Dr. Thomas C. Williams, MD
- Medicare services, 2019
- 106
- Part D claims, 2024
- 20
- Industry payments
- $23
- Medical group
- 1
- Insurance carriers
- 2
- Practice address
- 642 Mandana Blvd, Oakland, CA 94610-2333
- Practice phone
- Call (510) 504-1226
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Medical group
Find Dr. Williams' 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. Thomas C. Williams is a pulmonologist in Oakland, California
Dr. Williams practices with Telehealth Medical Group, a medical group.
Dr. Williams' NPI, 1619004967, was assigned on February 27, 2007. Dr. Williams graduated from Albany Medical College in 1975. Dr. Williams holds California license G32747.
- NPI
- 1619004967NPI Registry (opens in a new tab)
- NPI enumeration date
- February 27, 2007
- NPI status
- Active
- Practice phone
- (510) 504-1226
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Medical school graduation
- 1975
Sources: NPPES NPI Registry (CMS); and Dmand AI Professional Profile Data
Dr. Thomas C. Williams' practice address is in Oakland, California
Dr. Williams' practice address in the NPI Registry is 642 Mandana Blvd, Oakland, CA 94610-2333. The practice phone is (510) 504-1226.
- NPI Registry address642 Mandana Blvd, Oakland, CA 94610-2333Phone(510) 504-1226
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Thomas C. Williams is affiliated with 1 medical group
Dr. Williams is part of Telehealth Medical Group, a medical group in Santa Rosa, California.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Thomas C. Williams' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Williams practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Telehealth Medical Group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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Dr. Thomas C. Williams is one of 1,339 pulmonologists in California
Pulmonary disease is Dr. Williams' primary specialty in the NPI Registry, under taxonomy code 207RP1001X. Dr. Williams is board certified in internal medicine by the American Board of Internal Medicine. Dr. Williams is licensed in California.
Specialties and state licenses
- Pulmonary disease, CaliforniaPrimary
Pulmonologists near Dr. Williams
Counts of pulmonologists 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. Thomas C. Williams billed Medicare for 106 services in 2019
CMS data shows 106 Medicare services from Dr. Williams across 3 procedure codes in 2019. Medicare paid $16,558 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Williams' Medicare services by type, 2018 to 2019
- 2018
- 2019
- Office and hospital visits
- 2018: 2882019: 10663%
Dr. Williams compared with the California median for pulmonologists, 2019
- Dr. Williams
- California median
- Medicare services
- 106vs 64984% below
Medians across 1,263 pulmonologists in California with Dmand AI profiles that report each measure.
Dr. Williams' most billed Medicare procedure codes, 2019
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. Williams?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Williams and other pulmonologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Thomas C. Williams' patients have a median age of 78
Across all payers, Dmand AI patient panel data puts Dr. Williams' median patient age at 78, with 0% women.
Dr. Williams' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 78
Patient panel by sex, all payers
- Women0%
- Men100%
Source: Dmand AI Patient Panel Data
Dr. Thomas C. Williams wrote 20 Medicare Part D claims in 2024
In 2024, Dr. Williams wrote 20 Medicare Part D claims. 95% of them were for generic drugs.
Dr. Williams' Part D claims by kind of drug, 2024
- Generic19 claims95%
- Brand-name and other1 claims5%
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
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Dr. Thomas C. Williams received $23 in industry payments in 2025
CMS Open Payments shows 1 general payment to Dr. Williams from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. Stryker Corporation paid the most, $23.
Companies that paid Dr. Williams the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Thomas C. Williams graduated from Albany Medical College
Dr. Williams graduated from Albany Medical College in 1975.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Thomas C. Williams accepts plans from 2 insurance carriers
Dr. Williams is in network with 2 carriers, including Blue Cross Blue Shield of Massachusetts and HCSC. Medicare plans come from the most carriers, 2. Check the plan with the practice before a visit.
- Blue Cross Blue Shield of Massachusetts
- HCSC
Plan types Dr. Williams accepts, by number of carriers
- Medicare2
- PPO2
Source: Dmand AI Insurance Network Data
Sources for Dr. Thomas C. Williams'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 |
| 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 Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider (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. Thomas C. Williams
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. Thomas C. Williams' NPI number?
Dr. Thomas C. Williams' NPI number is 1619004967. It was assigned on February 27, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Thomas C. Williams?
Dr. Thomas C. Williams is a pulmonologist in Oakland, California. The primary specialty in the NPI Registry is Pulmonary Disease Physician (taxonomy code 207RP1001X).
Where does Dr. Thomas C. Williams practice?
Dr. Williams practices at 642 Mandana Blvd, Oakland, CA 94610-2333. Dr. Williams' primary practice is Telehealth Medical Group, a medical group.
What is Dr. Thomas C. Williams' office phone number?
The practice phone on file for Dr. Williams is (510) 504-1226.
What is Dr. Thomas C. Williams' medical license number?
Dr. Williams holds California license G32747.
What medical group is Dr. Thomas C. Williams part of?
Dr. Williams is part of Telehealth Medical Group in Santa Rosa, California.
Does Dr. Thomas C. Williams accept Medicare?
Yes. CMS data shows Dr. Williams billed Medicare for 106 services in 2019.
Is Dr. Thomas C. Williams board certified?
Yes. Dr. Williams is board certified in internal medicine by the American Board of Internal Medicine.
What services does Dr. Thomas C. Williams bill to Medicare?
In 2019, Dr. Williams' most billed Medicare services were critical care (99291), hospital inpatient care (99233) and hospital inpatient care (99223).
Where did Dr. Thomas C. Williams go to medical school?
Dr. Williams graduated from Albany Medical College in 1975.
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Has Dr. Thomas C. Williams received payments from drug or device companies?
CMS Open Payments shows $23 in general payments to Dr. Williams from 1 company from 2025 to 2025. The largest total came from Stryker Corporation.
How long has Dr. Thomas C. Williams been practicing?
Dr. Williams graduated from medical school in 1975, 51 years ago.
What insurance does Dr. Thomas C. Williams accept?
Dr. Williams is in network with 2 carriers, including Blue Cross Blue Shield of Massachusetts and HCSC. Medicare plans come from the most carriers, 2. Check the plan with the practice before a visit.
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