Robert Tsou, M.D.
NPI 1801999107 · Otolaryngology Physician · Apple Valley, CA
Robert Tsou, M.D. is a Otolaryngology Physician provider in Apple Valley, CA (NPI 1801999107).
Provider details
- NPI number
- 1801999107
- Entity type
- Individual
- Primary specialty
- Otolaryngology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- C41287 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 2 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Ipratropium Bromide | 12 |
| Azithromycin | 12 |
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
Registry dates
- Enumerated
- 2006-09-06
- Last updated
- 2021-03-10
- Certified
- 2021-03-10
Frequently asked questions
- What is Robert Tsou's NPI number?
- Robert Tsou's National Provider Identifier (NPI) is 1801999107, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Robert Tsou's specialty?
- Robert Tsou is listed in the NPPES registry with a primary specialty of Otolaryngology Physician (Allopathic & Osteopathic Physicians).
- Where is Robert Tsou located?
- Robert Tsou's practice location on file with NPPES is 15963 Quantico Rd, Apple Valley, CA 92307-1301.
- What is Robert Tsou's phone number?
- The practice phone number listed in the NPPES registry for Robert Tsou is (760) 242-8100.
- Is Robert Tsou's NPI active?
- Yes — Robert Tsou's NPI (1801999107) is active in the NPPES registry as of the last update on 2021-03-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.