Mikio Tachibana, MD
NPI 1598721227 · Internal Medicine Physician · Fountain Valley, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mikio Tachibana, MD is a Internal Medicine Physician provider in Fountain Valley, CA (NPI 1598721227).
Provider details
- NPI number
- 1598721227
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- License
- A35433 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,436 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 256 | $132 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 253 | $94 |
| Chronic Care Management Services, First 20 Minutes of Clinical Staff Time Directed By Health Care Professional, Per Calendar Month99490 | 171 | $68 |
| Administration of Influenza Virus VaccineG0008 | 139 | $35 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 137 | $9 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 83 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 585 | 174 |
| Amlodipine Besylate | 437 | 129 |
| Losartan Potassium | 344 | 104 |
| Rosuvastatin Calcium | 240 | 75 |
| Metformin Hclbrand: Metformin Hcl Er | 145 | 47 |
| Hydrochlorothiazide | 136 | 38 |
| Tamsulosin Hcl |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,112 across 28 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-04-21
- Last updated
- 2007-07-08
Frequently asked questions
- What is Mikio Tachibana's NPI number?
- Mikio Tachibana's National Provider Identifier (NPI) is 1598721227, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mikio Tachibana's specialty?
- Mikio Tachibana is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mikio Tachibana located?
- Mikio Tachibana's practice location on file with NPPES is 11100 Warner Ave, Fountain Valley, CA 92708.
- What is Mikio Tachibana's phone number?
- The practice phone number listed in the NPPES registry for Mikio Tachibana is (714) 966-2800.
- Does Mikio Tachibana accept Medicare?
- Mikio Tachibana is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mikio Tachibana's NPI active?
- Yes — Mikio Tachibana's NPI (1598721227) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.