Kathleen Chak
Geriatric Medicine (Internal Medicine) Physician · Pismo Beach, CA
Kathleen Chak is a geriatric medicine (internal medicine) physician with a practice address in Pismo Beach, California, and NPI 1356754659, issued on Jun 4, 2014. Check the license (California 20A14324, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Kathleen Chak
- Primary taxonomy
- Geriatric Medicine (Internal Medicine) Physician 207RG0300X
- License number
- 20A14324 CA
Self-reported in NPPES; status is on the state search - Practice location
- 877 Oak Park Blvd, Pismo Beach, CA 93449
- Phone
- (805) 474-8450
- Enumerated
- Jun 4, 2014
- Entity
- Type 1 · individual
Also registered at 877 Oak Park Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- David Bernhardt, M.D.Internal Medicine Physician1720061013
- Linda Bjornson, GNPNurse Practitioner1689804478
- David Christensen, M.D.Emergency Medicine Physician1932145620
- Amanda Dillen, D.O.Family Medicine Physician1760413074
- Jennifer Gingrich, P.A.-CPhysician Assistant1578506614
- Karen Goodman, MDFamily Medicine Physician1386686202
Verify Kathleen Chak in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A14324Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
2.0 times the Medicare Part D claims of the average geriatric medicine (internal medicine) physician in 2024
8,864 Medicare Part D claims for 797 beneficiaries, against an average of 4,420 among the 2,888 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 97 claims were for opioids.
Most prescribed
- Rosuvastatin Calcium635 claims
- Atorvastatin Calcium624 claims
- Levothyroxine Sodium539 claims
- Amlodipine Besylate534 claims
- Losartan Potassium342 claims
- Hydrochlorothiazide301 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: $144.92
7 payments, mostly food and beverage; the largest payer was Pfizer Inc.. The 1,049 providers of this specialty with any payment received $1,935.44 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.
One hospital or facility affiliation
- Pacific Central Coast Health CentersPismo Beach, CA
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Geriatric Medicine (Internal Medicine) Physician providers in California
There are 498 geriatric medicine (internal medicine) physician records in California.
Other geriatric medicine (internal medicine) physician records in California
- Adil Abbasi, M.D.La Jolla, CA1548261316
- Shashidar Acharya, M.D.Orange, CA1770685521
- Pouya Afshar, M.D.San Diego, CA1184958977
- Parag Agnihotri, M.D.San Diego, CA1447351085
- Andreas Ahlas, M.D.Bakersfield, CA1326200833
- Waseem Ahmed, MDSanta Rosa, CA1386803559
- Paul AisenSan Diego, CA1669470753
- Mahmuda Alam, M.D.Glendale, CA1568659985
- Francis Allinson, MDLa Jolla, CA1679062707
- Anna Almonte, M.D., D.O.Sacramento, CA1104970946
Common questions
What is Kathleen Chak's NPI number?
Kathleen Chak's National Provider Identifier (NPI) is 1356754659, issued on Jun 4, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Kathleen Chak located?
The NPPES record lists a practice address at 877 Oak Park Blvd, Pismo Beach, CA, 93449. Phone: (805) 474-8450. Providers update this record themselves, so call before visiting.
How can I verify Kathleen Chak's license?
NPPES lists California license number 20A14324, 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 Kathleen Chak prescribe under Medicare Part D?
In 2024, Kathleen Chak had 8,864 Medicare Part D claims for 797 beneficiaries; the average among geriatric medicine (internal medicine) physician prescribers was 4,420. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.