Timothy Au, M.D.
NPI 1518287598 · Internal Medicine Physician · Honolulu, HI
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Timothy Au, M.D. is a Internal Medicine Physician provider in Honolulu, HI (NPI 1518287598).
Provider details
- NPI number
- 1518287598
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- MD 16852 (HI)
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
16 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
783 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 619 | $93 |
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 | 152 | $54 |
| Transitional Care Management Services for Problem of High Complexity99496 | 12 | $269 |
Typical Medicare-allowed amounts for these services range $54–$269 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote 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 · 86 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 584 | 178 |
| Amlodipine Besylate | 422 | 125 |
| Losartan Potassium | 287 | 87 |
| Levothyroxine Sodium | 212 | 57 |
| Simvastatin | 189 | 54 |
| Metformin Hcl | 148 | 49 |
| Empagliflozinbrand: Jardiance |
Practice location
Mailing address
Registry dates
- Enumerated
- 2010-06-01
- Last updated
- 2016-10-07
Frequently asked questions
- What is Timothy Au's NPI number?
- Timothy Au's National Provider Identifier (NPI) is 1518287598, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Timothy Au's specialty?
- Timothy Au is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Timothy Au located?
- Timothy Au's practice location on file with NPPES is 321 N Kuakini St, Honolulu, HI 96817-2364.
- What is Timothy Au's phone number?
- The practice phone number listed in the NPPES registry for Timothy Au is (808) 521-3885.
- Does Timothy Au accept Medicare?
- Timothy Au is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Timothy Au's NPI active?
- Yes — Timothy Au's NPI (1518287598) is active in the NPPES registry as of the last update on 2016-10-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.