Karen Ann Fong, MD
Internal Medicine Physician · San Luis Obispo, CA
Karen Ann Fong, MD is an internal medicine physician with a practice address in San Luis Obispo, California, and NPI 1851396816, issued on Jun 16, 2005. Check the license (California G70251, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Karen Ann Fong
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- G70251 CA
G070251 CA
Self-reported in NPPES; status is on the state search - Practice location
- 184 Casa St, San Luis Obispo, CA 93405
- Phone
- (805) 242-4455
- Enumerated
- Jun 16, 2005
- Record last updated
- Nov 22, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (805) 542-9589
- Medicare enrollment
- Enrolled (PECOS I20100304000119); accepts Medicare assignment
- Medical or professional school
- University Of California, Geffen School Of Medicine, 1989
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 184 Casa St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Christine Clickard, FNPObstetrics & Gynecology Nurse Practitioner1659594182
- Alexandra Santos, NP-FObstetrics & Gynecology Nurse Practitioner1770726010
- Arthur Segal, MDGynecology Physician1790787174
Verify Karen Ann Fong in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G70251Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
52% more Medicare Part D claims than the average internal medicine physician in 2024
4,837 Medicare Part D claims for 222 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims. 179 claims were for opioids.
Most prescribed
- Levothyroxine Sodium215 claims
- Ezetimibe201 claims
- Atorvastatin Calcium195 claims
- Amlodipine Besylate146 claims
- Rosuvastatin Calcium111 claims
- Omeprazole106 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: $231.59
8 payments; by number, the most common kind was food and beverage; the largest payer was Lilly USA, LLC. 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.
Karen Ann Fong among 17,696 internal medicine physician records in California
Karen Ann Fong, MD 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 95% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1989 · median 2004 among the 11,065 with a school on file
- Record last updated2019 · 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).
41 internal medicine physician records list a practice address in San Luis Obispo
They are 41 of the 3,403 NPPES records with a practice address in San Luis Obispo, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in San Luis Obispo → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Barbara Bailey, M.D.San Luis Obispo, CA 934051184984825
- Gayle Cekada, M.DSan Luis Obispo, CA 934051114996055
- Frank Collie, MDSan Luis Obispo, CA 934051861496879
- Philippe Duhaime, M.DSan Luis Obispo, CA 934051043692866
- Camilo Guiang, MDSan Luis Obispo, CA 934051881886935
- Stephen Hilty, M.D.San Luis Obispo, CA 934051205839818
- Ihab Ibrahim, MDSan Luis Obispo, CA 934051417062712
- Luke Moselle, MDSan Luis Obispo, CA 934051457915258
Common questions
What is Karen Ann Fong, MD's NPI number?
Karen Ann Fong, MD's National Provider Identifier (NPI) is 1851396816, issued on Jun 16, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Karen Ann Fong, MD located?
The NPPES record lists a practice address at 184 Casa St, San Luis Obispo, CA, 93405. Phone: (805) 242-4455. Providers update this record themselves, so call before visiting.
How can I verify Karen Ann Fong, MD's license?
NPPES lists California license number G70251, 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 Karen Ann Fong, MD prescribe under Medicare Part D?
In 2024, Karen Ann Fong, MD had 4,837 Medicare Part D claims for 222 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.