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Dr. Lawrence Ma, MD
- Medicare services, 2024
- 842
- Medicare patients, 2024
- 253
- Part D claims, 2024
- 3,302
- Publications
- 9
- Hospital affiliations
- 1
- Practice address
- 725 Welch Road, Palo Alto, CA 94304
- Practice phone
- Call (650) 497-8000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
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. Lawrence Ma is an internist in Palo Alto, California
Dr. Ma practices at Lucile Packard Children's Hospital Stanford in Palo Alto, California, part of Stanford University.
Dr. Ma's NPI, 1487941696, was assigned on July 8, 2011. Dr. Ma graduated from UC San Diego School of Medicine in 2011. Dr. Ma holds California license A122325.
- NPI
- 1487941696NPI Registry (opens in a new tab)
- NPI enumeration date
- July 8, 2011
- NPI status
- Active
- Practice phone
- (650) 497-8000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 41
- Medical school graduation
- 2011
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Lawrence Ma practices at Lucile Packard Children's Hospital Stanford in Palo Alto, California
Dr. Ma's primary practice is Lucile Packard Children's Hospital Stanford, at 725 Welch Road, Palo Alto, CA 94304 in Santa Clara County. The practice phone is (650) 497-8000.
- Lucile Packard Children's Hospital Stanford725 Welch Road, Palo Alto, CA 94304 · Santa Clara CountyPhone(650) 497-8000
Source: Dmand AI Affiliation Data
Dr. Lawrence Ma is affiliated with 1 site of care and 4 medical groups
Dr. Ma's primary practice is Lucile Packard Children's Hospital Stanford in Palo Alto, California, part of Stanford University. The medical group on file is Stanford Health Care. Dmand AI also links Dr. Ma to 3 more medical groups, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Lawrence 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 |
|---|---|
| Lucile Packard Children's Hospital Stanford | Available with a free account |
| +3 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Lawrence 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 geriatric medicine by the American Board of Internal Medicine. Dr. Ma is licensed in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Clinical focus
Dmand AI lists acid reflux, acute kidney failure, acute skin infection, alzheimer's disease, anxiety, asthma, bursitis and chronic anemia among the conditions Dr. Ma treats.
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. Lawrence Ma billed Medicare for 842 services in 2024
CMS data shows 842 Medicare services from Dr. Ma across 9 procedure codes in 2024, for 253 Medicare patients. Medicare paid $37,528 for them. Every service was in an office.
Dr. Ma's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Other services
- 2023: 1932024: 425120%
- Office and hospital visits
- 2023: 4232024: 33521%
- Tests and treatments
- 2023: 672024: 8222%
Dr. Ma compared with the California median for internists, 2024
- Dr. Ma
- California median
- Medicare services
- 842vs 3612.3 times
- Medicare patients
- 253vs 15168% above
- Part D claims
- 2,526vs 4216.0 times
Medians across 15,815 internists 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 internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Lawrence Ma treated 253 Medicare patients in 2024, average age 73
CMS counts 253 Medicare patients who saw Dr. Ma in 2024. The largest group is 65 to 74, with 98 patients. 69% of them have high cholesterol, and 64% have high blood pressure. 45% are also on Medicaid. Their average risk score is 1.61, 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 60, with 49% women.
Dr. Ma's Medicare patients by age, 2024
Dr. Ma's Medicare patients by sex, 2024
- Women13855%
- Men11545%
Chronic conditions among Dr. Ma's Medicare patients, 2024
- High cholesterol69%
- High blood pressure64%
- Arthritis42%
- Mood disorders29%
- Osteoporosis29%
- Diabetes28%
- Chronic kidney disease27%
- Depression26%
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 60
Patient panel by sex, all payers
- Women49%
- Men49%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Lawrence Ma wrote 3,302 Medicare Part D claims in 2024
In 2024, Dr. Ma wrote 3,302 Medicare Part D claims for 269 patients. 83% of them were for generic drugs. CMS names the drug for 2,526 of them, across 73 drugs with 11 or more claims each, at $342,304 in total drug cost. In 2023, CMS named 2,756 claims across 77 drugs.
Dr. Ma's Part D claims by kind of drug, 2024
- Generic2,752 claims83%
- Brand-name513 claims16%
- Other37 claims1%
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
- Opioids5%166 of 3,302 claims
- Antibiotics1%32 of 3,302 claims
- Antipsychotics, patients 65 and over0%15 of 3,302 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: 2,7562024: 2,5268%
Drugs named by CMS: 73 in 2024, 77 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
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Dr. Lawrence Ma has 9 publications on record
Dmand AI links 9 papers to Dr. Ma, published from 2008 to 2024. 2020 was the busiest year, with 2. Dr. Ma's most frequent co-authors are Helen Chiehyu Wang, MD, Linda M. Boxer, MD and Marilynn Chan, MD.
Dr. Ma's papers by year, 2008 to 2024
Dr. Ma's most frequent co-authors
- Helen Chiehyu Wang, MD2 shared papers
- Linda M. Boxer, MD1 shared paper
- Marilynn Chan, MD1 shared paper
Recent publications by Dr. Ma
Clin Pediatr (Phila)
Ann Allergy Asthma Immunol
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. Lawrence Ma graduated from UC San Diego School of Medicine
Dr. Ma graduated from UC San Diego School of Medicine in 2011.
- Medical school
- Board certified in geriatric medicine
- Board certified in internal medicine
- Board certified in pediatrics
Source: Dmand AI Professional Profile Data
Dr. Lawrence Ma accepts plans from 15 insurance carriers
Dr. Ma is in network with 15 carriers, including Elevance, Aetna and Blue Cross Blue Shield of Michigan. PPO plans come from the most carriers, 10. Check the plan with the practice before a visit.
- Elevance
- Aetna
- Blue Cross Blue Shield of Michigan
- United Healthcare
- HCSC
- Humana
- Blue Cross Blue Shield of Massachusetts
- Molina
- +7 more carriersWith a free account
Plan types Dr. Ma accepts, by number of carriers
- PPO10
- Medicare9
- HMO8
- EPO4
- POS4
Source: Dmand AI Insurance Network Data
Sources for Dr. Lawrence 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 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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| 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. Lawrence 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. Lawrence Ma's NPI number?
Dr. Lawrence Ma's NPI number is 1487941696. It was assigned on July 8, 2011, and it is active in the NPI Registry.
What kind of doctor is Dr. Lawrence Ma?
Dr. Lawrence 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. Lawrence Ma practice?
Dr. Ma practices at 725 Welch Road, Palo Alto, CA 94304. Dr. Ma's primary practice is Lucile Packard Children's Hospital Stanford in Palo Alto, California, part of Stanford University. Dmand AI also links Dr. Ma to 3 medical groups.
What is Dr. Lawrence Ma's office phone number?
The practice phone on file for Dr. Ma is (650) 497-8000.
What is Dr. Lawrence Ma's medical license number?
Dr. Ma holds California license A122325.
Which hospitals is Dr. Lawrence Ma affiliated with?
Dr. Ma practices at Lucile Packard Children's Hospital Stanford in Palo Alto, California.
What medical group is Dr. Lawrence Ma part of?
Dr. Ma is linked to Stanford Health Care. Dmand AI links Dr. Ma to 3 more medical groups.
Does Dr. Lawrence Ma accept Medicare?
Yes. CMS data shows Dr. Ma billed Medicare for 842 services in 2024.
How many Medicare patients does Dr. Lawrence Ma see?
CMS counts 253 Medicare patients who saw Dr. Ma in 2024, with an average age of 73.
Is Dr. Lawrence Ma board certified?
Yes. Dr. Ma is board certified in geriatric medicine by the American Board of Internal Medicine.
Show 7 more questionsShow fewer questions
What services does Dr. Lawrence Ma bill to Medicare?
In 2024, Dr. Ma's most billed Medicare services were office visit, established patient (99214), medicare service (G2211) and medicare service (G0439).
Where did Dr. Lawrence Ma go to medical school?
Dr. Ma graduated from UC San Diego School of Medicine in 2011.
What drugs does Dr. Lawrence Ma prescribe most?
In 2024 Medicare Part D data, Dr. Ma's most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Losartan Potassium.
How long has Dr. Lawrence Ma been practicing?
Dr. Ma graduated from medical school in 2011, 15 years ago.
Does Dr. Lawrence Ma do research?
Dmand AI links 9 publications to Dr. Ma, published from 2008 to 2024.
Who does Dr. Lawrence Ma publish with?
Dr. Ma's most frequent co-authors are Helen Chiehyu Wang, MD (2 shared papers), Linda M. Boxer, MD (1 shared paper) and Marilynn Chan, MD (1 shared paper).
What insurance does Dr. Lawrence Ma accept?
Dr. Ma is in network with 15 carriers, including Elevance, Aetna and Blue Cross Blue Shield of Michigan. PPO plans come from the most carriers, 10. Check the plan with the practice before a visit.
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