Charles Allison, M.D.
Internal Medicine Physician · San Francisco, CA
Charles Allison, M.D. is an internal medicine physician with a practice address in San Francisco, California, and NPI 1376541060, issued on Jul 7, 2005. Check the license (California C33715, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Charles Allison
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- C33715 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1 Shrader St, San Francisco, CA 94117
- Phone
- (415) 752-0100
- Enumerated
- Jul 7, 2005
- Record last updated
- Sep 10, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (415) 752-7103
- Medicare enrollment
- Enrolled (PECOS I20081202000732); accepts Medicare assignment
- Medical or professional school
- University Of Minnesota Medical School, 1967
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 1 Shrader St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sergio Bello, MDCardiovascular Disease Physician1407868367
- Carl Bricca, D.O.Internal Medicine Physician1114925385
- Jeaniesar Caluag, M.D.Internal Medicine Physician1720246705
- Jose Eguia, MDInfectious Disease Physician1972565307
- Robert Ellis, M.D.Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician1710036777
- Benjamin Fong, MDFamily Medicine Physician1467464867
Verify Charles Allison in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C33715Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
47% more Medicare Part D claims than the average internal medicine physician in 2024
4,666 Medicare Part D claims for 587 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims. 196 claims were for opioids.
Most prescribed
- Atorvastatin Calcium429 claims
- Lisinopril220 claims
- Metformin Hcl190 claims
- Amlodipine Besylate186 claims
- Hydrochlorothiazide152 claims
- Levothyroxine Sodium135 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: $1,861.01
81 payments; by number, the most common kind was food and beverage; the largest payer was ViiV Healthcare Company. 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.
Bills Medicare through 2 group practices
- Dignity HealthSan Francisco, CA
- Mercy Doctors 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
- Jacob Aaron, MDSan Francisco, CA1407202518
- Alistair Aaronson, MDStanford, CA1457628760
- Jose Abad., MDSacramento, CA1144607219
- Donna Abare, MDOakland, CA1386722155
- Marce AbareScotts Valley, CA1457744708
- Samuel Abarte, M.D.Chula Vista, CA1578535498
- Alexander Abary, MDLong Beach, CA1104995919
- Luba Abascal, MDSan Francisco, CA1023180874
- Michael Abate, MDSacramento, CA1548248131
- Wali Abawi, D.O.Joshua Tree, CA1104362268
Common questions
What is Charles Allison, M.D.'s NPI number?
Charles Allison, M.D.'s National Provider Identifier (NPI) is 1376541060, issued on Jul 7, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Charles Allison, M.D. located?
The NPPES record lists a practice address at 1 Shrader St, San Francisco, CA, 94117. Phone: (415) 752-0100. Providers update this record themselves, so call before visiting.
How can I verify Charles Allison, M.D.'s license?
NPPES lists California license number C33715, 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 Charles Allison, M.D. prescribe under Medicare Part D?
In 2024, Charles Allison, M.D. had 4,666 Medicare Part D claims for 587 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.