Dr. Andrew Ma, MD
- Medicare services, 2024
- 51,305
- Medicare patients, 2024
- 535
- Part D claims, 2024
- 505
- MIPS score, 2024
- 75
- Hospital affiliations
- 2
- Practice address
- 375 E Rolling Oaks Dr, Thousand Oaks, CA 91361
- Practice phone
- Call (805) 777-8956
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Thousand Oaks Surgical Institute, A.M.C
Thousand Oaks, California
Find Dr. Ma's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Andrew Ma is an infectious disease specialist in Thousand Oaks, California
Dr. Ma practices at Thousand Oaks Surgical Institute, A.M.C in Thousand Oaks, California.
Dr. Ma's NPI, 1528299708, was assigned on August 5, 2009. Dr. Ma graduated from Tufts University School of Medicine in 2009. Dr. Ma holds California license A115952.
- NPI
- 1528299708NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7517288178
- NPI enumeration date
- August 5, 2009
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (805) 777-8956
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 43
- Medical school graduation
- 2009
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Andrew Ma practices at Thousand Oaks Surgical Institute, A.M.C in Thousand Oaks, California
Dr. Ma's primary practice is Thousand Oaks Surgical Institute, A.M.C, at 375 E Rolling Oaks Dr, Thousand Oaks, CA 91361 in Ventura County. The practice phone is (805) 777-8956.
- Thousand Oaks Surgical Institute, A.M.C375 E Rolling Oaks Dr, Thousand Oaks, CA 91361 · Ventura CountyPhone(805) 777-8956
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Andrew Ma is affiliated with 4 sites of care and 2 medical groups
Dr. Ma's primary practice is Thousand Oaks Surgical Institute, A.M.C in Thousand Oaks, California. Dr. Ma is also affiliated with Los Robles Regional Medical Center. The medical group on file is Mazur Statner And Dutta Medical Group. Dmand AI also links Dr. Ma to 1 more hospital, 1 group practice or clinic and 1 medical group, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Andrew Ma's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Ma practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Thousand Oaks Surgical Institute, A.M.C | Available with a free account |
| +3 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Andrew Ma is one of 1,054 infectious disease specialists in California
Infectious disease is Dr. Ma's primary specialty in the NPI Registry, under taxonomy code 207RI0200X. Dr. Ma is licensed in California.
Specialties and state licenses
- Infectious disease, CaliforniaPrimary
Infectious disease specialists near Dr. Ma
Counts of infectious disease specialists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Andrew Ma billed Medicare for 51,305 services in 2024
CMS data shows 51,305 Medicare services from Dr. Ma across 11 procedure codes in 2024, for 535 Medicare patients. Medicare paid $202,039 for them.
Dr. Ma's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Drugs given in the office
- 2023: 02024: 48,978
- Office and hospital visits
- 2023: 2,0682024: 2,0541%
- Tests and treatments
- 2023: 402024: 257543%
- Surgery
- 2023: 02024: 16
Where Dr. Ma's Medicare services took place, 2024
- In an office49,44596%
- In a facility1,8604%
Dr. Ma compared with the California median for infectious disease specialists, 2024
- Dr. Ma
- California median
- Medicare services
- 51,305vs 429119.6 times
- Medicare patients
- 535vs 1803.0 times
- Part D claims
- 347vs 1192.9 times
Medians across 930 infectious disease specialists in California with Dmand AI profiles that report each measure.
Dr. Ma's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Ma?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Ma and other infectious disease specialists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Andrew Ma treated 535 Medicare patients in 2024, average age 78
CMS counts 535 Medicare patients who saw Dr. Ma in 2024. The largest group is 75 to 84, with 212 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 18% are also on Medicaid. Their average risk score is 2.54, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Ma's median patient age at 69, with 51% women.
Dr. Ma's Medicare patients by age, 2024
Dr. Ma's Medicare patients by sex, 2024
- Women28954%
- Men24646%
Chronic conditions among Dr. Ma's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis65%
- Ischemic heart disease50%
- Diabetes46%
- Chronic kidney disease44%
- Heart failure44%
- Mood disorders44%
Share of Medicare patients with each condition. A patient can have several.
Dr. Ma's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 69
Patient panel by sex, all payers
- Women51%
- Men48%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Andrew Ma wrote 505 Medicare Part D claims in 2024
In 2024, Dr. Ma wrote 505 Medicare Part D claims for 96 patients. 83% of them were for generic drugs. CMS names the drug for 347 of them, across 18 drugs with 11 or more claims each, at $184,884 in total drug cost. In 2023, CMS named 314 claims across 16 drugs.
Dr. Ma's Part D claims by kind of drug, 2024
- Generic421 claims83%
- Brand-name84 claims17%
Dr. Ma's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Ma's Part D claims, 2024
- Antibiotics51%259 of 505 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 3142024: 34711%
Drugs named by CMS: 18 in 2024, 16 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Andrew Ma scored 75 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 75 out of 100 for Dr. Ma for performance year 2024, reported individually. Dr. Ma accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Ma as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- MIPS final score, 2024
- 75 of 100
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Andrew Ma received $3,043 in industry payments from 2016 to 2025
CMS Open Payments shows 74 general payments to Dr. Ma from 23 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 99% of the total. Merck Sharp & Dohme Corporation paid the most, $693.
General payments to Dr. Ma by program year, 2016 to 2025
General payments to Dr. Ma by kind, 2016 to 2025
- Food and beverage$2,99899%
- Education$451%
Companies that paid Dr. Ma the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Andrew Ma graduated from Tufts University School of Medicine
Dr. Ma graduated from Tufts University School of Medicine in 2009.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Andrew Ma's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Andrew Ma
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Andrew Ma's NPI number?
Dr. Andrew Ma's NPI number is 1528299708. It was assigned on August 5, 2009, and it is active in the NPI Registry.
What kind of doctor is Dr. Andrew Ma?
Dr. Andrew Ma is an infectious disease specialist in Thousand Oaks, California. The primary specialty in the NPI Registry is Infectious Disease Physician (taxonomy code 207RI0200X).
Where does Dr. Andrew Ma practice?
Dr. Ma practices at 375 E Rolling Oaks Dr, Thousand Oaks, CA 91361. Dr. Ma's primary practice is Thousand Oaks Surgical Institute, A.M.C in Thousand Oaks, California. Dmand AI also links Dr. Ma to 1 hospital, 1 group practice or clinic and 1 medical group.
What is Dr. Andrew Ma's office phone number?
The practice phone on file for Dr. Ma is (805) 777-8956.
What is Dr. Andrew Ma's medical license number?
Dr. Ma holds California license A115952.
Which hospitals is Dr. Andrew Ma affiliated with?
Dr. Ma is affiliated with Los Robles Regional Medical Center. Dmand AI links Dr. Ma to 1 more hospital.
What medical group is Dr. Andrew Ma part of?
Dr. Ma is linked to Mazur Statner And Dutta Medical Group. Dmand AI links Dr. Ma to 1 more medical group.
Does Dr. Andrew Ma accept Medicare?
Yes. CMS data shows Dr. Ma billed Medicare for 51,305 services in 2024, and Dr. Ma accepts Medicare assignment.
Does Dr. Andrew Ma offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Ma as offering telehealth services.
What is Dr. Andrew Ma's MIPS score?
Dr. Ma's MIPS final score for performance year 2024 is 75 out of 100, reported individually.
Show 6 more questionsShow fewer questions
How many Medicare patients does Dr. Andrew Ma see?
CMS counts 535 Medicare patients who saw Dr. Ma in 2024, with an average age of 78.
What services does Dr. Andrew Ma bill to Medicare?
In 2024, Dr. Ma's most billed Medicare services were injected or infused drug (J0878), hospital inpatient care (99232) and hospital inpatient care (99233).
Where did Dr. Andrew Ma go to medical school?
Dr. Ma graduated from Tufts University School of Medicine in 2009.
What drugs does Dr. Andrew Ma prescribe most?
In 2024 Medicare Part D data, Dr. Ma's most prescribed drugs by claims were Azithromycin, Ceftriaxone and Ertapenem.
Has Dr. Andrew Ma received payments from drug or device companies?
CMS Open Payments shows $3,043 in general payments to Dr. Ma from 23 companies from 2016 to 2025. The largest total came from Merck Sharp & Dohme Corporation.
How long has Dr. Andrew Ma been practicing?
Dr. Ma graduated from medical school in 2009, 17 years ago.
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