Mikio Tachibana, MD
Internal Medicine Physician · Fountain Valley, CA
Mikio Tachibana, MD is an internal medicine physician with a practice address in Fountain Valley, California, and NPI 1598721227, issued on Apr 21, 2006. Check the license (California A35433, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Mikio Tachibana
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A35433 CA
Self-reported in NPPES; status is on the state search - Practice location
- 11100 Warner Ave, Fountain Valley, CA 92708
- Phone
- (714) 966-2800
- Enumerated
- Apr 21, 2006
- Record last updated
- Jul 13, 2026
- Fax
- (714) 966-0421
- Medicaid ID
- 00A354330 CA
- Medicare enrollment
- Enrolled (PECOS I20050520000343); may accept Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 11100 Warner Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Mikio Tachibana in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A35433Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
80% more Medicare Part D claims than the average internal medicine physician in 2024
5,718 Medicare Part D claims for 467 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium585 claims
- Amlodipine Besylate437 claims
- Losartan Potassium344 claims
- Rosuvastatin Calcium240 claims
- Metformin Hcl Er145 claims
- Hydrochlorothiazide136 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The MIPS final score for 2023 (Medicare payment program): 89.7 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $1,111.68
28 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Family Choice Aco IncWestminster, CA
- Perpetual Wound RescueAnaheim, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mikio Tachibana among 17,696 internal medicine physician records in California
Mikio Tachibana, MD is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1978 · median 2004 among the 11,065 with a school on file
- Record last updated2026 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
83 internal medicine physician records list a practice address in Fountain Valley
They are 83 of the 2,190 NPPES records with a practice address in Fountain Valley, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Fountain Valley → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Joel Bartlett, MDFountain Valley, CA 927081073518791
- Ihong Chen, MDFountain Valley, CA 927081104822535
- Naomi Cheung, MDFountain Valley, CA 927081073503314
- Alan Dang, M.D.Fountain Valley, CA 927081043217359
- Alton ForanFountain Valley, CA 927081619968799
- George Hong, MDFountain Valley, CA 927081154328532
- Brandon Khaw, MDFountain Valley, CA 927081568453637
- Lalita Komanapalli, MDFountain Valley, CA 927081578560884
Common questions
What is Mikio Tachibana, MD's NPI number?
Mikio Tachibana, MD's National Provider Identifier (NPI) is 1598721227, issued on Apr 21, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mikio Tachibana, MD located?
The NPPES record lists a practice address at 11100 Warner Ave, Fountain Valley, CA, 92708. Phone: (714) 966-2800. Providers update this record themselves, so call before visiting.
How can I verify Mikio Tachibana, MD's license?
NPPES lists California license number A35433, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mikio Tachibana, MD prescribe under Medicare Part D?
In 2024, Mikio Tachibana, MD had 5,718 Medicare Part D claims for 467 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Mikio Tachibana, MD's MIPS final score?
The 2023 MIPS final score is 89.7 of 100. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.