Michele Lee Ritter, M.D.
Infectious Disease Physician · San Diego, CA
Michele Lee Ritter, M.D. is an infectious disease physician with a practice address in San Diego, California, and NPI 1225262975, issued on May 11, 2009. Check the license (California A112536, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Michele Lee Ritter
- Credential
- M.D.
- Primary taxonomy
- Infectious Disease Physician 207RI0200X
- License number
- A112536 CA
Self-reported in NPPES; status is on the state search - Practice location
- 4168 Front St, San Diego, CA 92103
- Phone
- (619) 543-6146
- Enumerated
- May 11, 2009
- Record last updated
- Jul 16, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (619) 543-7841
- Medicare enrollment
- Enrolled (PECOS I20101013000035); accepts Medicare assignment
- Medical or professional school
- Georgetown University School Of Medicine, 2004
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest infectious disease physician records → All 1,119 in California → Look up another NPI →
Also registered at 4168 Front St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Schafer Boeder, M.D.Endocrinology, Diabetes & Metabolism Physician1477808285
Verify Michele Lee Ritter in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A112536Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
21% fewer Medicare Part D claims than the average infectious disease physician in 2024
543 Medicare Part D claims for 156 beneficiaries, against an average of 689 among the 7,388 providers of this specialty who prescribed in Part D. Brand-name drugs were 3% of claims.
Most prescribed
- Amoxicillin-Clavulanate Potass158 claims
- Doxycycline Monohydrate78 claims
- Amoxicillin35 claims
- Sulfamethoxazole-Trimethoprim33 claims
- Daptomycin21 claims
- Ciprofloxacin Hcl20 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 one group practice
- Regents OF The University OF CaliforniaSan Diego, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Michele Lee Ritter among 1,119 infectious disease physician records in California
Michele Lee Ritter, M.D. 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 2009, is newer than 66% of them.
- NPI issued2009 · 66% of these records are older, 31% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2004 · median 2003 among the 735 with a school on file
- Record last updated2020 · 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 Diego → Infectious Disease Physician nationwide →
The 8 infectious disease physician records with the nearest ZIP codes
- Saima Aslam, M.D.San Diego, CA 921031477565257
- Constance Benson, M.D.San Diego, CA 921031871541664
- Ajay Bharti, MDSan Diego, CA 921031902954910
- Sara Browne, M.DSan Diego, CA 921031275571176
- Joshua Fierer, M.D.San Diego, CA 921031871525584
- Theodoros Katsivas, MDSan Diego, CA 921031679526164
- William Mathews, M.D.San Diego, CA 921031194773259
- Kalpana Natrajan, M.D.San Diego, CA 921031770686834
Common questions
What is Michele Lee Ritter, M.D.'s NPI number?
Michele Lee Ritter, M.D.'s National Provider Identifier (NPI) is 1225262975, issued on May 11, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Michele Lee Ritter, M.D. located?
The NPPES record lists a practice address at 4168 Front St, San Diego, CA, 92103. Phone: (619) 543-6146. Providers update this record themselves, so call before visiting.
How can I verify Michele Lee Ritter, M.D.'s license?
NPPES lists California license number A112536, 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 Michele Lee Ritter, M.D. prescribe under Medicare Part D?
In 2024, Michele Lee Ritter, M.D. had 543 Medicare Part D claims for 156 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.