Colton Mason Tom
Internal Medicine Physician · Oakland, CA
Colton Mason Tom is an internal medicine physician with a practice address in Oakland, California, and NPI 1336729730, issued on Apr 9, 2021. Check the license (California A185003, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Colton Mason Tom
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A185003 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3600 Broadway, Oakland, CA 94611
- Phone
- (510) 926-0422
- Enumerated
- Apr 9, 2021
- Record last updated
- Jan 30, 2025
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 3600 Broadway
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Colton Mason Tom in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A185003Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
91% fewer Medicare Part D claims than the average internal medicine physician in 2024
281 Medicare Part D claims for 64 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Levothyroxine Sodium17 claims
- Amlodipine Besylate13 claims
- Atorvastatin Calcium13 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $100.27
1 payment: food and beverage; the largest payer was Amgen Inc. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Colton Mason Tom among 17,696 internal medicine physician records in California
Colton Mason Tom is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 92% of them.
- NPI issued2021 · 92% of these records are older, 5% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2025 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
432 internal medicine physician records list a practice address in Oakland
They are 432 of the 18,558 NPPES records with a practice address in Oakland, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Oakland → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Thomas Baudendistel, MDOakland, CA 946111801820436
- Rachel Canning, MDOakland, CA 946111386657609
- Howard Chang, MDOakland, CA 946111700845336
- Roopal Desai, MDOakland, CA 946111699861484
- Matthew Frankel, M.D., M.B.AOakland, CA 946111568542405
- Thomas Hackford, M.D.Oakland, CA 946111972598639
- Jacqueline Kiang, MDOakland, CA 946111376506600
- Katherine McLane, MDOakland, CA 946111447270186
Common questions
What is Colton Mason Tom's NPI number?
Colton Mason Tom's National Provider Identifier (NPI) is 1336729730, issued on Apr 9, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Colton Mason Tom located?
The NPPES record lists a practice address at 3600 Broadway, Oakland, CA, 94611. Phone: (510) 926-0422. Providers update this record themselves, so call before visiting.
How can I verify Colton Mason Tom's license?
NPPES lists California license number A185003, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Colton Mason Tom prescribe under Medicare Part D?
In 2024, Colton Mason Tom had 281 Medicare Part D claims for 64 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.