Zachary Thomas Call, MD
Internal Medicine Physician · San Francisco, CA
Zachary Thomas Call, MD is an internal medicine physician with a practice address in San Francisco, California, and NPI 1760944805, issued on Apr 5, 2019. Check the license (California A177024, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Zachary Thomas Call
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A177024 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1101 Van Ness Ave, San Francisco, CA 94109
- Phone
- (925) 634-9704
- Enumerated
- Apr 5, 2019
- Record last updated
- Aug 29, 2024
- Medicare enrollment
- Enrolled (PECOS I20220822001966); accepts Medicare assignment
- Medical or professional school
- University Of Texas Medical School At Houston, 2019
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 1101 Van Ness Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Zachary Thomas Call in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A177024Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average internal medicine physician in 2024
129 Medicare Part D claims for 83 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 11 claims were for opioids.
Most prescribed
- Amoxicillin-Clavulanate Potass14 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 97.2 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $14.75
1 payment: food and beverage; the largest payer was Alkermes, 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.
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
- Galen Inpatient Physicians PCGreenbrae, CA
- Pacific Inpatient Medical GroupSan Francisco, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Zachary Thomas Call among 17,696 internal medicine physician records in California
Zachary Thomas Call, 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 2019, is newer than 86% of them.
- NPI issued2019 · 86% of these records are older, 11% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2019 · median 2004 among the 11,065 with a school on file
- Record last updated2024 · 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
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- Edwin Hassid, M.D.San Francisco, CA 941091033140702
- Gayatri Khanna, M.D.San Francisco, CA 941091639191455
- Martin Liberman, MDSan Francisco, CA 941091376530006
- Deborah Lindes, M.D.San Francisco, CA 941091952323776
- Aravind Mani, MDSan Francisco, CA 941091932151941
Common questions
What is Zachary Thomas Call, MD's NPI number?
Zachary Thomas Call, MD's National Provider Identifier (NPI) is 1760944805, issued on Apr 5, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Zachary Thomas Call, MD located?
The NPPES record lists a practice address at 1101 Van Ness Ave, San Francisco, CA, 94109. Phone: (925) 634-9704. Providers update this record themselves, so call before visiting.
How can I verify Zachary Thomas Call, MD's license?
NPPES lists California license number A177024, 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 Zachary Thomas Call, MD prescribe under Medicare Part D?
In 2024, Zachary Thomas Call, MD had 129 Medicare Part D claims for 83 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Zachary Thomas Call, MD's MIPS final score?
The 2023 MIPS final score is 97.2 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.