Dr. James Allen Stewart, MD
- Medicare services, 2024
- 66
- Medicare patients, 2024
- 166
- Hospital affiliations
- 1
- Industry payments
- $251
- Medical groups
- 2
- Practice address
- 815 Pollard Rd, Los Gatos, CA 95032
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Cancer Center Los Gatos - HOPD
Acute Care Hospital outpatient department · Los Gatos, California
Find Dr. Stewart's professional email, personal email and mobile number
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Dr. James Allen Stewart is an anesthesiologist in Los Gatos, California
Dr. Stewart practices at Cancer Center Los Gatos - HOPD in Los Gatos, California.
Dr. Stewart's NPI, 1568448256, was assigned on December 15, 2005. Dr. Stewart graduated from University of Illinois College of Medicine - Chicago in 1989. Dr. Stewart holds California license G159600.
- NPI
- 1568448256NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8628057155
- NPI enumeration date
- December 15, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 63
- Medical school graduation
- 1989
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. James Allen Stewart practices at Cancer Center Los Gatos - HOPD in Los Gatos, California
Dr. Stewart's primary practice is Cancer Center Los Gatos - HOPD, at 815 Pollard Rd, Los Gatos, CA 95032.
- Cancer Center Los Gatos - HOPD815 Pollard Rd, Los Gatos, CA 95032
Source: Dmand AI Affiliation Data
Dr. James Allen Stewart is affiliated with 2 sites of care and 2 medical groups
Dr. Stewart's primary practice is Cancer Center Los Gatos - HOPD in Los Gatos, California. Dr. Stewart is also affiliated with El Camino Health - Mountain View Hospital. The medical group on file is El Camino Health. Dmand AI also links Dr. Stewart to 1 more medical group, named with a free account.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. James Allen Stewart's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Stewart practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Cancer Center Los Gatos - HOPD | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. James Allen Stewart is one of 6,593 anesthesiologists in California
Anesthesiology is Dr. Stewart's primary specialty in the NPI Registry, under taxonomy code 207L00000X. Dr. Stewart is board certified in anesthesiology by the American Board of Anesthesiology. Dmand AI has Dr. Stewart's licenses on file in 3 states: California, Iowa and Illinois.
Specialties and state licenses
- Anesthesiology, CaliforniaPrimary
- Iowa license
- Illinois license
Anesthesiologists near Dr. Stewart
Counts of anesthesiologists 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. James Allen Stewart billed Medicare for 66 services in 2024
CMS data shows 66 Medicare services from Dr. Stewart across 5 procedure codes in 2024, for 166 Medicare patients. Medicare paid $12,380 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Stewart's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Anesthesia
- 2023: 282024: 66136%
Dr. Stewart compared with the California median for anesthesiologists, 2024
- Dr. Stewart
- California median
- Medicare services
- 66vs 728% below
- Medicare patients
- 166vs 14316% above
Medians across 5,562 anesthesiologists in California with Dmand AI profiles that report each measure.
Dr. Stewart'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. Stewart?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Stewart and other anesthesiologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. James Allen Stewart treated 166 Medicare patients in 2024, average age 75
CMS counts 166 Medicare patients who saw Dr. Stewart in 2024. The largest group is 75 to 84, with 72 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 18% are also on Medicaid. Their average risk score is 1.94, 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. Stewart's median patient age at 71, with 50% women.
Dr. Stewart's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Stewart's Medicare patients by sex, 2024
- Women7545%
- Men9155%
Chronic conditions among Dr. Stewart's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis52%
- Diabetes36%
- Ischemic heart disease36%
- Chronic kidney disease35%
- Cancer29%
- Heart failure22%
Share of Medicare patients with each condition. A patient can have several.
Dr. Stewart's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 71
Patient panel by sex, all payers
- Women50%
- Men49%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
How Dr. James Allen Stewart takes part in Medicare
Dr. Stewart 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. James Allen Stewart received $251 in industry payments from 2016 to 2024
CMS Open Payments shows 9 general payments to Dr. Stewart from 7 drug and device companies from 2016 to 2024. Food and beverage make up the largest share, 100% of the total. UCB, Inc. paid the most, $85.
General payments to Dr. Stewart by program year, 2016 to 2024
Companies that paid Dr. Stewart the most, 2016 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. James Allen Stewart graduated from University of Illinois College of Medicine - Chicago
Dr. Stewart graduated from University of Illinois College of Medicine - Chicago in 1989. Dr. Stewart is a member of ASA and Iowa Medical Society.
- Medical school
- Board certified in anesthesiology
Source: Dmand AI Professional Profile Data
Dr. James Allen Stewart accepts plans from 1 insurance carrier
Dr. Stewart is in network with 1 carrier, including CMS Medicare. Medicare plans come from the most carriers, 1. Check the plan with the practice before a visit.
- CMS Medicare
Source: Dmand AI Insurance Network Data
Sources for Dr. James Allen Stewart'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 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) |
| 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 |
| 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. James Allen Stewart
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. James Allen Stewart's NPI number?
Dr. James Allen Stewart's NPI number is 1568448256. It was assigned on December 15, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. James Allen Stewart?
Dr. James Allen Stewart is an anesthesiologist in Los Gatos, California. The primary specialty in the NPI Registry is Anesthesiology Physician (taxonomy code 207L00000X).
Where does Dr. James Allen Stewart practice?
Dr. Stewart practices at 815 Pollard Rd, Los Gatos, CA 95032. Dr. Stewart's primary practice is Cancer Center Los Gatos - HOPD in Los Gatos, California. Dmand AI also links Dr. Stewart to 1 medical group.
What is Dr. James Allen Stewart's medical license number?
Dr. Stewart holds California license G159600, one of the licenses on file in 3 states.
Which states has Dr. James Allen Stewart been licensed in?
Dmand AI has state licenses on file for Dr. Stewart in California (2020 to 2026), Iowa (1995 to 2025) and Illinois (1991 to 1996).
Which hospitals is Dr. James Allen Stewart affiliated with?
Dr. Stewart is affiliated with El Camino Health - Mountain View Hospital.
What medical group is Dr. James Allen Stewart part of?
Dr. Stewart is linked to El Camino Health. Dmand AI links Dr. Stewart to 1 more medical group.
Does Dr. James Allen Stewart accept Medicare?
Yes. CMS data shows Dr. Stewart billed Medicare for 66 services in 2024, and Dr. Stewart accepts Medicare assignment.
How many Medicare patients does Dr. James Allen Stewart see?
CMS counts 166 Medicare patients who saw Dr. Stewart in 2024, with an average age of 75.
Is Dr. James Allen Stewart board certified?
Yes. Dr. Stewart is board certified in anesthesiology by the American Board of Anesthesiology.
Show 5 more questionsShow fewer questions
What services does Dr. James Allen Stewart bill to Medicare?
In 2024, Dr. Stewart's most billed Medicare services were anesthesia (01844), anesthesia (00910) and anesthesia (00811).
Where did Dr. James Allen Stewart go to medical school?
Dr. Stewart graduated from University of Illinois College of Medicine - Chicago in 1989.
Has Dr. James Allen Stewart received payments from drug or device companies?
CMS Open Payments shows $251 in general payments to Dr. Stewart from 7 companies from 2016 to 2024. The largest total came from UCB, Inc.
How long has Dr. James Allen Stewart been practicing?
Dr. Stewart graduated from medical school in 1989, 37 years ago.
What insurance does Dr. James Allen Stewart accept?
Dr. Stewart is in network with 1 carrier, including CMS Medicare. Medicare plans come from the most carriers, 1. Check the plan with the practice before a visit.
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