Cesar Koa Ang, MD
Internal Medicine Physician · Placerville, CA
Cesar Koa Ang, MD is an internal medicine physician with a practice address in Placerville, California, and NPI 1225010218, issued on Nov 16, 2005. Check the license (California C50396, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Cesar Koa Ang
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- C50396 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1095 Marshall Way, Placerville, CA 95667
- Phone
- (530) 626-2920
- Enumerated
- Nov 16, 2005
- Record last updated
- Dec 18, 2013 (not updated in 13 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20080304000187); accepts 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 1095 Marshall Way
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Samuel Ceridon, M.D.Family Medicine Physician1679800247
Verify Cesar Koa Ang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C50396Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.2 times the Medicare Part D claims of the average internal medicine physician in 2024
10,185 Medicare Part D claims for 865 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. 814 claims were for opioids.
Most prescribed
- Atorvastatin Calcium554 claims
- Hydrocodone-Acetaminophen488 claims
- Gabapentin352 claims
- Amlodipine Besylate346 claims
- Lisinopril326 claims
- Losartan Potassium322 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.
Industry payments in 2024: $536.19
27 payments; by number, the most common kind was food and beverage; the largest payer was GlaxoSmithKline, LLC. 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.
One hospital affiliation
- Marshall Medical CenterPlacerville, CA · Acute Care Hospitals4 of 5 stars
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Cesar Koa Ang among 17,696 internal medicine physician records in California
Cesar Koa Ang, 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 95% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1986 · median 2004 among the 11,065 with a school on file
- Record last updated2013 · 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).
Internal Medicine Physician providers in California
There are 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Placerville → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Ketan Ajudia, M.D.Placerville, CA 956671114934866
- Joe AlfeghalyPlacerville, CA 956671548831027
- Gerardo Galang, MDPlacerville, CA 956671790711034
- Robert Macy, MDPlacerville, CA 956671184630147
- Thanh Trang Nguyen, MDPlacerville, CA 956671497907083
- Mohammed Siddiqi, MDPlacerville, CA 956671003933094
- Zachary Walder, DOPlacerville, CA 956671417585597
- Josefina Aquino, M.D.Rancho Cordova, CA 956701427021229
Common questions
What is Cesar Koa Ang, MD's NPI number?
Cesar Koa Ang, MD's National Provider Identifier (NPI) is 1225010218, issued on Nov 16, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Cesar Koa Ang, MD located?
The NPPES record lists a practice address at 1095 Marshall Way, Placerville, CA, 95667. Phone: (530) 626-2920. Providers update this record themselves, so call before visiting.
How can I verify Cesar Koa Ang, MD's license?
NPPES lists California license number C50396, 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 Cesar Koa Ang, MD prescribe under Medicare Part D?
In 2024, Cesar Koa Ang, MD had 10,185 Medicare Part D claims for 865 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.