Yon Kyung Sung, M.D.
Pulmonary Disease Physician · Stanford, CA
Yon Kyung Sung, M.D. is a pulmonary disease physician with a practice address in Stanford, California, and NPI 1477629178, issued on Nov 27, 2006. Check the license (California A99234, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Yon Kyung Sung
- Credential
- M.D.
- Primary taxonomy
- Pulmonary Disease Physician 207RP1001X
- License numbers
- A99234 CA
241178 NY
Self-reported in NPPES; status is on the state search - Practice location
- 300 Pasteur Dr, Stanford, CA 94305
- Phone
- (650) 723-4000
- Enumerated
- Nov 27, 2006
- Record last updated
- Apr 17, 2024
- Medicare enrollment
- Enrolled (PECOS I20100929001305); accepts Medicare assignment
- Medical or professional school
- University Of Pittsburgh School Of Medicine, 2003
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest pulmonary disease physician records → All 1,443 in California → Look up another NPI →
Also registered at 300 Pasteur Dr
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Verify Yon Kyung Sung in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A99234Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
25% fewer Medicare Part D claims than the average pulmonary disease physician in 2024
1,065 Medicare Part D claims for 95 beneficiaries, against an average of 1,425 among the 11,596 providers of this specialty who prescribed in Part D. Brand-name drugs were 52% of claims.
Most prescribed
- Adempas97 claims
- Opsumit85 claims
- Sildenafil Citrate85 claims
- Trelegy Ellipta78 claims
- Ambrisentan70 claims
- Furosemide56 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): 76.5 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).
One hospital affiliation
- Stanford Health CareStanford, CA · Acute Care Hospitals5 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.
Yon Kyung Sung among 1,443 pulmonary disease physician records in California
Yon Kyung Sung, M.D. is one of 1,443 pulmonary disease physician records with a practice address in California. 84% 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 7% of them.
- NPI issued2006 · 7% of these records are older, 51% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated2003 · median 2002 among the 1,061 with a school on file
- Record last updated2024 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RP1001X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
50 pulmonary disease physician records list a practice address in Stanford
They are 50 of the 5,606 NPPES records with a practice address in Stanford, and 1,443 pulmonary disease physician records in California.
All 1,443 in California → Every provider in Stanford → Pulmonary Disease Physician nationwide →
The 8 pulmonary disease physician records with the nearest ZIP codes
- Laveena Chhatwani, MDStanford, CA 943051841278652
- Ramona Doyle, M.D.Stanford, CA 943051497863567
- Jennifer Fresco, M.D.Stanford, CA 943051902979131
- Jonerik Holty, M.D.Stanford, CA 943051720156748
- Deborah Levine, MDStanford, CA 943051831206804
- Joseph Lin, M.D.Stanford, CA 943051720136807
- Gordon Mak, M.D.Stanford, CA 943051447330725
- Paul Mohabir, M.D.Stanford, CA 943051811909708
Common questions
What is Yon Kyung Sung, M.D.'s NPI number?
Yon Kyung Sung, M.D.'s National Provider Identifier (NPI) is 1477629178, issued on Nov 27, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Yon Kyung Sung, M.D. located?
The NPPES record lists a practice address at 300 Pasteur Dr, Stanford, CA, 94305. Phone: (650) 723-4000. Providers update this record themselves, so call before visiting.
How can I verify Yon Kyung Sung, M.D.'s license?
NPPES lists California license number A99234, 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 Yon Kyung Sung, M.D. prescribe under Medicare Part D?
In 2024, Yon Kyung Sung, M.D. had 1,065 Medicare Part D claims for 95 beneficiaries; the average among pulmonary disease physician prescribers was 1,425. Part D covers Medicare prescriptions only.
What is Yon Kyung Sung, M.D.'s MIPS final score?
The 2023 MIPS final score is 76.5 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.