Louis Chao-I Ho, D.O.
Family Medicine Physician · Monrovia, CA
Louis Chao-I Ho, D.O. is a family medicine physician with a practice address in Monrovia, California, and NPI 1629375431, issued on Feb 15, 2011. Check the license (California 20A11585, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Louis Chao-I Ho
- Credential
- D.O.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 20A11585 CA
Self-reported in NPPES; status is on the state search - Practice location
- 513 E Lime Ave, Monrovia, CA 91016
- Phone
- (626) 445-1000
- Enumerated
- Feb 15, 2011
- Record last updated
- Aug 29, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (626) 513-8750
- Medicare enrollment
- Enrolled (PECOS I20150422001624); accepts Medicare assignment
- Medical or professional school
- Lake Erie College Of Osteopathic Medicine, Erie, 2009
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 513 E Lime Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Dianna MartinezRehabilitation Practitioner1568595445
- Juan PabonCase Manager/Care Coordinator1164855540
- James WelchCase Manager/Care Coordinator1891048955
Verify Louis Chao-I Ho in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A11585Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
58% fewer Medicare Part D claims than the average family medicine physician in 2024
1,488 Medicare Part D claims for 99 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D.
Most prescribed
- Losartan Potassium132 claims
- Atorvastatin Calcium128 claims
- Amlodipine Besylate95 claims
- Metformin Hcl75 claims
- Baclofen46 claims
- Januvia37 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.
Louis Chao-I Ho among 17,133 family medicine physician records in California
Louis Chao-I Ho, D.O. is one of 17,133 family medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 63% of them.
- NPI issued2011 · 63% of these records are older, 34% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2009 · median 2005 among the 10,652 with a school on file
- Record last updated2018 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Family Medicine Physician providers in California
There are 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Monrovia → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Donald Balacuit, DOMonrovia, CA 910161598737116
- Lorraine Cheng, MDMonrovia, CA 910161912199696
- Gerardo Guba, MDMonrovia, CA 910161164402632
- Daisha Ortega, MDMonrovia, CA 910161356905954
- Reena Patel, M.D.Monrovia, CA 910161194958256
- Zaw Ye, MDMonrovia, CA 910161144886599
- Arbi Ghazarian, M.D.Montrose, CA 910201992773253
- Steven Kamajian, D.OMontrose, CA 910201295703320
Common questions
What is Louis Chao-I Ho, D.O.'s NPI number?
Louis Chao-I Ho, D.O.'s National Provider Identifier (NPI) is 1629375431, issued on Feb 15, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Louis Chao-I Ho, D.O. located?
The NPPES record lists a practice address at 513 E Lime Ave, Monrovia, CA, 91016. Phone: (626) 445-1000. Providers update this record themselves, so call before visiting.
How can I verify Louis Chao-I Ho, D.O.'s license?
NPPES lists California license number 20A11585, 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 Louis Chao-I Ho, D.O. prescribe under Medicare Part D?
In 2024, Louis Chao-I Ho, D.O. had 1,488 Medicare Part D claims for 99 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.