William W. Tan
- Medicare services, 2024
- 32
- Medicare patients, 2024
- 124
- Hospital affiliations
- 3
- Industry payments
- $226
- Medical groups
- 2
- Practice address
- 4101 Torrance Blvd, Torrance, CA 90503
- Practice phone
- Call (310) 540-7676
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find William Tan'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.
William W. Tan is an anesthesiologist in Torrance, California
William Tan practices at Providence Little Company of Mary Medical Center Torrance in Torrance, California, part of Providence Health & Services.
William Tan's NPI, 1609379387, was assigned on March 8, 2018. William Tan graduated from University Of Cincinnati College Of Medicine in 2016. William Tan holds California license 153997.
- NPI
- 1609379387NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4385068279
- NPI enumeration date
- March 8, 2018
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (310) 540-7676
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 36
- Medical school graduation
- 2016
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
William W. Tan practices at Providence Little Company of Mary Medical Center Torrance in Torrance, California
William Tan's primary practice is Providence Little Company of Mary Medical Center Torrance, at 4101 Torrance Blvd, Torrance, CA 90503 in Los Angeles County. The practice phone is (310) 540-7676.
- Providence Little Company of Mary Medical Center Torrance4101 Torrance Blvd, Torrance, CA 90503 · Los Angeles CountyPhone(310) 540-7676
Source: Dmand AI Affiliation Data
William W. Tan is affiliated with 3 sites of care and 2 medical groups
William Tan's primary practice is Providence Little Company of Mary Medical Center Torrance in Torrance, California, part of Providence Health & Services. William Tan is also affiliated with Cedars-Sinai Medical Center. The medical group on file is South Bay Anesthesia Medical Group. Dmand AI also links William Tan to 1 more hospital and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at William W. Tan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where William Tan practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Providence Little Company of Mary Medical Center Torrance | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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William W. Tan is one of 6,593 anesthesiologists in California
Anesthesiology is William Tan's primary specialty in the NPI Registry, under taxonomy code 207L00000X. William Tan is board certified in anesthesiology by the American Board of Anesthesiology. William Tan is licensed in California.
Specialties and state licenses
- Anesthesiology, CaliforniaPrimary
Anesthesiologists near William Tan
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
William W. Tan billed Medicare for 32 services in 2024
CMS data shows 32 Medicare services from William Tan across 2 procedure codes in 2024, for 124 Medicare patients. Medicare paid $3,186 for them. Every service was in a facility, such as a hospital, rather than an office.
William Tan's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Anesthesia
- 2023: 282024: 3214%
William Tan compared with the California median for anesthesiologists, 2024
- William Tan
- California median
- Medicare services
- 32vs 7256% below
- Medicare patients
- 124vs 14313% below
Medians across 5,562 anesthesiologists in California with Dmand AI profiles that report each measure.
William Tan'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 William Tan?
Medicare shows one payer. Book a meeting to get commercial claims data for William Tan and other anesthesiologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
William W. Tan treated 124 Medicare patients in 2024, average age 73
CMS counts 124 Medicare patients who saw William Tan in 2024. The largest group is 65 to 74, with 49 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 36% are also on Medicaid. Their average risk score is 1.79, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts William Tan's median patient age at 42, with 78% women.
William Tan's Medicare patients by age, 2024
William Tan's Medicare patients by sex, 2024
- Women6956%
- Men5544%
Chronic conditions among William Tan's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis44%
- Chronic kidney disease34%
- Diabetes34%
- Ischemic heart disease31%
- Heart failure27%
- Mood disorders27%
Share of Medicare patients with each condition. A patient can have several.
William Tan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 42
Patient panel by sex, all payers
- Women78%
- Men22%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
How William W. Tan takes part in Medicare
William Tan 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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William W. Tan received $226 in industry payments from 2019 to 2025
CMS Open Payments shows 5 general payments to William Tan from 4 drug and device companies from 2019 to 2025. Food and beverage make up the largest share, 100% of the total. Edwards Lifesciences Corporation paid the most, $134.
General payments to William Tan by program year, 2019 to 2025
Companies that paid William Tan the most, 2019 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
William W. Tan graduated from University Of Cincinnati College Of Medicine
William Tan graduated from University Of Cincinnati College Of Medicine in 2016.
- Medical school
- Board certified in anesthesiology
Source: Dmand AI Professional Profile Data
William W. Tan accepts plans from 3 insurance carriers
William Tan is in network with 3 carriers, including United Healthcare, Blue Cross and Blue Shield of Kansas City and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
- United Healthcare
- Blue Cross and Blue Shield of Kansas City
- CMS Medicare
Plan types William Tan accepts, by number of carriers
- EPO1
- HMO1
- Medicare1
- POS1
Source: Dmand AI Insurance Network Data
Sources for William W. Tan'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) |
| 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 William W. Tan
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is William W. Tan's NPI number?
William W. Tan's NPI number is 1609379387. It was assigned on March 8, 2018, and it is active in the NPI Registry.
What does William W. Tan specialize in?
William W. Tan is an anesthesiologist in Torrance, California. The primary specialty in the NPI Registry is Anesthesiology Physician (taxonomy code 207L00000X).
Where does William W. Tan practice?
William Tan practices at 4101 Torrance Blvd, Torrance, CA 90503. William Tan's primary practice is Providence Little Company of Mary Medical Center Torrance in Torrance, California, part of Providence Health & Services. Dmand AI also links William Tan to 1 hospital and 1 medical group.
What is William W. Tan's office phone number?
The practice phone on file for William Tan is (310) 540-7676.
What is William W. Tan's medical license number?
William Tan holds California license 153997.
Which hospitals is William W. Tan affiliated with?
William Tan practices at Providence Little Company of Mary Medical Center Torrance in Torrance, California. William Tan is also affiliated with Cedars-Sinai Medical Center. Dmand AI links William Tan to 1 more hospital.
What medical group is William W. Tan part of?
William Tan is linked to South Bay Anesthesia Medical Group. Dmand AI links William Tan to 1 more medical group.
Does William W. Tan accept Medicare?
Yes. CMS data shows William Tan billed Medicare for 32 services in 2024, and William Tan accepts Medicare assignment.
How many Medicare patients does William W. Tan see?
CMS counts 124 Medicare patients who saw William Tan in 2024, with an average age of 73.
Is William W. Tan board certified?
Yes. William Tan is board certified in anesthesiology by the American Board of Anesthesiology.
Show 5 more questionsShow fewer questions
What services does William W. Tan bill to Medicare?
In 2024, William Tan's most billed Medicare services were anesthesia (00142) and anesthesia (00731).
Where did William W. Tan go to medical school?
William Tan graduated from University Of Cincinnati College Of Medicine in 2016.
Has William W. Tan received payments from drug or device companies?
CMS Open Payments shows $226 in general payments to William Tan from 4 companies from 2019 to 2025. The largest total came from Edwards Lifesciences Corporation.
How long has William W. Tan been practicing?
William Tan graduated from medical school in 2016, 10 years ago.
What insurance does William W. Tan accept?
William Tan is in network with 3 carriers, including United Healthcare, Blue Cross and Blue Shield of Kansas City and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
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