Mary J. Malloy, M.D.
Pediatrics Physician · San Francisco, CA
Mary J. Malloy, M.D. is a pediatrics physician with a practice address in San Francisco, California, and NPI 1679500391, issued on Jun 27, 2006. Check the license (California A20800, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Mary J. Malloy
- Credential
- M.D.
- Primary taxonomy
- Pediatrics Physician 208000000X
- License number
- A20800 CA
Self-reported in NPPES; status is on the state search - Practice location
- 400 Parnassus Ave, San Francisco, CA 94143
- Phone
- (415) 353-2350
- Enumerated
- Jun 27, 2006
- Record last updated
- Jul 29, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (415) 353-2337
- Medicaid ID
- 00A208000 CA
- Medicare enrollment
- Enrolled (PECOS I20080418000563); accepts Medicare assignment
- Medical or professional school
- University Of California, San Francisco School Of Medicine, 1962
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest pediatrics physician records → All 9,272 in California → Look up another NPI →
Also registered at 400 Parnassus Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Justin Ahn, M.D.Urology Physician1063755148
- Weiyun Ai, MDMedical Oncology Physician1649346842
Verify Mary J. Malloy in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A20800Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
63% fewer Medicare Part D claims than the average pediatrics physician in 2024
139 Medicare Part D claims for 29 beneficiaries, against an average of 375 among the 5,609 providers of this specialty who prescribed in Part D. Brand-name drugs were 35% of claims.
Most prescribed
- Rosuvastatin Calcium38 claims
- Ezetimibe27 claims
- Repatha Sureclick24 claims
- Praluent Pen21 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): 74.5 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).
Bills Medicare through 2 group practices
- Ucsf Medical Group Business ServicesSan Francisco, CA
- University OF California San FranciscoSan Francisco, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mary J. Malloy among 9,272 pediatrics physician records in California
Mary J. Malloy, M.D. is one of 9,272 pediatrics physician records with a practice address in California. 31% 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 4% of them.
- NPI issued2006 · 4% of these records are older, 56% newer
- In a Medicare fileYes · 31% of these records are
- In the CMS Doctors and Clinicians fileYes · 8% of these records are
- Graduated1962 · median 2012 among the 754 with a school on file
- Record last updated2008 · 65% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208000000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
514 pediatrics physician records list a practice address in San Francisco
They are 514 of the 38,143 NPPES records with a practice address in San Francisco, and 9,272 pediatrics physician records in California.
All 9,272 in California → Every provider in San Francisco → Pediatrics Physician nationwide →
The 8 pediatrics physician records with the nearest ZIP codes
- Louis Chesler, M.D.San Francisco, CA 941431124060504
- Gwynne Church, M.D.San Francisco, CA 941431801838925
- John Elliott, M.D.San Francisco, CA 941431821042292
- Ilona Frieden, MDSan Francisco, CA 941431396703435
- Samuel Hawgood, MDSan Francisco, CA 941431144285776
- Melvin Heyman, M.D.San Francisco, CA 941431740222314
- Nancy Lewis, M.D.San Francisco, CA 941431245272368
- John McQuitty, M.D.San Francisco, CA 941431386682417
Common questions
What is Mary J. Malloy, M.D.'s NPI number?
Mary J. Malloy, M.D.'s National Provider Identifier (NPI) is 1679500391, issued on Jun 27, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mary J. Malloy, M.D. located?
The NPPES record lists a practice address at 400 Parnassus Ave, San Francisco, CA, 94143. Phone: (415) 353-2350. Providers update this record themselves, so call before visiting.
How can I verify Mary J. Malloy, M.D.'s license?
NPPES lists California license number A20800, 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 Mary J. Malloy, M.D. prescribe under Medicare Part D?
In 2024, Mary J. Malloy, M.D. had 139 Medicare Part D claims for 29 beneficiaries; the average among pediatrics physician prescribers was 375. Part D covers Medicare prescriptions only.
What is Mary J. Malloy, M.D.'s MIPS final score?
The 2023 MIPS final score is 74.5 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.