NPPES file of Aug 9, 2026

Allan Sykes Treadwell, M.D.

Internal Medicine Physician · San Francisco, CA

Allan Sykes Treadwell, M.D. is an internal medicine physician with a practice address in San Francisco, California, and NPI 1477575744, issued on Jul 24, 2006. Check the license (California G74876, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1477575744
Name
Allan Sykes Treadwell
Credential
M.D.
Primary taxonomy
Internal Medicine Physician 207R00000X
License number
G74876 CA
Self-reported in NPPES; status is on the state search
Practice location
350 Parnassus Ave, San Francisco, CA 94117
Phone
(415) 476-2752
Enumerated
Jul 24, 2006
Record last updated
Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →

Also registered at 350 Parnassus Ave

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Karen Bagatelos, M.S.N.,N.P.Nurse Practitioner1780881045
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  3. Eric Buxton, M.D.Endocrinology, Diabetes & Metabolism Physician1134210362
  4. Alan Chong, D.D.SGeneral Practice Dentistry1013265701
  5. Gregory Chong, D.D.S.General Practice Dentistry1023130747
  6. Thomas Cicciarelli, PSY.D.Clinical Psychologist1598871865

Verify Allan Sykes Treadwell in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license G74876    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the California license search

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22% fewer Medicare Part D claims than the average internal medicine physician in 2024

2,471 Medicare Part D claims for 142 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 46 claims were for opioids.

  1. Allan Treadwell2,471
  2. Specialty average3,176

Most prescribed

  1. Atorvastatin Calcium127 claims
  2. Amlodipine Besylate98 claims
  3. Gabapentin74 claims
  4. Zolpidem Tartrate63 claims
  5. Simvastatin62 claims
  6. Tamsulosin Hcl62 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: $59.65

1 payment: food and beverage; the largest payer was Cleerly, Inc. 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.

  1. Allan Treadwell$59.65
  2. Specialty average$1,303.06

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Allan Sykes Treadwell among 17,696 internal medicine physician records in California

Allan Sykes Treadwell, M.D. 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 2006, is newer than 5% of them.

  • NPI issued2006 · 5% of these records are older, 56% newer
  • In a Medicare fileYes · 79% of these records are
  • In the CMS Doctors and Clinicians fileNo · 63% of these records are
  • Record last updated2007 · 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).

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 17,696 in California → Every provider in San Francisco → Internal Medicine Physician nationwide →

The 8 internal medicine physician records with the nearest ZIP codes

  1. Pedro Aceves-Casillas, M.D.San Francisco, CA 941171144252396
  2. Charles Allison, M.D.San Francisco, CA 941171376541060
  3. Carl Bricca, D.O.San Francisco, CA 941171114925385
  4. Robert BrodySan Francisco, CA 941171801815600
  5. Kwok Chan, M.D.San Francisco, CA 941171063413714
  6. Diana Hilbert, M.D.San Francisco, CA 941171386642551
  7. William Kell, M.DSan Francisco, CA 941171528094547
  8. Kenneth Maybury, M.D.San Francisco, CA 941171295733459

Common questions

What is Allan Sykes Treadwell, M.D.'s NPI number?

Allan Sykes Treadwell, M.D.'s National Provider Identifier (NPI) is 1477575744, issued on Jul 24, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Allan Sykes Treadwell, M.D. located?

The NPPES record lists a practice address at 350 Parnassus Ave, San Francisco, CA, 94117. Phone: (415) 476-2752. Providers update this record themselves, so call before visiting.

How can I verify Allan Sykes Treadwell, M.D.'s license?

NPPES lists California license number G74876, 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 Allan Sykes Treadwell, M.D. prescribe under Medicare Part D?

In 2024, Allan Sykes Treadwell, M.D. had 2,471 Medicare Part D claims for 142 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.