Dr. Michael Ma, MD
- Medicare patients, 2024
- 12
- Part D claims, 2024
- 1,987
- Publications
- 1
- Hospital affiliations
- 1
- Medical group
- 1
- Practice address
- 9961 Sierra Ave, Fontana, CA 92335
- Practice phone
- Call (909) 427-5000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Ma's professional email, personal email and mobile number
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Dr. Michael Ma is an internist in Fontana, California
Dr. Ma practices at Fontana Medical Center in Fontana, California, part of Kaiser Permanente.
Dr. Ma's NPI, 1891945804, was assigned on September 26, 2008. Dr. Ma graduated from St. George's University School of Medicine in 2006. Dr. Ma holds California license A107326.
- NPI
- 1891945804NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4880729847
- NPI enumeration date
- September 26, 2008
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (909) 427-5000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 46
- Medical school graduation
- 2006
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Michael Ma practices at Fontana Medical Center in Fontana, California
Dr. Ma's primary practice is Fontana Medical Center, at 9961 Sierra Ave, Fontana, CA 92335 in San Bernardino County. The practice phone is (909) 427-5000.
- Fontana Medical Center9961 Sierra Ave, Fontana, CA 92335 · San Bernardino CountyPhone(909) 427-5000
Source: Dmand AI Affiliation Data
Dr. Michael Ma is affiliated with 1 site of care and 1 medical group
Dr. Ma's primary practice is Fontana Medical Center in Fontana, California, part of Kaiser Permanente. The medical group on file is Southern California Permanente Medical Group.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Michael Ma's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Ma practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Fontana Medical Center | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Michael Ma is one of 16,751 internists in California
Internal medicine is Dr. Ma's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Ma is board certified in hospice and palliative medicine by the American Board of Internal Medicine. Dr. Ma is licensed in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Internists near Dr. Ma
Counts of internists 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. Michael Ma treated 12 Medicare patients in 2024, average age 58
CMS counts 12 Medicare patients who saw Dr. Ma in 2024. The largest group is 75 to 84, with 0 patients. Their average risk score is 3.29, 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 73, with 60% women.
Dr. Ma's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
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 73
Patient panel by sex, all payers
- Women60%
- Men40%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Michael Ma wrote 1,987 Medicare Part D claims in 2024
In 2024, Dr. Ma wrote 1,987 Medicare Part D claims for 305 patients. 91% of them were for generic drugs. CMS names the drug for 1,578 of them, across 45 drugs with 11 or more claims each, at $117,382 in total drug cost. In 2023, CMS named 1,214 claims across 38 drugs.
Dr. Ma's Part D claims by kind of drug, 2024
- Generic1,818 claims91%
- Brand-name and other169 claims9%
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
- Opioids32%628 of 1,987 claims
- Antibiotics5%90 of 1,987 claims
- Antipsychotics, patients 65 and over2%37 of 1,987 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: 1,2142024: 1,57830%
Drugs named by CMS: 45 in 2024, 38 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. Michael Ma offers telehealth to Medicare patients
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
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Michael Ma has 1 publication on record
Dmand AI links 1 paper to Dr. Ma in 2019.
Recent publications by Dr. Ma
See who Dr. Ma researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Ma works with, so you can find a warm path to the right internists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Michael Ma has 1 award and honors on record
Dmand AI lists 1 award for Dr. Ma, most recently CMS Stage 1 2012 in 2011.
Awards and honors for Dr. Ma
- 2011
- CMS Stage 1 2012
Source: Dmand AI Professional Profile Data
Dr. Michael Ma graduated from St. George's University School of Medicine
Dr. Ma graduated from St. George's University School of Medicine in 2006.
- Medical school
- Board certified in hospice and palliative medicine
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Michael Ma accepts plans from 2 insurance carriers
Dr. Ma is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
- Kaiser Permanente
- CMS Medicare
Plan types Dr. Ma accepts, by number of carriers
- EPO1
- HMO1
- Medicare1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Michael 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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| 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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network 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. Michael 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. Michael Ma's NPI number?
Dr. Michael Ma's NPI number is 1891945804. It was assigned on September 26, 2008, and it is active in the NPI Registry.
What kind of doctor is Dr. Michael Ma?
Dr. Michael Ma is an internist in Fontana, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Michael Ma practice?
Dr. Ma practices at 9961 Sierra Ave, Fontana, CA 92335. Dr. Ma's primary practice is Fontana Medical Center in Fontana, California, part of Kaiser Permanente.
What is Dr. Michael Ma's office phone number?
The practice phone on file for Dr. Ma is (909) 427-5000.
What is Dr. Michael Ma's medical license number?
Dr. Ma holds California license A107326.
Which hospitals is Dr. Michael Ma affiliated with?
Dr. Ma practices at Fontana Medical Center in Fontana, California.
What medical group is Dr. Michael Ma part of?
Dr. Ma is linked to Southern California Permanente Medical Group.
Does Dr. Michael Ma accept Medicare?
Yes. CMS lists Dr. Ma as accepting Medicare assignment.
Does Dr. Michael Ma offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Ma as offering telehealth services.
How many Medicare patients does Dr. Michael Ma see?
CMS counts 12 Medicare patients who saw Dr. Ma in 2024, with an average age of 58.
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Is Dr. Michael Ma board certified?
Yes. Dr. Ma is board certified in hospice and palliative medicine by the American Board of Internal Medicine.
Where did Dr. Michael Ma go to medical school?
Dr. Ma graduated from St. George's University School of Medicine in 2006.
What drugs does Dr. Michael Ma prescribe most?
In 2024 Medicare Part D data, Dr. Ma's most prescribed drugs by claims were Hydrocodone-Acetaminophen, Oxycodone-Acetaminophen and Morphine Sulfate ER.
How long has Dr. Michael Ma been practicing?
Dr. Ma graduated from medical school in 2006, 20 years ago.
Does Dr. Michael Ma do research?
Dmand AI links 1 publication to Dr. Ma.
What insurance does Dr. Michael Ma accept?
Dr. Ma is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
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