Dr. Cesar Koa Ang, MD
- Medicare services, 2024
- 1,734
- Medicare patients, 2024
- 792
- Part D claims, 2024
- 10,185
- Hospital affiliations
- 1
- Industry payments
- $6,022
- Practice address
- 1100 Marshall Way, Placerville, CA 95667
- Practice phone
- Call (530) 622-1441
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Ang's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Cesar Koa Ang is an internist in Placerville, California
Dr. Ang practices at Marshall Medical in Placerville, California, part of Marshall Medical Center.
Dr. Ang's NPI, 1225010218, was assigned on November 16, 2005. Dr. Ang graduated from Far Eastern University Nicanor Reyes Medical Foundation in 1986. Dr. Ang's California license number on file is C50396.
- NPI
- 1225010218NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0446237424
- NPI enumeration date
- November 16, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (530) 622-1441
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 66
- Medical school graduation
- 1986
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Cesar Koa Ang practices at Marshall Medical in Placerville, California
Dr. Ang's primary practice is Marshall Medical, at 1100 Marshall Way, Placerville, CA 95667 in El Dorado County. The practice phone is (530) 622-1441.
- Marshall Medical1100 Marshall Way, Placerville, CA 95667 · El Dorado CountyPhone(530) 622-1441
Source: Dmand AI Affiliation Data
Dr. Cesar Koa Ang is affiliated with 8 sites of care and 1 medical group
Dr. Ang's primary practice is Marshall Medical in Placerville, California, part of Marshall Medical Center. The medical group on file is Marshall Medical Center. Dmand AI also links Dr. Ang to 5 more home health agencies, 1 group practice or clinic and 1 hospice, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Cesar Koa Ang's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Ang practices, 8 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Marshall Medical | Available with a free account |
| +7 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Marshall Medical Center and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Cesar Koa Ang is one of 16,751 internists in California
Internal medicine is Dr. Ang's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dmand AI has Dr. Ang's licenses on file in 5 states: California, Florida, Ohio, Pennsylvania and Iowa.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
- Florida license
- Ohio license
- Pennsylvania license
- Iowa license
Clinical focus
Dmand AI lists acid reflux, acute kidney failure, acute skin infection, adjustment disease, aneurysm, anxiety, arteritis and asthma among the conditions Dr. Ang treats.
Internists near Dr. Ang
Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Cesar Koa Ang billed Medicare for 1,734 services in 2024
CMS data shows 1,734 Medicare services from Dr. Ang across 14 procedure codes in 2024, for 792 Medicare patients. Medicare paid $141,124 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Ang's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1,3252024: 1,3341%
- Other services
- 2023: 3042024: 34313%
- Tests and treatments
- 2023: 632024: 5710%
Dr. Ang compared with the California median for internists, 2024
- Dr. Ang
- California median
- Medicare services
- 1,734vs 3614.8 times
- Medicare patients
- 792vs 1515.2 times
- Part D claims
- 9,350vs 42122.2 times
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Ang's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Ang and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Cesar Koa Ang treated 792 Medicare patients in 2024, average age 76
CMS counts 792 Medicare patients who saw Dr. Ang in 2024. The largest group is 75 to 84, with 289 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 19% are also on Medicaid. Their average risk score is 1.42, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Ang's median patient age at 73, with 51% women.
Dr. Ang's Medicare patients by age, 2024
Dr. Ang's Medicare patients by sex, 2024
- Women38148%
- Men41152%
Chronic conditions among Dr. Ang's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis47%
- Ischemic heart disease32%
- Anxiety29%
- Diabetes28%
- Mood disorders28%
- Atrial fibrillation26%
Share of Medicare patients with each condition. A patient can have several.
Dr. Ang's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 73
Patient panel by sex, all payers
- Women51%
- Men49%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Cesar Koa Ang wrote 10,185 Medicare Part D claims in 2024
In 2024, Dr. Ang wrote 10,185 Medicare Part D claims for 865 patients. 90% of them were for generic drugs. CMS names the drug for 9,350 of them, across 154 drugs with 11 or more claims each, at $577,973 in total drug cost. In 2023, CMS named 7,862 claims across 137 drugs.
Dr. Ang's Part D claims by kind of drug, 2024
- Generic9,120 claims90%
- Brand-name984 claims10%
- Other81 claims1%
Dr. Ang's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Ang's Part D claims, 2024
- Opioids8%814 of 10,185 claims
- Antibiotics3%285 of 10,185 claims
- Antipsychotics, patients 65 and over0%41 of 10,185 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 7,8622024: 9,35019%
Drugs named by CMS: 154 in 2024, 137 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Cesar Koa Ang offers telehealth to Medicare patients
Dr. Ang accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Ang as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Cesar Koa Ang received $6,022 in industry payments from 2016 to 2025
CMS Open Payments shows 315 general payments to Dr. Ang from 40 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. GlaxoSmithKline, LLC. paid the most, $666.
General payments to Dr. Ang by program year, 2016 to 2025
Companies that paid Dr. Ang the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Cesar Koa Ang graduated from Far Eastern University Nicanor Reyes Medical Foundation
Dr. Ang graduated from Far Eastern University Nicanor Reyes Medical Foundation in 1986.
- Medical school
Source: Dmand AI Professional Profile Data
Dr. Cesar Koa Ang accepts plans from 13 insurance carriers
Dr. Ang is in network with 13 carriers, including Blue Cross Blue Shield of Michigan, Elevance and United Healthcare. PPO plans come from the most carriers, 9. Check the plan with the practice before a visit.
- Blue Cross Blue Shield of Michigan
- Elevance
- United Healthcare
- HCSC
- Aetna
- Blue Cross Blue Shield of Massachusetts
- Regence Health Plans
- Alliant Health Plans
- +5 more carriersWith a free account
Plan types Dr. Ang accepts, by number of carriers
- PPO9
- HMO6
- Medicare6
- EPO3
- POS3
Source: Dmand AI Insurance Network Data
Sources for Dr. Cesar Koa Ang's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Cesar Koa Ang
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Cesar Koa Ang's NPI number?
Dr. Cesar Koa Ang's NPI number is 1225010218. It was assigned on November 16, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Cesar Koa Ang?
Dr. Cesar Koa Ang is an internist in Placerville, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Cesar Koa Ang practice?
Dr. Ang practices at 1100 Marshall Way, Placerville, CA 95667. Dr. Ang's primary practice is Marshall Medical in Placerville, California, part of Marshall Medical Center. Dmand AI also links Dr. Ang to 5 home health agencies, 1 group practice or clinic and 1 hospice.
What is Dr. Cesar Koa Ang's office phone number?
The practice phone on file for Dr. Ang is (530) 622-1441.
What is Dr. Cesar Koa Ang's medical license number?
Dr. Ang's California license number on file is C50396, one of the licenses on file in 5 states.
Which states has Dr. Cesar Koa Ang been licensed in?
Dmand AI has state licenses on file for Dr. Ang in California (2000 to 2025), Florida (2000 to 2014), Ohio (1993 to 2005), Pennsylvania (1994 to 2004) and Iowa (1993 to 1996).
Which hospitals is Dr. Cesar Koa Ang affiliated with?
Dr. Ang practices at Marshall Medical in Placerville, California.
What medical group is Dr. Cesar Koa Ang part of?
Dr. Ang is linked to Marshall Medical Center.
Does Dr. Cesar Koa Ang accept Medicare?
Yes. CMS data shows Dr. Ang billed Medicare for 1,734 services in 2024, and Dr. Ang accepts Medicare assignment.
Does Dr. Cesar Koa Ang offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Ang as offering telehealth services.
Show 7 more questionsShow fewer questions
How many Medicare patients does Dr. Cesar Koa Ang see?
CMS counts 792 Medicare patients who saw Dr. Ang in 2024, with an average age of 76.
What services does Dr. Cesar Koa Ang bill to Medicare?
In 2024, Dr. Ang's most billed Medicare services were office visit, established patient (99214), office visit, established patient (99213) and medicare service (G0439).
Where did Dr. Cesar Koa Ang go to medical school?
Dr. Ang graduated from Far Eastern University Nicanor Reyes Medical Foundation in 1986.
What drugs does Dr. Cesar Koa Ang prescribe most?
In 2024 Medicare Part D data, Dr. Ang's most prescribed drugs by claims were Atorvastatin Calcium, Hydrocodone-Acetaminophen and Gabapentin.
Has Dr. Cesar Koa Ang received payments from drug or device companies?
CMS Open Payments shows $6,022 in general payments to Dr. Ang from 40 companies from 2016 to 2025. The largest total came from GlaxoSmithKline, LLC.
How long has Dr. Cesar Koa Ang been practicing?
Dr. Ang graduated from medical school in 1986, 40 years ago.
What insurance does Dr. Cesar Koa Ang accept?
Dr. Ang is in network with 13 carriers, including Blue Cross Blue Shield of Michigan, Elevance and United Healthcare. PPO plans come from the most carriers, 9. Check the plan with the practice before a visit.
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