Jon Keith Ludwig, M.D.
Emergency Medicine Physician · San Diego, CA
Jon Keith Ludwig, M.D. is an emergency medicine physician with a practice address in San Diego, California, and NPI 1669403911, issued on Jul 5, 2006. Check the license (California A73629, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Jon Keith Ludwig
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- A73629 CA
Self-reported in NPPES; status is on the state search - Practice location
- 4077 Fifth Ave, San Diego, CA 92103
- Phone
- (619) 260-7095
- Enumerated
- Jul 5, 2006
- Record last updated
- Jun 27, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (619) 260-7050
- Medicaid ID
- 00A736290 CA
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 4077 Fifth Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Jon Keith Ludwig in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A73629Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
29% fewer Medicare Part D claims than the average emergency medicine physician in 2024
160 Medicare Part D claims for 120 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims.
Most prescribed
- Amoxicillin-Clavulanate Potass12 claims
- Doxycycline Hyclate12 claims
- Prednisone12 claims
- Albuterol Sulfate Hfa11 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).
Jon Keith Ludwig among 7,751 emergency medicine physician records in California
Jon Keith Ludwig, M.D. is one of 7,751 emergency medicine physician records with a practice address in California. 81% 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 4% of them.
- NPI issued2006 · 4% of these records are older, 60% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 59% of these records are
- Record last updated2008 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Emergency Medicine Physician providers in California
There are 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in San Diego → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Carolyn Barber, MDSan Diego, CA 921031750325502
- Anthony Bielawski, M.D.San Diego, CA 921031528038346
- Colleen Campbell, MDSan Diego, CA 921031669416483
- Richard Childers, M.D.San Diego, CA 921031902876220
- Michelle Daniel, MDSan Diego, CA 921031801879861
- Julian Lis, M.D.San Diego, CA 921031932100062
- Leslie Mukau, MDSan Diego, CA 921031578526026
- Sassan Naderi, M.D.San Diego, CA 921031811987936
Common questions
What is Jon Keith Ludwig, M.D.'s NPI number?
Jon Keith Ludwig, M.D.'s National Provider Identifier (NPI) is 1669403911, issued on Jul 5, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Jon Keith Ludwig, M.D. located?
The NPPES record lists a practice address at 4077 Fifth Ave, San Diego, CA, 92103. Phone: (619) 260-7095. Providers update this record themselves, so call before visiting.
How can I verify Jon Keith Ludwig, M.D.'s license?
NPPES lists California license number A73629, 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 Jon Keith Ludwig, M.D. prescribe under Medicare Part D?
In 2024, Jon Keith Ludwig, M.D. had 160 Medicare Part D claims for 120 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Jon Keith Ludwig, M.D.'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.