Tun Oo
NPI 1477973865 · Internal Medicine Physician · Lancaster, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Tun Oo is a Internal Medicine Physician provider in Lancaster, CA (NPI 1477973865).
Provider details
- NPI number
- 1477973865
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- No
- License
- A147144 (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
12 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 · 70 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 379 | 160 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 172 | 50 |
| Rosuvastatin Calcium | 168 | 68 |
| Amlodipine Besylate | 164 | 72 |
| Lisinopril | 156 | 70 |
| Losartan Potassium | 153 | 62 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2014-04-24
- Last updated
- 2021-12-08
Frequently asked questions
- What is Tun Oo's NPI number?
- Tun Oo's National Provider Identifier (NPI) is 1477973865, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Tun Oo's specialty?
- Tun Oo is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Tun Oo located?
- Tun Oo's practice location on file with NPPES is 43112 15th St W, Lancaster, CA 93534-6219.
- What is Tun Oo's phone number?
- The practice phone number listed in the NPPES registry for Tun Oo is (310) 437-9421.
- Does Tun Oo accept Medicare?
- Tun Oo is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Tun Oo's NPI active?
- Yes — Tun Oo's NPI (1477973865) is active in the NPPES registry as of the last update on 2021-12-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.