Lesley A. Aiken, MD
Internal Medicine Physician · San Francisco, CA
Lesley A. Aiken, MD is an internal medicine physician with a practice address in San Francisco, California, and NPI 1629156120, issued on Nov 1, 2006. Check the license (California A84452, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Lesley A. Aiken
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A84452 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2200 Ofarrell St, San Francisco, CA 94115
- Phone
- (415) 833-2000
- Enumerated
- Nov 1, 2006
- Record last updated
- Dec 9, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20031215000401); accepts Medicare assignment
- Medical or professional school
- George Washington University School Of Medicine, 2000
- Entity
- Type 1 · individual
Also registered at 2200 Ofarrell St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Lesley A. Aiken in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A84452Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
20% fewer Medicare Part D claims than the average internal medicine physician in 2024
2,537 Medicare Part D claims for 374 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 6% of claims. 16 claims were for opioids.
Most prescribed
- Atorvastatin Calcium327 claims
- Amlodipine Besylate163 claims
- Levothyroxine Sodium141 claims
- Lisinopril-Hydrochlorothiazide132 claims
- Losartan Potassium113 claims
- Hydrochlorothiazide103 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.
Bills Medicare through one group practice
- Permanente Medical Group IncSan Francisco, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
1,318 internal medicine physician records list a practice address in San Francisco
They are 1,318 of the 38,143 NPPES records with a practice address in San Francisco, and 17,696 internal medicine physician records in California.
All 1,318 in San Francisco → All 17,696 in California → Every provider in San Francisco →
Other internal medicine physician records in California
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- Luba Abascal, MDSan Francisco, CA1023180874
- Michael Abate, MDSacramento, CA1548248131
- Wali Abawi, D.O.Joshua Tree, CA1104362268
Common questions
What is Lesley A. Aiken, MD's NPI number?
Lesley A. Aiken, MD's National Provider Identifier (NPI) is 1629156120, issued on Nov 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Lesley A. Aiken, MD located?
The NPPES record lists a practice address at 2200 Ofarrell St, San Francisco, CA, 94115. Phone: (415) 833-2000. Providers update this record themselves, so call before visiting.
How can I verify Lesley A. Aiken, MD's license?
NPPES lists California license number A84452, 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 Lesley A. Aiken, MD prescribe under Medicare Part D?
In 2024, Lesley A. Aiken, MD had 2,537 Medicare Part D claims for 374 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.