Michael Sonbaty, M.D.
Internal Medicine Physician · Chula Vista, CA
Michael Sonbaty, M.D. is an internal medicine physician with a practice address in Chula Vista, California, and NPI 1063544773, issued on Mar 9, 2007. Check the license (California A94543, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Michael Sonbaty
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A94543 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1400 E Palomar St, Chula Vista, CA 91913
- Phone
- (858) 499-2616
- Enumerated
- Mar 9, 2007
- Record last updated
- Aug 24, 2015 (not updated in 11 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20070726000772); accepts Medicare assignment
- Medical or professional school
- Perelman School Of Med At The University Of Pennsylvania, 2004
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 1400 E Palomar St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Michael Sonbaty in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A94543Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
89% fewer Medicare Part D claims than the average internal medicine physician in 2024
363 Medicare Part D claims for 176 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 22 claims were for opioids.
Most prescribed
- Cefuroxime36 claims
- Atorvastatin Calcium24 claims
- Prednisone17 claims
- Doxycycline Hyclate16 claims
- Amoxicillin-Clavulanate Potass11 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 IncChula Vista, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Michael Sonbaty among 17,696 internal medicine physician records in California
Michael Sonbaty, 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 2007, is newer than 44% of them.
- NPI issued2007 · 44% of these records are older, 44% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2004 · median 2004 among the 11,065 with a school on file
- Record last updated2015 · 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).
81 internal medicine physician records list a practice address in Chula Vista
They are 81 of the 5,329 NPPES records with a practice address in Chula Vista, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Chula Vista → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Farschad Birdjandi, M.D.Chula Vista, CA 919131205823929
- Sheri Cameron, MDChula Vista, CA 919131568859411
- William Contreras, M.D.Chula Vista, CA 919131780694273
- Brian Curley, M.DChula Vista, CA 919131700081569
- June Dela Cruz, M.D.Chula Vista, CA 919131689784886
- Edward GreeneChula Vista, CA 919131265401368
- Carlos Jimenez-Grillo, M.D.Chula Vista, CA 919131144267188
- Timothy Lee, M.D.Chula Vista, CA 919131962412403
Common questions
What is Michael Sonbaty, M.D.'s NPI number?
Michael Sonbaty, M.D.'s National Provider Identifier (NPI) is 1063544773, issued on Mar 9, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Michael Sonbaty, M.D. located?
The NPPES record lists a practice address at 1400 E Palomar St, Chula Vista, CA, 91913. Phone: (858) 499-2616. Providers update this record themselves, so call before visiting.
How can I verify Michael Sonbaty, M.D.'s license?
NPPES lists California license number A94543, 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 Sonbaty, M.D. prescribe under Medicare Part D?
In 2024, Michael Sonbaty, M.D. had 363 Medicare Part D claims for 176 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Michael Sonbaty, 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.