Cynthia Shannon Lin, M.D.
Internal Medicine Physician · San Diego, CA
Cynthia Shannon Lin, M.D. is an internal medicine physician with a practice address in San Diego, California, and NPI 1205846763, issued on Aug 8, 2006. Check the license (California A62244, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Cynthia Shannon Lin
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A62244 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2020 Genesee Ave, San Diego, CA 92123
- Phone
- (858) 499-2600
- Enumerated
- Aug 8, 2006
- Record last updated
- Jan 13, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (858) 616-8258
- Medicaid ID
- 00A622440 CA
- Medicare enrollment
- Enrolled (PECOS I20100805000184); accepts Medicare assignment
- Medical or professional school
- Jefferson Medical College Of Thomas Jefferson University, 1995
- 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 2020 Genesee Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Cynthia Shannon Lin in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A62244Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
43% more Medicare Part D claims than the average internal medicine physician in 2024
4,547 Medicare Part D claims for 527 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 73 claims were for opioids.
Most prescribed
- Atorvastatin Calcium458 claims
- Losartan Potassium262 claims
- Amlodipine Besylate166 claims
- Levothyroxine Sodium158 claims
- Rosuvastatin Calcium129 claims
- Gabapentin117 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): 73.6 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).
Bills Medicare through one group practice
- Sharp Rees-Stealy Medical Group IncSan Diego, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Cynthia Shannon Lin among 17,696 internal medicine physician records in California
Cynthia Shannon Lin, M.D. 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 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1995 · median 2004 among the 11,065 with a school on file
- Record last updated2014 · 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).
961 internal medicine physician records list a practice address in San Diego
They are 961 of the 52,937 NPPES records with a practice address in San Diego, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in San Diego → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
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- Faiz Hussain, MDSan Diego, CA 921231962422147
- Bernard Lichtenstein, M.D.San Diego, CA 921231104878073
- Karim Mansour, M.D.San Diego, CA 921231942238878
- Lynne Milgram, M.D.San Diego, CA 921231629016316
Common questions
What is Cynthia Shannon Lin, M.D.'s NPI number?
Cynthia Shannon Lin, M.D.'s National Provider Identifier (NPI) is 1205846763, issued on Aug 8, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Cynthia Shannon Lin, M.D. located?
The NPPES record lists a practice address at 2020 Genesee Ave, San Diego, CA, 92123. Phone: (858) 499-2600. Providers update this record themselves, so call before visiting.
How can I verify Cynthia Shannon Lin, M.D.'s license?
NPPES lists California license number A62244, 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 Cynthia Shannon Lin, M.D. prescribe under Medicare Part D?
In 2024, Cynthia Shannon Lin, M.D. had 4,547 Medicare Part D claims for 527 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Cynthia Shannon Lin, M.D.'s MIPS final score?
The 2023 MIPS final score is 73.6 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.