Brett Henry Holko, D.O.
Internal Medicine Physician · Bonita, CA
Brett Henry Holko, D.O. is an internal medicine physician with a practice address in Bonita, California, and NPI 1740398213, issued on Aug 26, 2006. Check the license (California 20A8540, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Brett Henry Holko
- Credential
- D.O.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 20A8540 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3955 Bonita RD, Bonita, CA 91902
- Phone
- (800) 290-5000
- Enumerated
- Aug 26, 2006
- Record last updated
- Nov 29, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20101130001075); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 3955 Bonita RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Cristina BahenaBehavior Technician1710582226
- Julie Ball, PHARMDPharmacist1720266240
- Isaac Davis, DOInternal Medicine Physician1487232419
- Michele Dumstorff, PHARM. D.Pharmacist1396923967
- Jacqueline Haro, O.D.Optometrist1275797888
- Sarah Herrera, MDFamily Medicine Physician1356927313
Verify Brett Henry Holko in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A8540Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
100% more Medicare Part D claims than the average internal medicine physician in 2024
6,341 Medicare Part D claims for 1,187 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 83 claims were for opioids.
Most prescribed
- Atorvastatin Calcium527 claims
- Lisinopril339 claims
- Amlodipine Besylate304 claims
- Losartan Potassium279 claims
- Levothyroxine Sodium228 claims
- Rosuvastatin Calcium227 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.
Bills Medicare through one group practice
- Southern California Permanente Medical GroupSan Diego, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Brett Henry Holko among 17,696 internal medicine physician records in California
Brett Henry Holko, D.O. 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
- Graduated2002 · median 2004 among the 11,065 with a school on file
- Record last updated2021 · 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).
6 internal medicine physician records list a practice address in Bonita
They are 6 of the 140 NPPES records with a practice address in Bonita, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Bonita → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Isaac Davis, DOBonita, CA 919021487232419
- Clint Hoangquocgia, D.O.Bonita, CA 919021225240518
- Jose Leon, MDBonita, CA 919021962471292
- Rosevelle McMillin, M.D.Bonita, CA 919021750573309
- Donald Sandweiss, M.D.Bonita, CA 919021790078921
- Joyce Kellawon, MDAlpine, CA 919011780795476
- Robert Klemens, M.D.Alpine, CA 919011912244856
- Dana Ryan, DR.Alpine, CA 919011780609990
Common questions
What is Brett Henry Holko, D.O.'s NPI number?
Brett Henry Holko, D.O.'s National Provider Identifier (NPI) is 1740398213, issued on Aug 26, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Brett Henry Holko, D.O. located?
The NPPES record lists a practice address at 3955 Bonita RD, Bonita, CA, 91902. Phone: (800) 290-5000. Providers update this record themselves, so call before visiting.
How can I verify Brett Henry Holko, D.O.'s license?
NPPES lists California license number 20A8540, 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 Brett Henry Holko, D.O. prescribe under Medicare Part D?
In 2024, Brett Henry Holko, D.O. had 6,341 Medicare Part D claims for 1,187 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
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.