Dr. Irvin V. Ma, MD
- Part D claims, 2024
- 22
- Industry payments
- $1,253
- Affiliated sites
- 2
- Medical group
- 1
- State license
- 1
- Practice address
- 795 El Camino Real, Palo Alto, CA 94301
- Practice phone
- Call (650) 324-1832
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Surgery Center Palo Alto
Surgery Center - Medicare-Certified · Palo Alto, 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. Irvin V. Ma is an internist in Palo Alto, California
Dr. Ma practices at Surgery Center Palo Alto in Palo Alto, California.
Dr. Ma's NPI, 1487233201, was assigned on April 7, 2021. Dr. Ma graduated from University of Nevada School of Medicine in 2021. Dr. Ma holds California license A196566.
- NPI
- 1487233201NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6608278825
- NPI enumeration date
- April 7, 2021
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (650) 324-1832
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 31
- Medical school graduation
- 2021
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Irvin V. Ma practices at Surgery Center Palo Alto in Palo Alto, California
Dr. Ma's primary practice is Surgery Center Palo Alto, at 795 El Camino Real, Palo Alto, CA 94301. The practice phone is (650) 324-1832.
- Surgery Center Palo Alto795 El Camino Real, Palo Alto, CA 94301Phone(650) 324-1832
Source: Dmand AI Affiliation Data
Dr. Irvin V. Ma is affiliated with 2 sites of care and 1 medical group
Dr. Ma's primary practice is Surgery Center Palo Alto in Palo Alto, California. The medical group on file is Palo Alto Foundation Medical Group. Dmand AI also links Dr. Ma to 1 more group practice or clinic, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Irvin V. Ma's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Ma practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Surgery Center Palo Alto | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Irvin V. 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 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. Irvin V. Ma's patients have a median age of 43
Across all payers, Dmand AI patient panel data puts Dr. Ma's median patient age at 43, with 59% women.
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 43
Patient panel by sex, all payers
- Women59%
- Men41%
Source: Dmand AI Patient Panel Data
Dr. Irvin V. Ma wrote 22 Medicare Part D claims in 2024
In 2024, Dr. Ma wrote 22 Medicare Part D claims. 95% of them were for generic drugs.
Dr. Ma's Part D claims by kind of drug, 2024
- Generic21 claims95%
- Brand-name and other1 claims5%
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Irvin V. Ma takes part in Medicare
Dr. Ma accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Irvin V. Ma received $1,253 in industry payments in 2025
CMS Open Payments shows 5 general payments to Dr. Ma from 4 drug and device companies in 2025. Food and beverage make up the largest share, 100% of the total. 3-D Matrix, Inc. paid the most, $807.
Companies that paid Dr. Ma the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Irvin V. Ma graduated from University of Nevada School of Medicine
Dr. Ma graduated from University of Nevada School of Medicine in 2021.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Irvin V. 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 Data |
| Part D prescribing | 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) |
| 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. Irvin V. 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. Irvin V. Ma's NPI number?
Dr. Irvin V. Ma's NPI number is 1487233201. It was assigned on April 7, 2021, and it is active in the NPI Registry.
What kind of doctor is Dr. Irvin V. Ma?
Dr. Irvin V. Ma is an internist in Palo Alto, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Irvin V. Ma practice?
Dr. Ma practices at 795 El Camino Real, Palo Alto, CA 94301. Dr. Ma's primary practice is Surgery Center Palo Alto in Palo Alto, California. Dmand AI also links Dr. Ma to 1 group practice or clinic.
What is Dr. Irvin V. Ma's office phone number?
The practice phone on file for Dr. Ma is (650) 324-1832.
What is Dr. Irvin V. Ma's medical license number?
Dr. Ma holds California license A196566.
What medical group is Dr. Irvin V. Ma part of?
Dr. Ma is linked to Palo Alto Foundation Medical Group.
Does Dr. Irvin V. Ma accept Medicare?
Yes. CMS lists Dr. Ma as accepting Medicare assignment.
Where did Dr. Irvin V. Ma go to medical school?
Dr. Ma graduated from University of Nevada School of Medicine in 2021.
Has Dr. Irvin V. Ma received payments from drug or device companies?
CMS Open Payments shows $1,253 in general payments to Dr. Ma from 4 companies from 2025 to 2025. The largest total came from 3-D Matrix, Inc.
How long has Dr. Irvin V. Ma been practicing?
Dr. Ma graduated from medical school in 2021, 5 years ago.
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