Dr. Lawrence Ma, MD

  • Palo Alto, CA
  • Internist
NPI1487941696
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
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Personal email
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Mobile number
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Social profiles

Primary practice

Lucile Packard Children's Hospital Stanford

Hospital · Palo Alto, California

See all 5 affiliations

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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 and contact details
NPI enumeration date
July 8, 2011
NPI status
Active
Practice phone
(650) 497-8000
Professional email
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Personal email
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Mobile number
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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.

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.

See all 5 affiliations for Dr. Ma

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.

EHR by site
SiteEHR vendor and product
Lucile Packard Children's Hospital StanfordAvailable with a free account
+3 medical groupsAvailable 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, CaliforniaPrimaryLicense A122325 · 2012 to 2026 · taxonomy 207R00000X

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.

Medicare services, 2024842
Medicare patients253
Paid by Medicare$37,528
Procedure codes9

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.

See all procedures by Dr. Ma

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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Ma and other internists in California.

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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.

Medicare patients, 2024253
Average age73
Average risk score1.61
Also on Medicaid45%

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

  1. High cholesterol69%
  2. High blood pressure64%
  3. Arthritis42%
  4. Mood disorders29%
  5. Osteoporosis29%
  6. Diabetes28%
  7. Chronic kidney disease27%
  8. 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.

Part D claims, 20243,302
Drugs named by CMS73
Total drug cost$342,304
Part D patients269

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.

See all prescribing by Dr. Ma

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.

Papers9
Years published2008 to 2024

Dr. Ma's papers by year, 2008 to 2024

Dr. Ma's most frequent co-authors

Recent publications by Dr. Ma

See all 9 publications and co-authors

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.

How network discovery works

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.

  1. Medical schoolUC San Diego School of Medicine
  2. Board certified in geriatric medicineAmerican Board of Internal Medicine
  3. Board certified in internal medicineAmerican Board of Internal Medicine
  4. Board certified in pediatricsAmerican Board of 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.

Plan types Dr. Ma accepts, by number of carriers

  1. PPO10
  2. Medicare9
  3. HMO8
  4. EPO4
  5. POS4

Source: Dmand AI Insurance Network Data

Sources for Dr. Lawrence Ma's profile data

Sources for the data on this page
Data on this pageSource
NPI, name, sex, specialty and licensesNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data
Practice locations and phoneDmand AI Affiliation Data
Primary practice, affiliations and health systemDmand AI Affiliation DataDmand AI Org Hierarchy Data
Medicare services and procedure codesMedicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab)
State medians for the same specialtyDmand AI Peer Benchmarks
Medicare patients and the all-payer patient panelDmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab)
Part D prescribingMedicare 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-authorsPubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage
Training, board certification and membershipsDmand AI Professional Profile Data
Insurance carriers and plan typesDmand AI Insurance Network Data
EHR at each practice siteDmand AI Technology Install Data
Similar physiciansDmand 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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