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THOMAS C WILLIAMS M.D.
NPI 1619004967
Internal Medicine - Pulmonary Disease in Oakland, CA

Active since February 27, 2007PECOS Enrolled
642 MANDANA BLVD, OAKLAND, CA 94610(510) 504-1226 Get Directions Write a Review

NPPES record last updated: March 31, 2021. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Thomas C Williams M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

THOMAS C WILLIAMS M.D. (NPI 1619004967) is an individual pulmonary disease provider in Oakland, California, licensed in California (G32747) and active in the NPI registry since February 2007. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1619004967
Entity TypeIndividualMale
Primary Taxonomy207RP1001X
Provider Legal NameTHOMAS C WILLIAMSCredential: M.D.
Location Address642 MANDANA BLVDOakland, CA 94610-2333
Mailing Address642 Mandana BlvdOakland, CA 94610-2333 · (510) 504-1226
Phone(510) 504-1226
Sole ProprietorYes
Enumeration DateFebruary 27, 2007
Last NPPES UpdateMarch 31, 2021
NPPES CertifiedMarch 31, 2021
✔ NPI 1619004967 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Pulmonary DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RP1001X
License✔ Licensed in CA · G32747
Definition
An internist who treats diseases of the lungs and airways. The pulmonologist diagnoses and treats cancer, pneumonia, pleurisy, asthma, occupational and environmental diseases, bronchitis, sleep disorders, emphysema and other complex disorders of the lungs.
642 MANDANA BLVD, Oakland, CA 94610
Open in Google Maps ↗

Other Identifiers 1

Medicaid00G327471CA

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Thomas C Williams M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94610 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$153.83 typical visit price
range $69.00 – $202.35
Typical copayment $38.45 (range $17.25 – $50.58)
Most-billed visit code 99204
Established Patient
$119.48 typical visit price
range $23.44 – $166.46
Typical copayment $29.87 (range $5.86 – $41.61)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Thomas Williams's NPI number?

The NPI number for Thomas Williams is 1619004967. It was assigned to this individual provider in the NPPES registry on February 27, 2007.

Where is Thomas Williams located?

Thomas Williams practices at 642 Mandana Blvd, Oakland, CA 94610. The listed phone number is (510) 504-1226.

What is Thomas Williams's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Pulmonary Disease, with taxonomy code 207RP1001X.

Is Thomas Williams enrolled in Medicare?

Yes. Thomas Williams is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Thomas Williams was last updated on March 31, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.