Emily Lydon, MD
Infectious Disease Physician · San Francisco, CA
Emily Lydon, MD is an infectious disease physician with a practice address in San Francisco, California, and NPI 1548720733, issued on Mar 22, 2019. Check the license (California A178381, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Emily Lydon
- Credential
- MD
- Primary taxonomy
- Infectious Disease Physician 207RI0200X
- License number
- A178381 CA
Self-reported in NPPES; status is on the state search - Practice location
- 513 Parnassus Ave RM S380, San Francisco, CA 94143
- Phone
- (415) 476-1000
- Enumerated
- Mar 22, 2019
- Record last updated
- Mar 19, 2026
- Medicare enrollment
- Enrolled (PECOS I20240717001533); accepts Medicare assignment
- Medical or professional school
- Duke University School Of Medicine, 2019
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest infectious disease physician records → All 1,119 in California → Look up another NPI →
Verify Emily Lydon in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A178381Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
91% fewer Medicare Part D claims than the average infectious disease physician in 2024
65 Medicare Part D claims for 13 beneficiaries, against an average of 689 among the 7,388 providers of this specialty who prescribed in Part D. Brand-name drugs were 20% of claims.
Most prescribed
- Methenamine Hippurate12 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.
Bills Medicare through 2 group practices
- Regents OF The University OF CaliforniaSan Francisco, CA
- University OF California San FranciscoSan Francisco, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Emily Lydon among 1,119 infectious disease physician records in California
Emily Lydon, MD is one of 1,119 infectious disease 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 2019, is newer than 92% of them.
- NPI issued2019 · 92% of these records are older, 5% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2019 · median 2003 among the 735 with a school on file
- Record last updated2026 · 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 207RI0200X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Infectious Disease Physician providers in California
There are 1,119 infectious disease physician records in California.
All 1,119 in California → Every provider in San Francisco → Infectious Disease Physician nationwide →
The 8 infectious disease physician records with the nearest ZIP codes
- Cameron Ashbaugh, MDSan Francisco, CA 941431114900537
- Oliver Bacon, M.D.San Francisco, CA 941431497863146
- Huyen Cao, MDSan Francisco, CA 941431700842234
- Peter Chin-Hong, MDSan Francisco, CA 941431215988563
- John Fangman, MDSan Francisco, CA 941431881645737
- Timothy Henrich, M.D.San Francisco, CA 941431902831902
- Vivek Jain, M.D.San Francisco, CA 941431093747248
- Jane Koehler, MDSan Francisco, CA 941431689632747
Common questions
What is Emily Lydon, MD's NPI number?
Emily Lydon, MD's National Provider Identifier (NPI) is 1548720733, issued on Mar 22, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Emily Lydon, MD located?
The NPPES record lists a practice address at 513 Parnassus Ave RM S380, San Francisco, CA, 94143. Phone: (415) 476-1000. Providers update this record themselves, so call before visiting.
How can I verify Emily Lydon, MD's license?
NPPES lists California license number A178381, 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 Emily Lydon, MD prescribe under Medicare Part D?
In 2024, Emily Lydon, MD had 65 Medicare Part D claims for 13 beneficiaries; the average among infectious disease physician prescribers was 689. Part D covers Medicare prescriptions only.
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.