David J. Sly, DO
Family Medicine Physician · San Francisco, CA
David J. Sly, DO is a family medicine physician with a practice address in San Francisco, California, and NPI 1255387148, issued on May 25, 2006. Check the license (California 20A22993, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- David J. Sly
- Credential
- DO
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License numbers
- 20A22993 CA
22993 CA
008715 AZ
02882 IA
223 NE
Self-reported in NPPES; status is on the state search - Practice location
- 2 W Portal Ave, San Francisco, CA 94127
- Phone
- (888) 663-6331
- Enumerated
- May 25, 2006
- Record last updated
- Aug 25, 2025
- Fax
- (415) 252-7176
- Medicare enrollment
- Enrolled (PECOS I20240415003376); accepts Medicare assignment
- Medical or professional school
- At Still University Of Health Sciences, College Of Osteo Med, Kirksville, 1990
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 2 W Portal Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Katherine Clarke, CRNPNurse Practitioner1659071801
- Petia Kremen, MDInternal Medicine Physician1861570418
- Victoria Lau, D.O.Family Medicine Physician1336482298
- Nina Metsovaara, NP-C, FNPFamily Nurse Practitioner1356706634
- Anna Tellefsen, NPPediatric Nurse Practitioner1982342770
- Chelsea Thomsen, M.D., M.S.P.HInternal Medicine Physician1003227927
Verify David J. Sly in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A22993Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
82% fewer Medicare Part D claims than the average family medicine physician in 2024
642 Medicare Part D claims for 326 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium49 claims
- Levothyroxine Sodium45 claims
- Rosuvastatin Calcium32 claims
- Lisinopril31 claims
- Tamsulosin Hcl27 claims
- Amlodipine Besylate26 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 2 group practices
- Iora Senior Health LLCPhoenix, AZ
- Seton Family OF DoctorsAustin, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
David J. Sly among 17,133 family medicine physician records in California
David J. Sly, DO is one of 17,133 family medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 59% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated1990 · median 2005 among the 10,652 with a school on file
- Record last updated2025 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Family Medicine Physician providers in California
There are 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in San Francisco → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Victoria Lau, D.O.San Francisco, CA 941271336482298
- Marie Lewandowski, MDSan Francisco, CA 941271922182625
- James Park, MDSan Francisco, CA 941271669539375
- Michael Siu, M.D.San Francisco, CA 941271528123247
- Dennis Korpman, MDSan Francisco, CA 941281053688531
- Arnold Traynis, MDSan Francisco, CA 941251962456749
- Robert Franklin, MDSan Francisco, CA 941241801975933
- Catherine Olson, MDSan Francisco, CA 941241982731972
Common questions
What is David J. Sly, DO's NPI number?
David J. Sly, DO's National Provider Identifier (NPI) is 1255387148, issued on May 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is David J. Sly, DO located?
The NPPES record lists a practice address at 2 W Portal Ave, San Francisco, CA, 94127. Phone: (888) 663-6331. Providers update this record themselves, so call before visiting.
How can I verify David J. Sly, DO's license?
NPPES lists California license number 20A22993, 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 David J. Sly, DO prescribe under Medicare Part D?
In 2024, David J. Sly, DO had 642 Medicare Part D claims for 326 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.