Michael Ginn Griesinger, M.D.
Emergency Medicine Physician · San Diego, CA
Michael Ginn Griesinger, M.D. is an emergency medicine physician with a practice address in San Diego, California, and NPI 1336556604, issued on Jul 17, 2014. Check the license (California A155029, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Michael Ginn Griesinger
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- A155029 CA
Self-reported in NPPES; status is on the state search - Practice location
- 9455 Clairemont Mesa Blvd, San Diego, CA 92123
- Phone
- (858) 266-5000
- Enumerated
- Jul 17, 2014
- Record last updated
- Nov 22, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20190131002129); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 9455 Clairemont Mesa Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Aurie-Ann AnchoCertified Respiratory Therapist1033698667
Verify Michael Ginn Griesinger in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A155029Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
13% more Medicare Part D claims than the average emergency medicine physician in 2024
256 Medicare Part D claims for 186 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 29 claims were for opioids.
Most prescribed
- Cefpodoxime Proxetil30 claims
- Hydrocodone-Acetaminophen26 claims
- Amoxicillin-Clavulanate Potass20 claims
- Ondansetron Odt16 claims
- Azithromycin13 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).
Bills Medicare through 4 group practices
- Emergency Physicians Associates San Jose PCSan Jose, CA
- Palomar Emergency Physicians, IncEscondido, CA
- Team Physicians OF Northern California Medical Group IncLa Mesa, CA
- Wound Docs ApcLong Beach, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Michael Ginn Griesinger among 7,751 emergency medicine physician records in California
Michael Ginn Griesinger, 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 2014, is newer than 69% of them.
- NPI issued2014 · 69% of these records are older, 28% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2014 · median 2011 among the 4,560 with a school on file
- Record last updated2021 · 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
- Joseph Bellezzo, M.D.San Diego, CA 921231760450340
- William Carter, M.D.San Diego, CA 921231457329062
- Delbert Clark, D.O.San Diego, CA 921231194799593
- Heather Conrad, M.D.San Diego, CA 921231205813409
- Andrew Desjardins, M.D.San Diego, CA 921231396713103
- William Fornaciari, M.D.San Diego, CA 921231083682546
- Lolie Fromm, M.D.San Diego, CA 921231457329096
- Arthur Gruen, M.D.San Diego, CA 921231376511303
Common questions
What is Michael Ginn Griesinger, M.D.'s NPI number?
Michael Ginn Griesinger, M.D.'s National Provider Identifier (NPI) is 1336556604, issued on Jul 17, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Michael Ginn Griesinger, M.D. located?
The NPPES record lists a practice address at 9455 Clairemont Mesa Blvd, San Diego, CA, 92123. Phone: (858) 266-5000. Providers update this record themselves, so call before visiting.
How can I verify Michael Ginn Griesinger, M.D.'s license?
NPPES lists California license number A155029, 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 Michael Ginn Griesinger, M.D. prescribe under Medicare Part D?
In 2024, Michael Ginn Griesinger, M.D. had 256 Medicare Part D claims for 186 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Michael Ginn Griesinger, 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.