Andrew Ma, MD
Infectious Disease Physician · Thousand Oaks, CA
Andrew Ma, MD is an infectious disease physician with a practice address in Thousand Oaks, California, and NPI 1528299708, issued on Aug 5, 2009. Check the license (California A115952, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Andrew Ma
- Credential
- MD
- Primary taxonomy
- Infectious Disease Physician 207RI0200X
- License number
- A115952 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2220 Lynn RD Ste 301, Thousand Oaks, CA 91360
- Phone
- (805) 495-1073
- Enumerated
- Aug 5, 2009
- Record last updated
- Oct 2, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (805) 495-5836
- Medicare enrollment
- Enrolled (PECOS I20150608001591); accepts Medicare assignment
- Medical or professional school
- Tufts University School Of Medicine, 2009
- Entity
- Type 1 · individual
8 nearest infectious disease physician records → All 1,119 in California → Look up another NPI →
Verify Andrew Ma in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A115952Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
27% fewer Medicare Part D claims than the average infectious disease physician in 2024
505 Medicare Part D claims for 96 beneficiaries, against an average of 689 among the 7,388 providers of this specialty who prescribed in Part D. Brand-name drugs were 17% of claims.
Most prescribed
- Azithromycin32 claims
- Ceftriaxone32 claims
- Ertapenem31 claims
- Albuterol Sulfate Hfa29 claims
- Ethambutol Hcl25 claims
- Cephalexin23 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): 87.4 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).
Industry payments in 2024: $117.45
2 payments; by number, the most common kind was food and beverage; the largest payer was Shionogi Inc. The 3,895 providers of this specialty with any payment received $4,362.19 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Mark H Mazur MD And Barry Statner MD A Professional CorporationThousand Oaks, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Andrew Ma among 1,119 infectious disease physician records in California
Andrew Ma, 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 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
- Graduated2009 · median 2003 among the 735 with a school on file
- Record last updated2018 · 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 Thousand Oaks → Infectious Disease Physician nationwide →
The 8 infectious disease physician records with the nearest ZIP codes
- Sujay Dutta, MDThousand Oaks, CA 913601184712168
- Mark Mazur, MDThousand Oaks, CA 913601245328228
- Fang-Yu Liu, MDWestlake Village, CA 913611104311216
- Philip McDonald, M.D.Thousand Oaks, CA 913611952644122
- Dharushana Muthulingam, MDWestlake Village, CA 913611447526231
- Ramesh Nathan, MDThousand Oaks, CA 913611215025291
- Joseph Nussbaum, MDWestlake Village, CA 913611922033463
- E Duane Carmalt, M.D.Tarzana, CA 913561952597627
Common questions
What is Andrew Ma, MD's NPI number?
Andrew Ma, MD's National Provider Identifier (NPI) is 1528299708, issued on Aug 5, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Andrew Ma, MD located?
The NPPES record lists a practice address at 2220 Lynn RD Ste 301, Thousand Oaks, CA, 91360. Phone: (805) 495-1073. Providers update this record themselves, so call before visiting.
How can I verify Andrew Ma, MD's license?
NPPES lists California license number A115952, 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 Andrew Ma, MD prescribe under Medicare Part D?
In 2024, Andrew Ma, MD had 505 Medicare Part D claims for 96 beneficiaries; the average among infectious disease physician prescribers was 689. Part D covers Medicare prescriptions only.
What is Andrew Ma, MD's MIPS final score?
The 2023 MIPS final score is 87.4 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.