94305-2200.
- What is I-Fan Mau's phone number?
- The practice phone number listed in the NPPES registry for I-Fan Mau is (650) 723-4000.
- Does I-Fan Mau accept Medicare?
- I-Fan Mau is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is I-Fan Mau's NPI active?
- Yes — I-Fan Mau's NPI (1780718791) is active in the NPPES registry as of the last update on 2025-07-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.