Karl Tscha-Ning Sun, MD
Cardiovascular Disease Physician · La Mesa, CA
Karl Tscha-Ning Sun, MD is a cardiovascular disease physician with a practice address in La Mesa, California, and NPI 1235131061, issued on Aug 11, 2005. Check the license (California A68612, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Karl Tscha-Ning Sun
- Credential
- MD
- Primary taxonomy
- Cardiovascular Disease Physician 207RC0000X
- License number
- A68612 CA
Self-reported in NPPES; status is on the state search - Practice location
- 8851 Center Dr, La Mesa, CA 91942
- Phone
- (619) 668-1550
- Enumerated
- Aug 11, 2005
- Record last updated
- Apr 23, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (619) 668-1554
- Medicaid ID
- 00A686120 CA
- Medicare enrollment
- Enrolled (PECOS I20100831000764); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest cardiovascular disease physician records → All 2,574 in California → Look up another NPI →
Also registered at 8851 Center Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Chun Chow, NPFamily Nurse Practitioner1639589591
- Lauri Combs, LCSWClinical Social Worker1538398979
Verify Karl Tscha-Ning Sun in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A68612Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
35% fewer Medicare Part D claims than the average cardiovascular disease physician in 2024
2,009 Medicare Part D claims for 200 beneficiaries, against an average of 3,078 among the 20,728 providers of this specialty who prescribed in Part D.
Most prescribed
- Amlodipine Besylate183 claims
- Eliquis123 claims
- Losartan Potassium107 claims
- Metoprolol Succinate98 claims
- Diltiazem 24hr Er (Cd)94 claims
- Carvedilol81 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 practice group's MIPS final score for 2023 (Medicare payment program): 100 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. 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, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $451.10
26 payments; by number, the most common kind was food and beverage; the largest payer was Novartis Pharmaceuticals Corporation. The 16,686 providers of this specialty with any payment received $3,819.56 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 one group practice
- Emergency And Acute Care Medical CorporationLa Mesa, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Karl Tscha-Ning Sun among 2,574 cardiovascular disease physician records in California
Karl Tscha-Ning Sun, MD is one of 2,574 cardiovascular disease physician records with a practice address in California. 83% 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, 90% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated1982 · median 1999 among the 1,742 with a school on file
- Record last updated2010 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RC0000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Cardiovascular Disease Physician providers in California
There are 2,574 cardiovascular disease physician records in California.
All 2,574 in California → Every provider in La Mesa → Cardiovascular Disease Physician nationwide →
The 8 cardiovascular disease physician records with the nearest ZIP codes
- Nassir Azimi, M.D.La Mesa, CA 919421366438764
- Anoushiravan Boghairi, MDLa Mesa, CA 919421255549184
- William Davis, M.D.La Mesa, CA 919421316939978
- Hassan Kafri, M.D.La Mesa, CA 919421730258401
- Purushotham Kotha, MDLa Mesa, CA 919421093730814
- Michael Michalski, MDLa Mesa, CA 919421104884790
- Bryant Nguyen, MDLa Mesa, CA 919421902085426
- Reddiwandla Reddy, M.D.La Mesa, CA 919421710996384
Common questions
What is Karl Tscha-Ning Sun, MD's NPI number?
Karl Tscha-Ning Sun, MD's National Provider Identifier (NPI) is 1235131061, issued on Aug 11, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Karl Tscha-Ning Sun, MD located?
The NPPES record lists a practice address at 8851 Center Dr, La Mesa, CA, 91942. Phone: (619) 668-1550. Providers update this record themselves, so call before visiting.
How can I verify Karl Tscha-Ning Sun, MD's license?
NPPES lists California license number A68612, 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 Karl Tscha-Ning Sun, MD prescribe under Medicare Part D?
In 2024, Karl Tscha-Ning Sun, MD had 2,009 Medicare Part D claims for 200 beneficiaries; the average among cardiovascular disease physician prescribers was 3,078. Part D covers Medicare prescriptions only.
What is Karl Tscha-Ning Sun, MD's MIPS final score?
The 2023 MIPS final score is 100 of 100, reported for the practice group. 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.