Dr. Willie O. Siu, MD, DPHIL
- Medicare services, 2016
- 200
- Industry payments
- $2,031
- State license
- 1
- Year NPI issued
- 2011
- Practice address
- 1105 Massachusetts Ave, Cambridge, MA 02138-5220
- Practice phone
- Call (617) 299-6794
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Siu'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. Willie O. Siu is a psychiatrist in Cambridge, Massachusetts
Dr. Siu practices in Cambridge, Massachusetts.
Dr. Siu's NPI, 1407142961, was assigned on June 23, 2011. Dr. Siu graduated from David Geffen School of Medicine at UCLA in 2011. Dr. Siu holds Massachusetts license 258978.
- NPI
- 1407142961NPI Registry (opens in a new tab)
- NPI enumeration date
- June 23, 2011
- NPI status
- Active
- Practice phone
- (617) 299-6794
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Medical school graduation
- 2011
Sources: NPPES NPI Registry (CMS); and Dmand AI Professional Profile Data
Dr. Willie O. Siu's practice address is in Cambridge, Massachusetts
Dr. Siu's practice address in the NPI Registry is 1105 Massachusetts Ave, Cambridge, MA 02138-5220. The practice phone is (617) 299-6794.
- NPI Registry address1105 Massachusetts Ave, Cambridge, MA 02138-5220Phone(617) 299-6794
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dmand AI tracks the EHR system at Dr. Willie O. Siu's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Siu practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dr. Siu's practice | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across each health system and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Willie O. Siu is one of 1,857 psychiatrists in Massachusetts
Psychiatry is Dr. Siu's primary specialty in the NPI Registry, under taxonomy code 2084P0800X. Dr. Siu is licensed in Massachusetts.
Specialties and state licenses
- Psychiatry, MassachusettsPrimary
Psychiatrists near Dr. Siu
Counts of psychiatrists 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. Willie O. Siu billed Medicare for 200 services in 2016
CMS data shows 200 Medicare services from Dr. Siu across 4 procedure codes in 2016. Medicare paid $12,104 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Siu's Medicare services by type, 2016
- Office and hospital visits150
- Tests and treatments50
Dr. Siu compared with the Massachusetts median for psychiatrists, 2016
- Dr. Siu
- Massachusetts median
- Medicare services
- 200vs 17216% above
Medians across 2,056 psychiatrists in Massachusetts with Dmand AI profiles that report each measure.
Dr. Siu's most billed Medicare procedure codes, 2016
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. Siu?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Siu and other psychiatrists in Massachusetts.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Willie O. Siu received $2,031 in industry payments from 2018 to 2019
CMS Open Payments shows 6 general payments to Dr. Siu from 1 drug or device company from 2018 to 2019. Travel and lodging make up the largest share, 73% of the total. Penumbra, Inc. paid the most, $2,031.
General payments to Dr. Siu by program year, 2018 to 2019
General payments to Dr. Siu by kind, 2018 to 2019
- Travel and lodging$1,48673%
- Food and beverage$54527%
Companies that paid Dr. Siu the most, 2018 to 2019
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Willie O. Siu graduated from David Geffen School of Medicine at UCLA
Dr. Siu graduated from David Geffen School of Medicine at UCLA in 2011.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Willie O. Siu'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice 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 |
| 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. Willie O. Siu
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. Willie O. Siu's NPI number?
Dr. Willie O. Siu's NPI number is 1407142961. It was assigned on June 23, 2011, and it is active in the NPI Registry.
What kind of doctor is Dr. Willie O. Siu?
Dr. Willie O. Siu is a psychiatrist in Cambridge, Massachusetts. The primary specialty in the NPI Registry is Psychiatry Physician (taxonomy code 2084P0800X).
Where does Dr. Willie O. Siu practice?
Dr. Siu practices at 1105 Massachusetts Ave, Cambridge, MA 02138-5220.
What is Dr. Willie O. Siu's office phone number?
The practice phone on file for Dr. Siu is (617) 299-6794.
What is Dr. Willie O. Siu's medical license number?
Dr. Siu holds Massachusetts license 258978.
Does Dr. Willie O. Siu accept Medicare?
Yes. CMS data shows Dr. Siu billed Medicare for 200 services in 2016.
What services does Dr. Willie O. Siu bill to Medicare?
In 2016, Dr. Siu's most billed Medicare services were hospital inpatient care (99231), psychiatric service (90792) and hospital inpatient care (99238).
Where did Dr. Willie O. Siu go to medical school?
Dr. Siu graduated from David Geffen School of Medicine at UCLA in 2011.
Has Dr. Willie O. Siu received payments from drug or device companies?
CMS Open Payments shows $2,031 in general payments to Dr. Siu from 1 company from 2018 to 2019. The largest total came from Penumbra, Inc.
How long has Dr. Willie O. Siu been practicing?
Dr. Siu graduated from medical school in 2011, 15 years ago.
Selling to psychiatry practices?
See psychiatrists in Massachusetts by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card